2019-09-19 18:26:57

by Qian Cai

Subject: [PATCH -next] treewide: remove unused argument in lock_release()

Since the commit b4adfe8e05f1 ("locking/lockdep: Remove unused argument
in __lock_release"), @nested is no longer used in lock_release(), so
remove it from all lock_release() calls and friends.

Signed-off-by: Qian Cai <[email protected]>
---
drivers/gpu/drm/drm_connector.c | 2 +-
drivers/gpu/drm/i915/gem/i915_gem_shrinker.c | 6 +++---
drivers/gpu/drm/i915/gt/intel_engine_pm.c | 2 +-
drivers/gpu/drm/i915/i915_request.c | 2 +-
drivers/tty/tty_ldsem.c | 8 ++++----
fs/dcache.c | 2 +-
fs/jbd2/transaction.c | 4 ++--
fs/kernfs/dir.c | 4 ++--
fs/ocfs2/dlmglue.c | 2 +-
include/linux/jbd2.h | 2 +-
include/linux/lockdep.h | 21 ++++++++++-----------
include/linux/percpu-rwsem.h | 4 ++--
include/linux/rcupdate.h | 2 +-
include/linux/rwlock_api_smp.h | 16 ++++++++--------
include/linux/seqlock.h | 4 ++--
include/linux/spinlock_api_smp.h | 8 ++++----
include/linux/ww_mutex.h | 2 +-
include/net/sock.h | 2 +-
kernel/bpf/stackmap.c | 2 +-
kernel/cpu.c | 2 +-
kernel/locking/lockdep.c | 3 +--
kernel/locking/mutex.c | 4 ++--
kernel/locking/rtmutex.c | 6 +++---
kernel/locking/rwsem.c | 10 +++++-----
kernel/printk/printk.c | 10 +++++-----
kernel/sched/core.c | 2 +-
lib/locking-selftest.c | 24 ++++++++++++------------
mm/memcontrol.c | 2 +-
net/core/sock.c | 2 +-
tools/lib/lockdep/include/liblockdep/common.h | 3 +--
tools/lib/lockdep/include/liblockdep/mutex.h | 2 +-
tools/lib/lockdep/include/liblockdep/rwlock.h | 2 +-
tools/lib/lockdep/preload.c | 16 ++++++++--------
33 files changed, 90 insertions(+), 93 deletions(-)

diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
index 4c766624b20d..4a8b2e5c2af6 100644
--- a/drivers/gpu/drm/drm_connector.c
+++ b/drivers/gpu/drm/drm_connector.c
@@ -719,7 +719,7 @@ void drm_connector_list_iter_end(struct drm_connector_list_iter *iter)
__drm_connector_put_safe(iter->conn);
spin_unlock_irqrestore(&config->connector_list_lock, flags);
}
- lock_release(&connector_list_iter_dep_map, 0, _RET_IP_);
+ lock_release(&connector_list_iter_dep_map, _RET_IP_);
}
EXPORT_SYMBOL(drm_connector_list_iter_end);

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_shrinker.c b/drivers/gpu/drm/i915/gem/i915_gem_shrinker.c
index edd21d14e64f..1a51b3598d63 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_shrinker.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_shrinker.c
@@ -509,14 +509,14 @@ void i915_gem_shrinker_taints_mutex(struct drm_i915_private *i915,
I915_MM_SHRINKER, 0, _RET_IP_);

mutex_acquire(&mutex->dep_map, 0, 0, _RET_IP_);
- mutex_release(&mutex->dep_map, 0, _RET_IP_);
+ mutex_release(&mutex->dep_map, _RET_IP_);

- mutex_release(&i915->drm.struct_mutex.dep_map, 0, _RET_IP_);
+ mutex_release(&i915->drm.struct_mutex.dep_map, _RET_IP_);

fs_reclaim_release(GFP_KERNEL);

if (unlock)
- mutex_release(&i915->drm.struct_mutex.dep_map, 0, _RET_IP_);
+ mutex_release(&i915->drm.struct_mutex.dep_map, _RET_IP_);
}

#define obj_to_i915(obj__) to_i915((obj__)->base.dev)
diff --git a/drivers/gpu/drm/i915/gt/intel_engine_pm.c b/drivers/gpu/drm/i915/gt/intel_engine_pm.c
index 65b5ca74b394..7f647243b3b9 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine_pm.c
+++ b/drivers/gpu/drm/i915/gt/intel_engine_pm.c
@@ -52,7 +52,7 @@ static inline unsigned long __timeline_mark_lock(struct intel_context *ce)
static inline void __timeline_mark_unlock(struct intel_context *ce,
unsigned long flags)
{
- mutex_release(&ce->timeline->mutex.dep_map, 0, _THIS_IP_);
+ mutex_release(&ce->timeline->mutex.dep_map, _THIS_IP_);
local_irq_restore(flags);
}

diff --git a/drivers/gpu/drm/i915/i915_request.c b/drivers/gpu/drm/i915/i915_request.c
index a53777dd371c..e1f1be4d0531 100644
--- a/drivers/gpu/drm/i915/i915_request.c
+++ b/drivers/gpu/drm/i915/i915_request.c
@@ -1456,7 +1456,7 @@ long i915_request_wait(struct i915_request *rq,
dma_fence_remove_callback(&rq->fence, &wait.cb);

out:
- mutex_release(&rq->engine->gt->reset.mutex.dep_map, 0, _THIS_IP_);
+ mutex_release(&rq->engine->gt->reset.mutex.dep_map, _THIS_IP_);
trace_i915_request_wait_end(rq);
return timeout;
}
diff --git a/drivers/tty/tty_ldsem.c b/drivers/tty/tty_ldsem.c
index 60ff236a3d63..ce8291053af3 100644
--- a/drivers/tty/tty_ldsem.c
+++ b/drivers/tty/tty_ldsem.c
@@ -303,7 +303,7 @@ static int __ldsem_down_read_nested(struct ld_semaphore *sem,
if (count <= 0) {
lock_contended(&sem->dep_map, _RET_IP_);
if (!down_read_failed(sem, count, timeout)) {
- rwsem_release(&sem->dep_map, 1, _RET_IP_);
+ rwsem_release(&sem->dep_map, _RET_IP_);
return 0;
}
}
@@ -322,7 +322,7 @@ static int __ldsem_down_write_nested(struct ld_semaphore *sem,
if ((count & LDSEM_ACTIVE_MASK) != LDSEM_ACTIVE_BIAS) {
lock_contended(&sem->dep_map, _RET_IP_);
if (!down_write_failed(sem, count, timeout)) {
- rwsem_release(&sem->dep_map, 1, _RET_IP_);
+ rwsem_release(&sem->dep_map, _RET_IP_);
return 0;
}
}
@@ -390,7 +390,7 @@ void ldsem_up_read(struct ld_semaphore *sem)
{
long count;

- rwsem_release(&sem->dep_map, 1, _RET_IP_);
+ rwsem_release(&sem->dep_map, _RET_IP_);

count = atomic_long_add_return(-LDSEM_READ_BIAS, &sem->count);
if (count < 0 && (count & LDSEM_ACTIVE_MASK) == 0)
@@ -404,7 +404,7 @@ void ldsem_up_write(struct ld_semaphore *sem)
{
long count;

- rwsem_release(&sem->dep_map, 1, _RET_IP_);
+ rwsem_release(&sem->dep_map, _RET_IP_);

count = atomic_long_add_return(-LDSEM_WRITE_BIAS, &sem->count);
if (count < 0)
diff --git a/fs/dcache.c b/fs/dcache.c
index e88cf0554e65..f7931b682a0d 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -1319,7 +1319,7 @@ static void d_walk(struct dentry *parent, void *data,

if (!list_empty(&dentry->d_subdirs)) {
spin_unlock(&this_parent->d_lock);
- spin_release(&dentry->d_lock.dep_map, 1, _RET_IP_);
+ spin_release(&dentry->d_lock.dep_map, _RET_IP_);
this_parent = dentry;
spin_acquire(&this_parent->d_lock.dep_map, 0, 1, _RET_IP_);
goto repeat;
diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c
index bee8498d7792..b25ebdcabfa3 100644
--- a/fs/jbd2/transaction.c
+++ b/fs/jbd2/transaction.c
@@ -713,7 +713,7 @@ int jbd2__journal_restart(handle_t *handle, int nblocks, gfp_t gfp_mask)
if (need_to_start)
jbd2_log_start_commit(journal, tid);

- rwsem_release(&journal->j_trans_commit_map, 1, _THIS_IP_);
+ rwsem_release(&journal->j_trans_commit_map, _THIS_IP_);
handle->h_buffer_credits = nblocks;
/*
* Restore the original nofs context because the journal restart
@@ -1848,7 +1848,7 @@ int jbd2_journal_stop(handle_t *handle)
wake_up(&journal->j_wait_transaction_locked);
}

- rwsem_release(&journal->j_trans_commit_map, 1, _THIS_IP_);
+ rwsem_release(&journal->j_trans_commit_map, _THIS_IP_);

if (wait_for_commit)
err = jbd2_log_wait_commit(journal, tid);
diff --git a/fs/kernfs/dir.c b/fs/kernfs/dir.c
index 6ebae6bbe6a5..c45b82feac9a 100644
--- a/fs/kernfs/dir.c
+++ b/fs/kernfs/dir.c
@@ -438,7 +438,7 @@ void kernfs_put_active(struct kernfs_node *kn)
return;

if (kernfs_lockdep(kn))
- rwsem_release(&kn->dep_map, 1, _RET_IP_);
+ rwsem_release(&kn->dep_map, _RET_IP_);
v = atomic_dec_return(&kn->active);
if (likely(v != KN_DEACTIVATED_BIAS))
return;
@@ -476,7 +476,7 @@ static void kernfs_drain(struct kernfs_node *kn)

if (kernfs_lockdep(kn)) {
lock_acquired(&kn->dep_map, _RET_IP_);
- rwsem_release(&kn->dep_map, 1, _RET_IP_);
+ rwsem_release(&kn->dep_map, _RET_IP_);
}

kernfs_drain_open_files(kn);
diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c
index ad594fef2ab0..71975b9b142c 100644
--- a/fs/ocfs2/dlmglue.c
+++ b/fs/ocfs2/dlmglue.c
@@ -1687,7 +1687,7 @@ static void __ocfs2_cluster_unlock(struct ocfs2_super *osb,
spin_unlock_irqrestore(&lockres->l_lock, flags);
#ifdef CONFIG_DEBUG_LOCK_ALLOC
if (lockres->l_lockdep_map.key != NULL)
- rwsem_release(&lockres->l_lockdep_map, 1, caller_ip);
+ rwsem_release(&lockres->l_lockdep_map, caller_ip);
#endif
}

diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h
index 603fbc4e2f70..564793c24d12 100644
--- a/include/linux/jbd2.h
+++ b/include/linux/jbd2.h
@@ -1170,7 +1170,7 @@ struct journal_s
#define jbd2_might_wait_for_commit(j) \
do { \
rwsem_acquire(&j->j_trans_commit_map, 0, 0, _THIS_IP_); \
- rwsem_release(&j->j_trans_commit_map, 1, _THIS_IP_); \
+ rwsem_release(&j->j_trans_commit_map, _THIS_IP_); \
} while (0)

/* journal feature predicate functions */
diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h
index b8a835fd611b..c50d01ef1414 100644
--- a/include/linux/lockdep.h
+++ b/include/linux/lockdep.h
@@ -349,8 +349,7 @@ extern void lock_acquire(struct lockdep_map *lock, unsigned int subclass,
int trylock, int read, int check,
struct lockdep_map *nest_lock, unsigned long ip);

-extern void lock_release(struct lockdep_map *lock, int nested,
- unsigned long ip);
+extern void lock_release(struct lockdep_map *lock, unsigned long ip);

/*
* Same "read" as for lock_acquire(), except -1 means any.
@@ -428,7 +427,7 @@ static inline void lockdep_set_selftest_task(struct task_struct *task)
}

# define lock_acquire(l, s, t, r, c, n, i) do { } while (0)
-# define lock_release(l, n, i) do { } while (0)
+# define lock_release(l, i) do { } while (0)
# define lock_downgrade(l, i) do { } while (0)
# define lock_set_class(l, n, k, s, i) do { } while (0)
# define lock_set_subclass(l, s, i) do { } while (0)
@@ -591,42 +590,42 @@ static inline void print_irqtrace_events(struct task_struct *curr)

#define spin_acquire(l, s, t, i) lock_acquire_exclusive(l, s, t, NULL, i)
#define spin_acquire_nest(l, s, t, n, i) lock_acquire_exclusive(l, s, t, n, i)
-#define spin_release(l, n, i) lock_release(l, n, i)
+#define spin_release(l, i) lock_release(l, i)

#define rwlock_acquire(l, s, t, i) lock_acquire_exclusive(l, s, t, NULL, i)
#define rwlock_acquire_read(l, s, t, i) lock_acquire_shared_recursive(l, s, t, NULL, i)
-#define rwlock_release(l, n, i) lock_release(l, n, i)
+#define rwlock_release(l, i) lock_release(l, i)

#define seqcount_acquire(l, s, t, i) lock_acquire_exclusive(l, s, t, NULL, i)
#define seqcount_acquire_read(l, s, t, i) lock_acquire_shared_recursive(l, s, t, NULL, i)
-#define seqcount_release(l, n, i) lock_release(l, n, i)
+#define seqcount_release(l, i) lock_release(l, i)

#define mutex_acquire(l, s, t, i) lock_acquire_exclusive(l, s, t, NULL, i)
#define mutex_acquire_nest(l, s, t, n, i) lock_acquire_exclusive(l, s, t, n, i)
-#define mutex_release(l, n, i) lock_release(l, n, i)
+#define mutex_release(l, i) lock_release(l, i)

#define rwsem_acquire(l, s, t, i) lock_acquire_exclusive(l, s, t, NULL, i)
#define rwsem_acquire_nest(l, s, t, n, i) lock_acquire_exclusive(l, s, t, n, i)
#define rwsem_acquire_read(l, s, t, i) lock_acquire_shared(l, s, t, NULL, i)
-#define rwsem_release(l, n, i) lock_release(l, n, i)
+#define rwsem_release(l, i) lock_release(l, i)

#define lock_map_acquire(l) lock_acquire_exclusive(l, 0, 0, NULL, _THIS_IP_)
#define lock_map_acquire_read(l) lock_acquire_shared_recursive(l, 0, 0, NULL, _THIS_IP_)
#define lock_map_acquire_tryread(l) lock_acquire_shared_recursive(l, 0, 1, NULL, _THIS_IP_)
-#define lock_map_release(l) lock_release(l, 1, _THIS_IP_)
+#define lock_map_release(l) lock_release(l, _THIS_IP_)

#ifdef CONFIG_PROVE_LOCKING
# define might_lock(lock) \
do { \
typecheck(struct lockdep_map *, &(lock)->dep_map); \
lock_acquire(&(lock)->dep_map, 0, 0, 0, 1, NULL, _THIS_IP_); \
- lock_release(&(lock)->dep_map, 0, _THIS_IP_); \
+ lock_release(&(lock)->dep_map, _THIS_IP_); \
} while (0)
# define might_lock_read(lock) \
do { \
typecheck(struct lockdep_map *, &(lock)->dep_map); \
lock_acquire(&(lock)->dep_map, 0, 0, 1, 1, NULL, _THIS_IP_); \
- lock_release(&(lock)->dep_map, 0, _THIS_IP_); \
+ lock_release(&(lock)->dep_map, _THIS_IP_); \
} while (0)

#define lockdep_assert_irqs_enabled() do { \
diff --git a/include/linux/percpu-rwsem.h b/include/linux/percpu-rwsem.h
index 3998cdf9cd14..ad2ca2a89d5b 100644
--- a/include/linux/percpu-rwsem.h
+++ b/include/linux/percpu-rwsem.h
@@ -93,7 +93,7 @@ static inline void percpu_up_read(struct percpu_rw_semaphore *sem)
__percpu_up_read(sem); /* Unconditional memory barrier */
preempt_enable();

- rwsem_release(&sem->rw_sem.dep_map, 1, _RET_IP_);
+ rwsem_release(&sem->rw_sem.dep_map, _RET_IP_);
}

extern void percpu_down_write(struct percpu_rw_semaphore *);
@@ -118,7 +118,7 @@ extern int __percpu_init_rwsem(struct percpu_rw_semaphore *,
static inline void percpu_rwsem_release(struct percpu_rw_semaphore *sem,
bool read, unsigned long ip)
{
- lock_release(&sem->rw_sem.dep_map, 1, ip);
+ lock_release(&sem->rw_sem.dep_map, ip);
#ifdef CONFIG_RWSEM_SPIN_ON_OWNER
if (!read)
atomic_long_set(&sem->rw_sem.owner, RWSEM_OWNER_UNKNOWN);
diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h
index 75a2eded7aa2..269b31eab3d6 100644
--- a/include/linux/rcupdate.h
+++ b/include/linux/rcupdate.h
@@ -210,7 +210,7 @@ static inline void rcu_lock_acquire(struct lockdep_map *map)

static inline void rcu_lock_release(struct lockdep_map *map)
{
- lock_release(map, 1, _THIS_IP_);
+ lock_release(map, _THIS_IP_);
}

extern struct lockdep_map rcu_lock_map;
diff --git a/include/linux/rwlock_api_smp.h b/include/linux/rwlock_api_smp.h
index 86ebb4bf9c6e..abfb53ab11be 100644
--- a/include/linux/rwlock_api_smp.h
+++ b/include/linux/rwlock_api_smp.h
@@ -215,14 +215,14 @@ static inline void __raw_write_lock(rwlock_t *lock)

static inline void __raw_write_unlock(rwlock_t *lock)
{
- rwlock_release(&lock->dep_map, 1, _RET_IP_);
+ rwlock_release(&lock->dep_map, _RET_IP_);
do_raw_write_unlock(lock);
preempt_enable();
}

static inline void __raw_read_unlock(rwlock_t *lock)
{
- rwlock_release(&lock->dep_map, 1, _RET_IP_);
+ rwlock_release(&lock->dep_map, _RET_IP_);
do_raw_read_unlock(lock);
preempt_enable();
}
@@ -230,7 +230,7 @@ static inline void __raw_read_unlock(rwlock_t *lock)
static inline void
__raw_read_unlock_irqrestore(rwlock_t *lock, unsigned long flags)
{
- rwlock_release(&lock->dep_map, 1, _RET_IP_);
+ rwlock_release(&lock->dep_map, _RET_IP_);
do_raw_read_unlock(lock);
local_irq_restore(flags);
preempt_enable();
@@ -238,7 +238,7 @@ static inline void __raw_read_unlock(rwlock_t *lock)

static inline void __raw_read_unlock_irq(rwlock_t *lock)
{
- rwlock_release(&lock->dep_map, 1, _RET_IP_);
+ rwlock_release(&lock->dep_map, _RET_IP_);
do_raw_read_unlock(lock);
local_irq_enable();
preempt_enable();
@@ -246,7 +246,7 @@ static inline void __raw_read_unlock_irq(rwlock_t *lock)

static inline void __raw_read_unlock_bh(rwlock_t *lock)
{
- rwlock_release(&lock->dep_map, 1, _RET_IP_);
+ rwlock_release(&lock->dep_map, _RET_IP_);
do_raw_read_unlock(lock);
__local_bh_enable_ip(_RET_IP_, SOFTIRQ_LOCK_OFFSET);
}
@@ -254,7 +254,7 @@ static inline void __raw_read_unlock_bh(rwlock_t *lock)
static inline void __raw_write_unlock_irqrestore(rwlock_t *lock,
unsigned long flags)
{
- rwlock_release(&lock->dep_map, 1, _RET_IP_);
+ rwlock_release(&lock->dep_map, _RET_IP_);
do_raw_write_unlock(lock);
local_irq_restore(flags);
preempt_enable();
@@ -262,7 +262,7 @@ static inline void __raw_write_unlock_irqrestore(rwlock_t *lock,

static inline void __raw_write_unlock_irq(rwlock_t *lock)
{
- rwlock_release(&lock->dep_map, 1, _RET_IP_);
+ rwlock_release(&lock->dep_map, _RET_IP_);
do_raw_write_unlock(lock);
local_irq_enable();
preempt_enable();
@@ -270,7 +270,7 @@ static inline void __raw_write_unlock_irq(rwlock_t *lock)

static inline void __raw_write_unlock_bh(rwlock_t *lock)
{
- rwlock_release(&lock->dep_map, 1, _RET_IP_);
+ rwlock_release(&lock->dep_map, _RET_IP_);
do_raw_write_unlock(lock);
__local_bh_enable_ip(_RET_IP_, SOFTIRQ_LOCK_OFFSET);
}
diff --git a/include/linux/seqlock.h b/include/linux/seqlock.h
index bcf4cf26b8c8..0491d963d47e 100644
--- a/include/linux/seqlock.h
+++ b/include/linux/seqlock.h
@@ -79,7 +79,7 @@ static inline void seqcount_lockdep_reader_access(const seqcount_t *s)

local_irq_save(flags);
seqcount_acquire_read(&l->dep_map, 0, 0, _RET_IP_);
- seqcount_release(&l->dep_map, 1, _RET_IP_);
+ seqcount_release(&l->dep_map, _RET_IP_);
local_irq_restore(flags);
}

@@ -384,7 +384,7 @@ static inline void write_seqcount_begin(seqcount_t *s)

static inline void write_seqcount_end(seqcount_t *s)
{
- seqcount_release(&s->dep_map, 1, _RET_IP_);
+ seqcount_release(&s->dep_map, _RET_IP_);
raw_write_seqcount_end(s);
}

diff --git a/include/linux/spinlock_api_smp.h b/include/linux/spinlock_api_smp.h
index b762eaba4cdf..19a9be9d97ee 100644
--- a/include/linux/spinlock_api_smp.h
+++ b/include/linux/spinlock_api_smp.h
@@ -147,7 +147,7 @@ static inline void __raw_spin_lock(raw_spinlock_t *lock)

static inline void __raw_spin_unlock(raw_spinlock_t *lock)
{
- spin_release(&lock->dep_map, 1, _RET_IP_);
+ spin_release(&lock->dep_map, _RET_IP_);
do_raw_spin_unlock(lock);
preempt_enable();
}
@@ -155,7 +155,7 @@ static inline void __raw_spin_unlock(raw_spinlock_t *lock)
static inline void __raw_spin_unlock_irqrestore(raw_spinlock_t *lock,
unsigned long flags)
{
- spin_release(&lock->dep_map, 1, _RET_IP_);
+ spin_release(&lock->dep_map, _RET_IP_);
do_raw_spin_unlock(lock);
local_irq_restore(flags);
preempt_enable();
@@ -163,7 +163,7 @@ static inline void __raw_spin_unlock_irqrestore(raw_spinlock_t *lock,

static inline void __raw_spin_unlock_irq(raw_spinlock_t *lock)
{
- spin_release(&lock->dep_map, 1, _RET_IP_);
+ spin_release(&lock->dep_map, _RET_IP_);
do_raw_spin_unlock(lock);
local_irq_enable();
preempt_enable();
@@ -171,7 +171,7 @@ static inline void __raw_spin_unlock_irq(raw_spinlock_t *lock)

static inline void __raw_spin_unlock_bh(raw_spinlock_t *lock)
{
- spin_release(&lock->dep_map, 1, _RET_IP_);
+ spin_release(&lock->dep_map, _RET_IP_);
do_raw_spin_unlock(lock);
__local_bh_enable_ip(_RET_IP_, SOFTIRQ_LOCK_OFFSET);
}
diff --git a/include/linux/ww_mutex.h b/include/linux/ww_mutex.h
index 3af7c0e03be5..d7554252404c 100644
--- a/include/linux/ww_mutex.h
+++ b/include/linux/ww_mutex.h
@@ -182,7 +182,7 @@ static inline void ww_acquire_done(struct ww_acquire_ctx *ctx)
static inline void ww_acquire_fini(struct ww_acquire_ctx *ctx)
{
#ifdef CONFIG_DEBUG_MUTEXES
- mutex_release(&ctx->dep_map, 0, _THIS_IP_);
+ mutex_release(&ctx->dep_map, _THIS_IP_);

DEBUG_LOCKS_WARN_ON(ctx->acquired);
if (!IS_ENABLED(CONFIG_PROVE_LOCKING))
diff --git a/include/net/sock.h b/include/net/sock.h
index 2c53f1a1d905..e46db0c846d2 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -1484,7 +1484,7 @@ static inline void sock_release_ownership(struct sock *sk)
sk->sk_lock.owned = 0;

/* The sk_lock has mutex_unlock() semantics: */
- mutex_release(&sk->sk_lock.dep_map, 1, _RET_IP_);
+ mutex_release(&sk->sk_lock.dep_map, _RET_IP_);
}
}

diff --git a/kernel/bpf/stackmap.c b/kernel/bpf/stackmap.c
index 052580c33d26..dcfe2d37ad15 100644
--- a/kernel/bpf/stackmap.c
+++ b/kernel/bpf/stackmap.c
@@ -338,7 +338,7 @@ static void stack_map_get_build_id_offset(struct bpf_stack_build_id *id_offs,
* up_read_non_owner(). The rwsem_release() is called
* here to release the lock from lockdep's perspective.
*/
- rwsem_release(&current->mm->mmap_sem.dep_map, 1, _RET_IP_);
+ rwsem_release(&current->mm->mmap_sem.dep_map, _RET_IP_);
}
}

diff --git a/kernel/cpu.c b/kernel/cpu.c
index e1967e9eddc2..97ed88e0cf72 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -336,7 +336,7 @@ static void lockdep_acquire_cpus_lock(void)

static void lockdep_release_cpus_lock(void)
{
- rwsem_release(&cpu_hotplug_lock.rw_sem.dep_map, 1, _THIS_IP_);
+ rwsem_release(&cpu_hotplug_lock.rw_sem.dep_map, _THIS_IP_);
}

/*
diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
index 233459c03b5a..8123518f9045 100644
--- a/kernel/locking/lockdep.c
+++ b/kernel/locking/lockdep.c
@@ -4491,8 +4491,7 @@ void lock_acquire(struct lockdep_map *lock, unsigned int subclass,
}
EXPORT_SYMBOL_GPL(lock_acquire);

-void lock_release(struct lockdep_map *lock, int nested,
- unsigned long ip)
+void lock_release(struct lockdep_map *lock, unsigned long ip)
{
unsigned long flags;

diff --git a/kernel/locking/mutex.c b/kernel/locking/mutex.c
index 468a9b8422e3..5352ce50a97e 100644
--- a/kernel/locking/mutex.c
+++ b/kernel/locking/mutex.c
@@ -1091,7 +1091,7 @@ void __sched ww_mutex_unlock(struct ww_mutex *lock)
err_early_kill:
spin_unlock(&lock->wait_lock);
debug_mutex_free_waiter(&waiter);
- mutex_release(&lock->dep_map, 1, ip);
+ mutex_release(&lock->dep_map, ip);
preempt_enable();
return ret;
}
@@ -1225,7 +1225,7 @@ static noinline void __sched __mutex_unlock_slowpath(struct mutex *lock, unsigne
DEFINE_WAKE_Q(wake_q);
unsigned long owner;

- mutex_release(&lock->dep_map, 1, ip);
+ mutex_release(&lock->dep_map, ip);

/*
* Release the lock before (potentially) taking the spinlock such that
diff --git a/kernel/locking/rtmutex.c b/kernel/locking/rtmutex.c
index 2874bf556162..851bbb10819d 100644
--- a/kernel/locking/rtmutex.c
+++ b/kernel/locking/rtmutex.c
@@ -1517,7 +1517,7 @@ int __sched rt_mutex_lock_interruptible(struct rt_mutex *lock)
mutex_acquire(&lock->dep_map, 0, 0, _RET_IP_);
ret = rt_mutex_fastlock(lock, TASK_INTERRUPTIBLE, rt_mutex_slowlock);
if (ret)
- mutex_release(&lock->dep_map, 1, _RET_IP_);
+ mutex_release(&lock->dep_map, _RET_IP_);

return ret;
}
@@ -1561,7 +1561,7 @@ int __sched __rt_mutex_futex_trylock(struct rt_mutex *lock)
RT_MUTEX_MIN_CHAINWALK,
rt_mutex_slowlock);
if (ret)
- mutex_release(&lock->dep_map, 1, _RET_IP_);
+ mutex_release(&lock->dep_map, _RET_IP_);

return ret;
}
@@ -1600,7 +1600,7 @@ int __sched rt_mutex_trylock(struct rt_mutex *lock)
*/
void __sched rt_mutex_unlock(struct rt_mutex *lock)
{
- mutex_release(&lock->dep_map, 1, _RET_IP_);
+ mutex_release(&lock->dep_map, _RET_IP_);
rt_mutex_fastunlock(lock, rt_mutex_slowunlock);
}
EXPORT_SYMBOL_GPL(rt_mutex_unlock);
diff --git a/kernel/locking/rwsem.c b/kernel/locking/rwsem.c
index eef04551eae7..44e68761f432 100644
--- a/kernel/locking/rwsem.c
+++ b/kernel/locking/rwsem.c
@@ -1504,7 +1504,7 @@ int __sched down_read_killable(struct rw_semaphore *sem)
rwsem_acquire_read(&sem->dep_map, 0, 0, _RET_IP_);

if (LOCK_CONTENDED_RETURN(sem, __down_read_trylock, __down_read_killable)) {
- rwsem_release(&sem->dep_map, 1, _RET_IP_);
+ rwsem_release(&sem->dep_map, _RET_IP_);
return -EINTR;
}

@@ -1546,7 +1546,7 @@ int __sched down_write_killable(struct rw_semaphore *sem)

if (LOCK_CONTENDED_RETURN(sem, __down_write_trylock,
__down_write_killable)) {
- rwsem_release(&sem->dep_map, 1, _RET_IP_);
+ rwsem_release(&sem->dep_map, _RET_IP_);
return -EINTR;
}

@@ -1573,7 +1573,7 @@ int down_write_trylock(struct rw_semaphore *sem)
*/
void up_read(struct rw_semaphore *sem)
{
- rwsem_release(&sem->dep_map, 1, _RET_IP_);
+ rwsem_release(&sem->dep_map, _RET_IP_);
__up_read(sem);
}
EXPORT_SYMBOL(up_read);
@@ -1583,7 +1583,7 @@ void up_read(struct rw_semaphore *sem)
*/
void up_write(struct rw_semaphore *sem)
{
- rwsem_release(&sem->dep_map, 1, _RET_IP_);
+ rwsem_release(&sem->dep_map, _RET_IP_);
__up_write(sem);
}
EXPORT_SYMBOL(up_write);
@@ -1639,7 +1639,7 @@ int __sched down_write_killable_nested(struct rw_semaphore *sem, int subclass)

if (LOCK_CONTENDED_RETURN(sem, __down_write_trylock,
__down_write_killable)) {
- rwsem_release(&sem->dep_map, 1, _RET_IP_);
+ rwsem_release(&sem->dep_map, _RET_IP_);
return -EINTR;
}

diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index ca65327a6de8..c8be5a0f5259 100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -248,7 +248,7 @@ static void __up_console_sem(unsigned long ip)
{
unsigned long flags;

- mutex_release(&console_lock_dep_map, 1, ip);
+ mutex_release(&console_lock_dep_map, ip);

printk_safe_enter_irqsave(flags);
up(&console_sem);
@@ -1679,20 +1679,20 @@ static int console_lock_spinning_disable_and_check(void)
raw_spin_unlock(&console_owner_lock);

if (!waiter) {
- spin_release(&console_owner_dep_map, 1, _THIS_IP_);
+ spin_release(&console_owner_dep_map, _THIS_IP_);
return 0;
}

/* The waiter is now free to continue */
WRITE_ONCE(console_waiter, false);

- spin_release(&console_owner_dep_map, 1, _THIS_IP_);
+ spin_release(&console_owner_dep_map, _THIS_IP_);

/*
* Hand off console_lock to waiter. The waiter will perform
* the up(). After this, the waiter is the console_lock owner.
*/
- mutex_release(&console_lock_dep_map, 1, _THIS_IP_);
+ mutex_release(&console_lock_dep_map, _THIS_IP_);
return 1;
}

@@ -1746,7 +1746,7 @@ static int console_trylock_spinning(void)
/* Owner will clear console_waiter on hand off */
while (READ_ONCE(console_waiter))
cpu_relax();
- spin_release(&console_owner_dep_map, 1, _THIS_IP_);
+ spin_release(&console_owner_dep_map, _THIS_IP_);

printk_safe_exit_irqrestore(flags);
/*
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index f9a1346a5fa9..f845693e8e75 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -3105,7 +3105,7 @@ static inline void finish_task(struct task_struct *prev)
* do an early lockdep release here:
*/
rq_unpin_lock(rq, rf);
- spin_release(&rq->lock.dep_map, 1, _THIS_IP_);
+ spin_release(&rq->lock.dep_map, _THIS_IP_);
#ifdef CONFIG_DEBUG_SPINLOCK
/* this is a valid case when another task releases the spinlock */
rq->lock.owner = next;
diff --git a/lib/locking-selftest.c b/lib/locking-selftest.c
index a1705545e6ac..14f44f59e733 100644
--- a/lib/locking-selftest.c
+++ b/lib/locking-selftest.c
@@ -1475,7 +1475,7 @@ static void ww_test_edeadlk_normal(void)

mutex_lock(&o2.base);
o2.ctx = &t2;
- mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
+ mutex_release(&o2.base.dep_map, _THIS_IP_);

WWAI(&t);
t2 = t;
@@ -1500,7 +1500,7 @@ static void ww_test_edeadlk_normal_slow(void)
int ret;

mutex_lock(&o2.base);
- mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
+ mutex_release(&o2.base.dep_map, _THIS_IP_);
o2.ctx = &t2;

WWAI(&t);
@@ -1527,7 +1527,7 @@ static void ww_test_edeadlk_no_unlock(void)

mutex_lock(&o2.base);
o2.ctx = &t2;
- mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
+ mutex_release(&o2.base.dep_map, _THIS_IP_);

WWAI(&t);
t2 = t;
@@ -1551,7 +1551,7 @@ static void ww_test_edeadlk_no_unlock_slow(void)
int ret;

mutex_lock(&o2.base);
- mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
+ mutex_release(&o2.base.dep_map, _THIS_IP_);
o2.ctx = &t2;

WWAI(&t);
@@ -1576,7 +1576,7 @@ static void ww_test_edeadlk_acquire_more(void)
int ret;

mutex_lock(&o2.base);
- mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
+ mutex_release(&o2.base.dep_map, _THIS_IP_);
o2.ctx = &t2;

WWAI(&t);
@@ -1597,7 +1597,7 @@ static void ww_test_edeadlk_acquire_more_slow(void)
int ret;

mutex_lock(&o2.base);
- mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
+ mutex_release(&o2.base.dep_map, _THIS_IP_);
o2.ctx = &t2;

WWAI(&t);
@@ -1618,11 +1618,11 @@ static void ww_test_edeadlk_acquire_more_edeadlk(void)
int ret;

mutex_lock(&o2.base);
- mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
+ mutex_release(&o2.base.dep_map, _THIS_IP_);
o2.ctx = &t2;

mutex_lock(&o3.base);
- mutex_release(&o3.base.dep_map, 1, _THIS_IP_);
+ mutex_release(&o3.base.dep_map, _THIS_IP_);
o3.ctx = &t2;

WWAI(&t);
@@ -1644,11 +1644,11 @@ static void ww_test_edeadlk_acquire_more_edeadlk_slow(void)
int ret;

mutex_lock(&o2.base);
- mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
+ mutex_release(&o2.base.dep_map, _THIS_IP_);
o2.ctx = &t2;

mutex_lock(&o3.base);
- mutex_release(&o3.base.dep_map, 1, _THIS_IP_);
+ mutex_release(&o3.base.dep_map, _THIS_IP_);
o3.ctx = &t2;

WWAI(&t);
@@ -1669,7 +1669,7 @@ static void ww_test_edeadlk_acquire_wrong(void)
int ret;

mutex_lock(&o2.base);
- mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
+ mutex_release(&o2.base.dep_map, _THIS_IP_);
o2.ctx = &t2;

WWAI(&t);
@@ -1694,7 +1694,7 @@ static void ww_test_edeadlk_acquire_wrong_slow(void)
int ret;

mutex_lock(&o2.base);
- mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
+ mutex_release(&o2.base.dep_map, _THIS_IP_);
o2.ctx = &t2;

WWAI(&t);
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 1c4c08b45e44..3956ab6dba14 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -1800,7 +1800,7 @@ static void mem_cgroup_oom_unlock(struct mem_cgroup *memcg)
struct mem_cgroup *iter;

spin_lock(&memcg_oom_lock);
- mutex_release(&memcg_oom_lock_dep_map, 1, _RET_IP_);
+ mutex_release(&memcg_oom_lock_dep_map, _RET_IP_);
for_each_mem_cgroup_tree(iter, memcg)
iter->oom_lock = false;
spin_unlock(&memcg_oom_lock);
diff --git a/net/core/sock.c b/net/core/sock.c
index 07863edbe6fc..a988e70cdac5 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -521,7 +521,7 @@ int __sk_receive_skb(struct sock *sk, struct sk_buff *skb,

rc = sk_backlog_rcv(sk, skb);

- mutex_release(&sk->sk_lock.dep_map, 1, _RET_IP_);
+ mutex_release(&sk->sk_lock.dep_map, _RET_IP_);
} else if (sk_add_backlog(sk, skb, sk->sk_rcvbuf)) {
bh_unlock_sock(sk);
atomic_inc(&sk->sk_drops);
diff --git a/tools/lib/lockdep/include/liblockdep/common.h b/tools/lib/lockdep/include/liblockdep/common.h
index a81d91d4fc78..a6d7ee5f18ba 100644
--- a/tools/lib/lockdep/include/liblockdep/common.h
+++ b/tools/lib/lockdep/include/liblockdep/common.h
@@ -42,8 +42,7 @@ void lockdep_init_map(struct lockdep_map *lock, const char *name,
void lock_acquire(struct lockdep_map *lock, unsigned int subclass,
int trylock, int read, int check,
struct lockdep_map *nest_lock, unsigned long ip);
-void lock_release(struct lockdep_map *lock, int nested,
- unsigned long ip);
+void lock_release(struct lockdep_map *lock, unsigned long ip);
void lockdep_reset_lock(struct lockdep_map *lock);
void lockdep_register_key(struct lock_class_key *key);
void lockdep_unregister_key(struct lock_class_key *key);
diff --git a/tools/lib/lockdep/include/liblockdep/mutex.h b/tools/lib/lockdep/include/liblockdep/mutex.h
index 783dd0df06f9..bd106b82759b 100644
--- a/tools/lib/lockdep/include/liblockdep/mutex.h
+++ b/tools/lib/lockdep/include/liblockdep/mutex.h
@@ -42,7 +42,7 @@ static inline int liblockdep_pthread_mutex_lock(liblockdep_pthread_mutex_t *lock

static inline int liblockdep_pthread_mutex_unlock(liblockdep_pthread_mutex_t *lock)
{
- lock_release(&lock->dep_map, 0, (unsigned long)_RET_IP_);
+ lock_release(&lock->dep_map, (unsigned long)_RET_IP_);
return pthread_mutex_unlock(&lock->mutex);
}

diff --git a/tools/lib/lockdep/include/liblockdep/rwlock.h b/tools/lib/lockdep/include/liblockdep/rwlock.h
index 365762e3a1ea..6d5d2932bf4d 100644
--- a/tools/lib/lockdep/include/liblockdep/rwlock.h
+++ b/tools/lib/lockdep/include/liblockdep/rwlock.h
@@ -44,7 +44,7 @@ static inline int liblockdep_pthread_rwlock_rdlock(liblockdep_pthread_rwlock_t *

static inline int liblockdep_pthread_rwlock_unlock(liblockdep_pthread_rwlock_t *lock)
{
- lock_release(&lock->dep_map, 0, (unsigned long)_RET_IP_);
+ lock_release(&lock->dep_map, (unsigned long)_RET_IP_);
return pthread_rwlock_unlock(&lock->rwlock);
}

diff --git a/tools/lib/lockdep/preload.c b/tools/lib/lockdep/preload.c
index 76245d16196d..8f1adbe887b2 100644
--- a/tools/lib/lockdep/preload.c
+++ b/tools/lib/lockdep/preload.c
@@ -270,7 +270,7 @@ int pthread_mutex_lock(pthread_mutex_t *mutex)
*/
r = ll_pthread_mutex_lock(mutex);
if (r)
- lock_release(&__get_lock(mutex)->dep_map, 0, (unsigned long)_RET_IP_);
+ lock_release(&__get_lock(mutex)->dep_map, (unsigned long)_RET_IP_);

return r;
}
@@ -284,7 +284,7 @@ int pthread_mutex_trylock(pthread_mutex_t *mutex)
lock_acquire(&__get_lock(mutex)->dep_map, 0, 1, 0, 1, NULL, (unsigned long)_RET_IP_);
r = ll_pthread_mutex_trylock(mutex);
if (r)
- lock_release(&__get_lock(mutex)->dep_map, 0, (unsigned long)_RET_IP_);
+ lock_release(&__get_lock(mutex)->dep_map, (unsigned long)_RET_IP_);

return r;
}
@@ -295,7 +295,7 @@ int pthread_mutex_unlock(pthread_mutex_t *mutex)

try_init_preload();

- lock_release(&__get_lock(mutex)->dep_map, 0, (unsigned long)_RET_IP_);
+ lock_release(&__get_lock(mutex)->dep_map, (unsigned long)_RET_IP_);
/*
* Just like taking a lock, only in reverse!
*
@@ -355,7 +355,7 @@ int pthread_rwlock_rdlock(pthread_rwlock_t *rwlock)
lock_acquire(&__get_lock(rwlock)->dep_map, 0, 0, 2, 1, NULL, (unsigned long)_RET_IP_);
r = ll_pthread_rwlock_rdlock(rwlock);
if (r)
- lock_release(&__get_lock(rwlock)->dep_map, 0, (unsigned long)_RET_IP_);
+ lock_release(&__get_lock(rwlock)->dep_map, (unsigned long)_RET_IP_);

return r;
}
@@ -369,7 +369,7 @@ int pthread_rwlock_tryrdlock(pthread_rwlock_t *rwlock)
lock_acquire(&__get_lock(rwlock)->dep_map, 0, 1, 2, 1, NULL, (unsigned long)_RET_IP_);
r = ll_pthread_rwlock_tryrdlock(rwlock);
if (r)
- lock_release(&__get_lock(rwlock)->dep_map, 0, (unsigned long)_RET_IP_);
+ lock_release(&__get_lock(rwlock)->dep_map, (unsigned long)_RET_IP_);

return r;
}
@@ -383,7 +383,7 @@ int pthread_rwlock_trywrlock(pthread_rwlock_t *rwlock)
lock_acquire(&__get_lock(rwlock)->dep_map, 0, 1, 0, 1, NULL, (unsigned long)_RET_IP_);
r = ll_pthread_rwlock_trywrlock(rwlock);
if (r)
- lock_release(&__get_lock(rwlock)->dep_map, 0, (unsigned long)_RET_IP_);
+ lock_release(&__get_lock(rwlock)->dep_map, (unsigned long)_RET_IP_);

return r;
}
@@ -397,7 +397,7 @@ int pthread_rwlock_wrlock(pthread_rwlock_t *rwlock)
lock_acquire(&__get_lock(rwlock)->dep_map, 0, 0, 0, 1, NULL, (unsigned long)_RET_IP_);
r = ll_pthread_rwlock_wrlock(rwlock);
if (r)
- lock_release(&__get_lock(rwlock)->dep_map, 0, (unsigned long)_RET_IP_);
+ lock_release(&__get_lock(rwlock)->dep_map, (unsigned long)_RET_IP_);

return r;
}
@@ -408,7 +408,7 @@ int pthread_rwlock_unlock(pthread_rwlock_t *rwlock)

init_preload();

- lock_release(&__get_lock(rwlock)->dep_map, 0, (unsigned long)_RET_IP_);
+ lock_release(&__get_lock(rwlock)->dep_map, (unsigned long)_RET_IP_);
r = ll_pthread_rwlock_unlock(rwlock);
if (r)
lock_acquire(&__get_lock(rwlock)->dep_map, 0, 0, 0, 1, NULL, (unsigned long)_RET_IP_);
--
1.8.3.1

2019-09-20 19:05:40

by Will Deacon

Subject: Re: [PATCH -next] treewide: remove unused argument in lock_release()

On Thu, Sep 19, 2019 at 12:09:40PM -0400, Qian Cai wrote:
> Since the commit b4adfe8e05f1 ("locking/lockdep: Remove unused argument
> in __lock_release"), @nested is no longer used in lock_release(), so
> remove it from all lock_release() calls and friends.
>
> Signed-off-by: Qian Cai <[email protected]>
> ---

Although this looks fine to me at a first glance, it might be slightly
easier to manage if you hit {spin,rwlock,seqcount,mutex,rwsem}_release()
first with coccinelle scripts, and then hack lock_release() as a final
patch. That way it's easy to regenerate things if needed.

Cheers,

Will

2019-09-20 19:21:01

by Qian Cai

Subject: Re: [PATCH -next] treewide: remove unused argument in lock_release()

On Fri, 2019-09-20 at 10:38 +0100, Will Deacon wrote:
> On Thu, Sep 19, 2019 at 12:09:40PM -0400, Qian Cai wrote:
> > Since the commit b4adfe8e05f1 ("locking/lockdep: Remove unused argument
> > in __lock_release"), @nested is no longer used in lock_release(), so
> > remove it from all lock_release() calls and friends.
> >
> > Signed-off-by: Qian Cai <[email protected]>
> > ---
>
> Although this looks fine to me at a first glance, it might be slightly
> easier to manage if you hit {spin,rwlock,seqcount,mutex,rwsem}_release()
> first with coccinelle scripts, and then hack lock_release() as a final
> patch. That way it's easy to regenerate things if needed.

I am not sure if it worth the extra efforts where I have to retest it on all
architectures, and the patch is really simple, but I can certainly do that if
you insist.

I have just confirmed the patch [1] also applied correctly to the latest
mainline, so it might be the best time just for Linus to merge it directly so it
does not introduce build errors later on?

[1]

https://lore.kernel.org/lkml/[email protected]/

2019-09-20 19:57:58

by Will Deacon

Subject: Re: [PATCH -next] treewide: remove unused argument in lock_release()

On Fri, Sep 20, 2019 at 08:50:36AM -0400, Qian Cai wrote:
> On Fri, 2019-09-20 at 10:38 +0100, Will Deacon wrote:
> > On Thu, Sep 19, 2019 at 12:09:40PM -0400, Qian Cai wrote:
> > > Since the commit b4adfe8e05f1 ("locking/lockdep: Remove unused argument
> > > in __lock_release"), @nested is no longer used in lock_release(), so
> > > remove it from all lock_release() calls and friends.
> > >
> > > Signed-off-by: Qian Cai <[email protected]>
> > > ---
> >
> > Although this looks fine to me at a first glance, it might be slightly
> > easier to manage if you hit {spin,rwlock,seqcount,mutex,rwsem}_release()
> > first with coccinelle scripts, and then hack lock_release() as a final
> > patch. That way it's easy to regenerate things if needed.
>
> I am not sure if it worth the extra efforts where I have to retest it on all
> architectures, and the patch is really simple, but I can certainly do that if
> you insist.

I'm not insisting, just thought it might be easier to get it merged that
way. If you prefer to go with the big diff,

Acked-by: Will Deacon <[email protected]>

Will

2019-10-08 16:35:04

by Daniel Vetter

Subject: Re: [PATCH -next] treewide: remove unused argument in lock_release()

On Thu, Sep 19, 2019 at 12:09:40PM -0400, Qian Cai wrote:
> Since the commit b4adfe8e05f1 ("locking/lockdep: Remove unused argument
> in __lock_release"), @nested is no longer used in lock_release(), so
> remove it from all lock_release() calls and friends.
>
> Signed-off-by: Qian Cai <[email protected]>

Ack on the concept and for the drm parts (and feel free to keep the ack if
you inevitably have to respin this later on). Might result in some
conflicts, but welp we need to keep Linus busy :-)

Acked-by: Daniel Vetter <[email protected]>
> ---
> drivers/gpu/drm/drm_connector.c | 2 +-
> drivers/gpu/drm/i915/gem/i915_gem_shrinker.c | 6 +++---
> drivers/gpu/drm/i915/gt/intel_engine_pm.c | 2 +-
> drivers/gpu/drm/i915/i915_request.c | 2 +-
> drivers/tty/tty_ldsem.c | 8 ++++----
> fs/dcache.c | 2 +-
> fs/jbd2/transaction.c | 4 ++--
> fs/kernfs/dir.c | 4 ++--
> fs/ocfs2/dlmglue.c | 2 +-
> include/linux/jbd2.h | 2 +-
> include/linux/lockdep.h | 21 ++++++++++-----------
> include/linux/percpu-rwsem.h | 4 ++--
> include/linux/rcupdate.h | 2 +-
> include/linux/rwlock_api_smp.h | 16 ++++++++--------
> include/linux/seqlock.h | 4 ++--
> include/linux/spinlock_api_smp.h | 8 ++++----
> include/linux/ww_mutex.h | 2 +-
> include/net/sock.h | 2 +-
> kernel/bpf/stackmap.c | 2 +-
> kernel/cpu.c | 2 +-
> kernel/locking/lockdep.c | 3 +--
> kernel/locking/mutex.c | 4 ++--
> kernel/locking/rtmutex.c | 6 +++---
> kernel/locking/rwsem.c | 10 +++++-----
> kernel/printk/printk.c | 10 +++++-----
> kernel/sched/core.c | 2 +-
> lib/locking-selftest.c | 24 ++++++++++++------------
> mm/memcontrol.c | 2 +-
> net/core/sock.c | 2 +-
> tools/lib/lockdep/include/liblockdep/common.h | 3 +--
> tools/lib/lockdep/include/liblockdep/mutex.h | 2 +-
> tools/lib/lockdep/include/liblockdep/rwlock.h | 2 +-
> tools/lib/lockdep/preload.c | 16 ++++++++--------
> 33 files changed, 90 insertions(+), 93 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c
> index 4c766624b20d..4a8b2e5c2af6 100644
> --- a/drivers/gpu/drm/drm_connector.c
> +++ b/drivers/gpu/drm/drm_connector.c
> @@ -719,7 +719,7 @@ void drm_connector_list_iter_end(struct drm_connector_list_iter *iter)
> __drm_connector_put_safe(iter->conn);
> spin_unlock_irqrestore(&config->connector_list_lock, flags);
> }
> - lock_release(&connector_list_iter_dep_map, 0, _RET_IP_);
> + lock_release(&connector_list_iter_dep_map, _RET_IP_);
> }
> EXPORT_SYMBOL(drm_connector_list_iter_end);
>
> diff --git a/drivers/gpu/drm/i915/gem/i915_gem_shrinker.c b/drivers/gpu/drm/i915/gem/i915_gem_shrinker.c
> index edd21d14e64f..1a51b3598d63 100644
> --- a/drivers/gpu/drm/i915/gem/i915_gem_shrinker.c
> +++ b/drivers/gpu/drm/i915/gem/i915_gem_shrinker.c
> @@ -509,14 +509,14 @@ void i915_gem_shrinker_taints_mutex(struct drm_i915_private *i915,
> I915_MM_SHRINKER, 0, _RET_IP_);
>
> mutex_acquire(&mutex->dep_map, 0, 0, _RET_IP_);
> - mutex_release(&mutex->dep_map, 0, _RET_IP_);
> + mutex_release(&mutex->dep_map, _RET_IP_);
>
> - mutex_release(&i915->drm.struct_mutex.dep_map, 0, _RET_IP_);
> + mutex_release(&i915->drm.struct_mutex.dep_map, _RET_IP_);
>
> fs_reclaim_release(GFP_KERNEL);
>
> if (unlock)
> - mutex_release(&i915->drm.struct_mutex.dep_map, 0, _RET_IP_);
> + mutex_release(&i915->drm.struct_mutex.dep_map, _RET_IP_);
> }
>
> #define obj_to_i915(obj__) to_i915((obj__)->base.dev)
> diff --git a/drivers/gpu/drm/i915/gt/intel_engine_pm.c b/drivers/gpu/drm/i915/gt/intel_engine_pm.c
> index 65b5ca74b394..7f647243b3b9 100644
> --- a/drivers/gpu/drm/i915/gt/intel_engine_pm.c
> +++ b/drivers/gpu/drm/i915/gt/intel_engine_pm.c
> @@ -52,7 +52,7 @@ static inline unsigned long __timeline_mark_lock(struct intel_context *ce)
> static inline void __timeline_mark_unlock(struct intel_context *ce,
> unsigned long flags)
> {
> - mutex_release(&ce->timeline->mutex.dep_map, 0, _THIS_IP_);
> + mutex_release(&ce->timeline->mutex.dep_map, _THIS_IP_);
> local_irq_restore(flags);
> }
>
> diff --git a/drivers/gpu/drm/i915/i915_request.c b/drivers/gpu/drm/i915/i915_request.c
> index a53777dd371c..e1f1be4d0531 100644
> --- a/drivers/gpu/drm/i915/i915_request.c
> +++ b/drivers/gpu/drm/i915/i915_request.c
> @@ -1456,7 +1456,7 @@ long i915_request_wait(struct i915_request *rq,
> dma_fence_remove_callback(&rq->fence, &wait.cb);
>
> out:
> - mutex_release(&rq->engine->gt->reset.mutex.dep_map, 0, _THIS_IP_);
> + mutex_release(&rq->engine->gt->reset.mutex.dep_map, _THIS_IP_);
> trace_i915_request_wait_end(rq);
> return timeout;
> }
> diff --git a/drivers/tty/tty_ldsem.c b/drivers/tty/tty_ldsem.c
> index 60ff236a3d63..ce8291053af3 100644
> --- a/drivers/tty/tty_ldsem.c
> +++ b/drivers/tty/tty_ldsem.c
> @@ -303,7 +303,7 @@ static int __ldsem_down_read_nested(struct ld_semaphore *sem,
> if (count <= 0) {
> lock_contended(&sem->dep_map, _RET_IP_);
> if (!down_read_failed(sem, count, timeout)) {
> - rwsem_release(&sem->dep_map, 1, _RET_IP_);
> + rwsem_release(&sem->dep_map, _RET_IP_);
> return 0;
> }
> }
> @@ -322,7 +322,7 @@ static int __ldsem_down_write_nested(struct ld_semaphore *sem,
> if ((count & LDSEM_ACTIVE_MASK) != LDSEM_ACTIVE_BIAS) {
> lock_contended(&sem->dep_map, _RET_IP_);
> if (!down_write_failed(sem, count, timeout)) {
> - rwsem_release(&sem->dep_map, 1, _RET_IP_);
> + rwsem_release(&sem->dep_map, _RET_IP_);
> return 0;
> }
> }
> @@ -390,7 +390,7 @@ void ldsem_up_read(struct ld_semaphore *sem)
> {
> long count;
>
> - rwsem_release(&sem->dep_map, 1, _RET_IP_);
> + rwsem_release(&sem->dep_map, _RET_IP_);
>
> count = atomic_long_add_return(-LDSEM_READ_BIAS, &sem->count);
> if (count < 0 && (count & LDSEM_ACTIVE_MASK) == 0)
> @@ -404,7 +404,7 @@ void ldsem_up_write(struct ld_semaphore *sem)
> {
> long count;
>
> - rwsem_release(&sem->dep_map, 1, _RET_IP_);
> + rwsem_release(&sem->dep_map, _RET_IP_);
>
> count = atomic_long_add_return(-LDSEM_WRITE_BIAS, &sem->count);
> if (count < 0)
> diff --git a/fs/dcache.c b/fs/dcache.c
> index e88cf0554e65..f7931b682a0d 100644
> --- a/fs/dcache.c
> +++ b/fs/dcache.c
> @@ -1319,7 +1319,7 @@ static void d_walk(struct dentry *parent, void *data,
>
> if (!list_empty(&dentry->d_subdirs)) {
> spin_unlock(&this_parent->d_lock);
> - spin_release(&dentry->d_lock.dep_map, 1, _RET_IP_);
> + spin_release(&dentry->d_lock.dep_map, _RET_IP_);
> this_parent = dentry;
> spin_acquire(&this_parent->d_lock.dep_map, 0, 1, _RET_IP_);
> goto repeat;
> diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c
> index bee8498d7792..b25ebdcabfa3 100644
> --- a/fs/jbd2/transaction.c
> +++ b/fs/jbd2/transaction.c
> @@ -713,7 +713,7 @@ int jbd2__journal_restart(handle_t *handle, int nblocks, gfp_t gfp_mask)
> if (need_to_start)
> jbd2_log_start_commit(journal, tid);
>
> - rwsem_release(&journal->j_trans_commit_map, 1, _THIS_IP_);
> + rwsem_release(&journal->j_trans_commit_map, _THIS_IP_);
> handle->h_buffer_credits = nblocks;
> /*
> * Restore the original nofs context because the journal restart
> @@ -1848,7 +1848,7 @@ int jbd2_journal_stop(handle_t *handle)
> wake_up(&journal->j_wait_transaction_locked);
> }
>
> - rwsem_release(&journal->j_trans_commit_map, 1, _THIS_IP_);
> + rwsem_release(&journal->j_trans_commit_map, _THIS_IP_);
>
> if (wait_for_commit)
> err = jbd2_log_wait_commit(journal, tid);
> diff --git a/fs/kernfs/dir.c b/fs/kernfs/dir.c
> index 6ebae6bbe6a5..c45b82feac9a 100644
> --- a/fs/kernfs/dir.c
> +++ b/fs/kernfs/dir.c
> @@ -438,7 +438,7 @@ void kernfs_put_active(struct kernfs_node *kn)
> return;
>
> if (kernfs_lockdep(kn))
> - rwsem_release(&kn->dep_map, 1, _RET_IP_);
> + rwsem_release(&kn->dep_map, _RET_IP_);
> v = atomic_dec_return(&kn->active);
> if (likely(v != KN_DEACTIVATED_BIAS))
> return;
> @@ -476,7 +476,7 @@ static void kernfs_drain(struct kernfs_node *kn)
>
> if (kernfs_lockdep(kn)) {
> lock_acquired(&kn->dep_map, _RET_IP_);
> - rwsem_release(&kn->dep_map, 1, _RET_IP_);
> + rwsem_release(&kn->dep_map, _RET_IP_);
> }
>
> kernfs_drain_open_files(kn);
> diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c
> index ad594fef2ab0..71975b9b142c 100644
> --- a/fs/ocfs2/dlmglue.c
> +++ b/fs/ocfs2/dlmglue.c
> @@ -1687,7 +1687,7 @@ static void __ocfs2_cluster_unlock(struct ocfs2_super *osb,
> spin_unlock_irqrestore(&lockres->l_lock, flags);
> #ifdef CONFIG_DEBUG_LOCK_ALLOC
> if (lockres->l_lockdep_map.key != NULL)
> - rwsem_release(&lockres->l_lockdep_map, 1, caller_ip);
> + rwsem_release(&lockres->l_lockdep_map, caller_ip);
> #endif
> }
>
> diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h
> index 603fbc4e2f70..564793c24d12 100644
> --- a/include/linux/jbd2.h
> +++ b/include/linux/jbd2.h
> @@ -1170,7 +1170,7 @@ struct journal_s
> #define jbd2_might_wait_for_commit(j) \
> do { \
> rwsem_acquire(&j->j_trans_commit_map, 0, 0, _THIS_IP_); \
> - rwsem_release(&j->j_trans_commit_map, 1, _THIS_IP_); \
> + rwsem_release(&j->j_trans_commit_map, _THIS_IP_); \
> } while (0)
>
> /* journal feature predicate functions */
> diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h
> index b8a835fd611b..c50d01ef1414 100644
> --- a/include/linux/lockdep.h
> +++ b/include/linux/lockdep.h
> @@ -349,8 +349,7 @@ extern void lock_acquire(struct lockdep_map *lock, unsigned int subclass,
> int trylock, int read, int check,
> struct lockdep_map *nest_lock, unsigned long ip);
>
> -extern void lock_release(struct lockdep_map *lock, int nested,
> - unsigned long ip);
> +extern void lock_release(struct lockdep_map *lock, unsigned long ip);
>
> /*
> * Same "read" as for lock_acquire(), except -1 means any.
> @@ -428,7 +427,7 @@ static inline void lockdep_set_selftest_task(struct task_struct *task)
> }
>
> # define lock_acquire(l, s, t, r, c, n, i) do { } while (0)
> -# define lock_release(l, n, i) do { } while (0)
> +# define lock_release(l, i) do { } while (0)
> # define lock_downgrade(l, i) do { } while (0)
> # define lock_set_class(l, n, k, s, i) do { } while (0)
> # define lock_set_subclass(l, s, i) do { } while (0)
> @@ -591,42 +590,42 @@ static inline void print_irqtrace_events(struct task_struct *curr)
>
> #define spin_acquire(l, s, t, i) lock_acquire_exclusive(l, s, t, NULL, i)
> #define spin_acquire_nest(l, s, t, n, i) lock_acquire_exclusive(l, s, t, n, i)
> -#define spin_release(l, n, i) lock_release(l, n, i)
> +#define spin_release(l, i) lock_release(l, i)
>
> #define rwlock_acquire(l, s, t, i) lock_acquire_exclusive(l, s, t, NULL, i)
> #define rwlock_acquire_read(l, s, t, i) lock_acquire_shared_recursive(l, s, t, NULL, i)
> -#define rwlock_release(l, n, i) lock_release(l, n, i)
> +#define rwlock_release(l, i) lock_release(l, i)
>
> #define seqcount_acquire(l, s, t, i) lock_acquire_exclusive(l, s, t, NULL, i)
> #define seqcount_acquire_read(l, s, t, i) lock_acquire_shared_recursive(l, s, t, NULL, i)
> -#define seqcount_release(l, n, i) lock_release(l, n, i)
> +#define seqcount_release(l, i) lock_release(l, i)
>
> #define mutex_acquire(l, s, t, i) lock_acquire_exclusive(l, s, t, NULL, i)
> #define mutex_acquire_nest(l, s, t, n, i) lock_acquire_exclusive(l, s, t, n, i)
> -#define mutex_release(l, n, i) lock_release(l, n, i)
> +#define mutex_release(l, i) lock_release(l, i)
>
> #define rwsem_acquire(l, s, t, i) lock_acquire_exclusive(l, s, t, NULL, i)
> #define rwsem_acquire_nest(l, s, t, n, i) lock_acquire_exclusive(l, s, t, n, i)
> #define rwsem_acquire_read(l, s, t, i) lock_acquire_shared(l, s, t, NULL, i)
> -#define rwsem_release(l, n, i) lock_release(l, n, i)
> +#define rwsem_release(l, i) lock_release(l, i)
>
> #define lock_map_acquire(l) lock_acquire_exclusive(l, 0, 0, NULL, _THIS_IP_)
> #define lock_map_acquire_read(l) lock_acquire_shared_recursive(l, 0, 0, NULL, _THIS_IP_)
> #define lock_map_acquire_tryread(l) lock_acquire_shared_recursive(l, 0, 1, NULL, _THIS_IP_)
> -#define lock_map_release(l) lock_release(l, 1, _THIS_IP_)
> +#define lock_map_release(l) lock_release(l, _THIS_IP_)
>
> #ifdef CONFIG_PROVE_LOCKING
> # define might_lock(lock) \
> do { \
> typecheck(struct lockdep_map *, &(lock)->dep_map); \
> lock_acquire(&(lock)->dep_map, 0, 0, 0, 1, NULL, _THIS_IP_); \
> - lock_release(&(lock)->dep_map, 0, _THIS_IP_); \
> + lock_release(&(lock)->dep_map, _THIS_IP_); \
> } while (0)
> # define might_lock_read(lock) \
> do { \
> typecheck(struct lockdep_map *, &(lock)->dep_map); \
> lock_acquire(&(lock)->dep_map, 0, 0, 1, 1, NULL, _THIS_IP_); \
> - lock_release(&(lock)->dep_map, 0, _THIS_IP_); \
> + lock_release(&(lock)->dep_map, _THIS_IP_); \
> } while (0)
>
> #define lockdep_assert_irqs_enabled() do { \
> diff --git a/include/linux/percpu-rwsem.h b/include/linux/percpu-rwsem.h
> index 3998cdf9cd14..ad2ca2a89d5b 100644
> --- a/include/linux/percpu-rwsem.h
> +++ b/include/linux/percpu-rwsem.h
> @@ -93,7 +93,7 @@ static inline void percpu_up_read(struct percpu_rw_semaphore *sem)
> __percpu_up_read(sem); /* Unconditional memory barrier */
> preempt_enable();
>
> - rwsem_release(&sem->rw_sem.dep_map, 1, _RET_IP_);
> + rwsem_release(&sem->rw_sem.dep_map, _RET_IP_);
> }
>
> extern void percpu_down_write(struct percpu_rw_semaphore *);
> @@ -118,7 +118,7 @@ extern int __percpu_init_rwsem(struct percpu_rw_semaphore *,
> static inline void percpu_rwsem_release(struct percpu_rw_semaphore *sem,
> bool read, unsigned long ip)
> {
> - lock_release(&sem->rw_sem.dep_map, 1, ip);
> + lock_release(&sem->rw_sem.dep_map, ip);
> #ifdef CONFIG_RWSEM_SPIN_ON_OWNER
> if (!read)
> atomic_long_set(&sem->rw_sem.owner, RWSEM_OWNER_UNKNOWN);
> diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h
> index 75a2eded7aa2..269b31eab3d6 100644
> --- a/include/linux/rcupdate.h
> +++ b/include/linux/rcupdate.h
> @@ -210,7 +210,7 @@ static inline void rcu_lock_acquire(struct lockdep_map *map)
>
> static inline void rcu_lock_release(struct lockdep_map *map)
> {
> - lock_release(map, 1, _THIS_IP_);
> + lock_release(map, _THIS_IP_);
> }
>
> extern struct lockdep_map rcu_lock_map;
> diff --git a/include/linux/rwlock_api_smp.h b/include/linux/rwlock_api_smp.h
> index 86ebb4bf9c6e..abfb53ab11be 100644
> --- a/include/linux/rwlock_api_smp.h
> +++ b/include/linux/rwlock_api_smp.h
> @@ -215,14 +215,14 @@ static inline void __raw_write_lock(rwlock_t *lock)
>
> static inline void __raw_write_unlock(rwlock_t *lock)
> {
> - rwlock_release(&lock->dep_map, 1, _RET_IP_);
> + rwlock_release(&lock->dep_map, _RET_IP_);
> do_raw_write_unlock(lock);
> preempt_enable();
> }
>
> static inline void __raw_read_unlock(rwlock_t *lock)
> {
> - rwlock_release(&lock->dep_map, 1, _RET_IP_);
> + rwlock_release(&lock->dep_map, _RET_IP_);
> do_raw_read_unlock(lock);
> preempt_enable();
> }
> @@ -230,7 +230,7 @@ static inline void __raw_read_unlock(rwlock_t *lock)
> static inline void
> __raw_read_unlock_irqrestore(rwlock_t *lock, unsigned long flags)
> {
> - rwlock_release(&lock->dep_map, 1, _RET_IP_);
> + rwlock_release(&lock->dep_map, _RET_IP_);
> do_raw_read_unlock(lock);
> local_irq_restore(flags);
> preempt_enable();
> @@ -238,7 +238,7 @@ static inline void __raw_read_unlock(rwlock_t *lock)
>
> static inline void __raw_read_unlock_irq(rwlock_t *lock)
> {
> - rwlock_release(&lock->dep_map, 1, _RET_IP_);
> + rwlock_release(&lock->dep_map, _RET_IP_);
> do_raw_read_unlock(lock);
> local_irq_enable();
> preempt_enable();
> @@ -246,7 +246,7 @@ static inline void __raw_read_unlock_irq(rwlock_t *lock)
>
> static inline void __raw_read_unlock_bh(rwlock_t *lock)
> {
> - rwlock_release(&lock->dep_map, 1, _RET_IP_);
> + rwlock_release(&lock->dep_map, _RET_IP_);
> do_raw_read_unlock(lock);
> __local_bh_enable_ip(_RET_IP_, SOFTIRQ_LOCK_OFFSET);
> }
> @@ -254,7 +254,7 @@ static inline void __raw_read_unlock_bh(rwlock_t *lock)
> static inline void __raw_write_unlock_irqrestore(rwlock_t *lock,
> unsigned long flags)
> {
> - rwlock_release(&lock->dep_map, 1, _RET_IP_);
> + rwlock_release(&lock->dep_map, _RET_IP_);
> do_raw_write_unlock(lock);
> local_irq_restore(flags);
> preempt_enable();
> @@ -262,7 +262,7 @@ static inline void __raw_write_unlock_irqrestore(rwlock_t *lock,
>
> static inline void __raw_write_unlock_irq(rwlock_t *lock)
> {
> - rwlock_release(&lock->dep_map, 1, _RET_IP_);
> + rwlock_release(&lock->dep_map, _RET_IP_);
> do_raw_write_unlock(lock);
> local_irq_enable();
> preempt_enable();
> @@ -270,7 +270,7 @@ static inline void __raw_write_unlock_irq(rwlock_t *lock)
>
> static inline void __raw_write_unlock_bh(rwlock_t *lock)
> {
> - rwlock_release(&lock->dep_map, 1, _RET_IP_);
> + rwlock_release(&lock->dep_map, _RET_IP_);
> do_raw_write_unlock(lock);
> __local_bh_enable_ip(_RET_IP_, SOFTIRQ_LOCK_OFFSET);
> }
> diff --git a/include/linux/seqlock.h b/include/linux/seqlock.h
> index bcf4cf26b8c8..0491d963d47e 100644
> --- a/include/linux/seqlock.h
> +++ b/include/linux/seqlock.h
> @@ -79,7 +79,7 @@ static inline void seqcount_lockdep_reader_access(const seqcount_t *s)
>
> local_irq_save(flags);
> seqcount_acquire_read(&l->dep_map, 0, 0, _RET_IP_);
> - seqcount_release(&l->dep_map, 1, _RET_IP_);
> + seqcount_release(&l->dep_map, _RET_IP_);
> local_irq_restore(flags);
> }
>
> @@ -384,7 +384,7 @@ static inline void write_seqcount_begin(seqcount_t *s)
>
> static inline void write_seqcount_end(seqcount_t *s)
> {
> - seqcount_release(&s->dep_map, 1, _RET_IP_);
> + seqcount_release(&s->dep_map, _RET_IP_);
> raw_write_seqcount_end(s);
> }
>
> diff --git a/include/linux/spinlock_api_smp.h b/include/linux/spinlock_api_smp.h
> index b762eaba4cdf..19a9be9d97ee 100644
> --- a/include/linux/spinlock_api_smp.h
> +++ b/include/linux/spinlock_api_smp.h
> @@ -147,7 +147,7 @@ static inline void __raw_spin_lock(raw_spinlock_t *lock)
>
> static inline void __raw_spin_unlock(raw_spinlock_t *lock)
> {
> - spin_release(&lock->dep_map, 1, _RET_IP_);
> + spin_release(&lock->dep_map, _RET_IP_);
> do_raw_spin_unlock(lock);
> preempt_enable();
> }
> @@ -155,7 +155,7 @@ static inline void __raw_spin_unlock(raw_spinlock_t *lock)
> static inline void __raw_spin_unlock_irqrestore(raw_spinlock_t *lock,
> unsigned long flags)
> {
> - spin_release(&lock->dep_map, 1, _RET_IP_);
> + spin_release(&lock->dep_map, _RET_IP_);
> do_raw_spin_unlock(lock);
> local_irq_restore(flags);
> preempt_enable();
> @@ -163,7 +163,7 @@ static inline void __raw_spin_unlock_irqrestore(raw_spinlock_t *lock,
>
> static inline void __raw_spin_unlock_irq(raw_spinlock_t *lock)
> {
> - spin_release(&lock->dep_map, 1, _RET_IP_);
> + spin_release(&lock->dep_map, _RET_IP_);
> do_raw_spin_unlock(lock);
> local_irq_enable();
> preempt_enable();
> @@ -171,7 +171,7 @@ static inline void __raw_spin_unlock_irq(raw_spinlock_t *lock)
>
> static inline void __raw_spin_unlock_bh(raw_spinlock_t *lock)
> {
> - spin_release(&lock->dep_map, 1, _RET_IP_);
> + spin_release(&lock->dep_map, _RET_IP_);
> do_raw_spin_unlock(lock);
> __local_bh_enable_ip(_RET_IP_, SOFTIRQ_LOCK_OFFSET);
> }
> diff --git a/include/linux/ww_mutex.h b/include/linux/ww_mutex.h
> index 3af7c0e03be5..d7554252404c 100644
> --- a/include/linux/ww_mutex.h
> +++ b/include/linux/ww_mutex.h
> @@ -182,7 +182,7 @@ static inline void ww_acquire_done(struct ww_acquire_ctx *ctx)
> static inline void ww_acquire_fini(struct ww_acquire_ctx *ctx)
> {
> #ifdef CONFIG_DEBUG_MUTEXES
> - mutex_release(&ctx->dep_map, 0, _THIS_IP_);
> + mutex_release(&ctx->dep_map, _THIS_IP_);
>
> DEBUG_LOCKS_WARN_ON(ctx->acquired);
> if (!IS_ENABLED(CONFIG_PROVE_LOCKING))
> diff --git a/include/net/sock.h b/include/net/sock.h
> index 2c53f1a1d905..e46db0c846d2 100644
> --- a/include/net/sock.h
> +++ b/include/net/sock.h
> @@ -1484,7 +1484,7 @@ static inline void sock_release_ownership(struct sock *sk)
> sk->sk_lock.owned = 0;
>
> /* The sk_lock has mutex_unlock() semantics: */
> - mutex_release(&sk->sk_lock.dep_map, 1, _RET_IP_);
> + mutex_release(&sk->sk_lock.dep_map, _RET_IP_);
> }
> }
>
> diff --git a/kernel/bpf/stackmap.c b/kernel/bpf/stackmap.c
> index 052580c33d26..dcfe2d37ad15 100644
> --- a/kernel/bpf/stackmap.c
> +++ b/kernel/bpf/stackmap.c
> @@ -338,7 +338,7 @@ static void stack_map_get_build_id_offset(struct bpf_stack_build_id *id_offs,
> * up_read_non_owner(). The rwsem_release() is called
> * here to release the lock from lockdep's perspective.
> */
> - rwsem_release(&current->mm->mmap_sem.dep_map, 1, _RET_IP_);
> + rwsem_release(&current->mm->mmap_sem.dep_map, _RET_IP_);
> }
> }
>
> diff --git a/kernel/cpu.c b/kernel/cpu.c
> index e1967e9eddc2..97ed88e0cf72 100644
> --- a/kernel/cpu.c
> +++ b/kernel/cpu.c
> @@ -336,7 +336,7 @@ static void lockdep_acquire_cpus_lock(void)
>
> static void lockdep_release_cpus_lock(void)
> {
> - rwsem_release(&cpu_hotplug_lock.rw_sem.dep_map, 1, _THIS_IP_);
> + rwsem_release(&cpu_hotplug_lock.rw_sem.dep_map, _THIS_IP_);
> }
>
> /*
> diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
> index 233459c03b5a..8123518f9045 100644
> --- a/kernel/locking/lockdep.c
> +++ b/kernel/locking/lockdep.c
> @@ -4491,8 +4491,7 @@ void lock_acquire(struct lockdep_map *lock, unsigned int subclass,
> }
> EXPORT_SYMBOL_GPL(lock_acquire);
>
> -void lock_release(struct lockdep_map *lock, int nested,
> - unsigned long ip)
> +void lock_release(struct lockdep_map *lock, unsigned long ip)
> {
> unsigned long flags;
>
> diff --git a/kernel/locking/mutex.c b/kernel/locking/mutex.c
> index 468a9b8422e3..5352ce50a97e 100644
> --- a/kernel/locking/mutex.c
> +++ b/kernel/locking/mutex.c
> @@ -1091,7 +1091,7 @@ void __sched ww_mutex_unlock(struct ww_mutex *lock)
> err_early_kill:
> spin_unlock(&lock->wait_lock);
> debug_mutex_free_waiter(&waiter);
> - mutex_release(&lock->dep_map, 1, ip);
> + mutex_release(&lock->dep_map, ip);
> preempt_enable();
> return ret;
> }
> @@ -1225,7 +1225,7 @@ static noinline void __sched __mutex_unlock_slowpath(struct mutex *lock, unsigne
> DEFINE_WAKE_Q(wake_q);
> unsigned long owner;
>
> - mutex_release(&lock->dep_map, 1, ip);
> + mutex_release(&lock->dep_map, ip);
>
> /*
> * Release the lock before (potentially) taking the spinlock such that
> diff --git a/kernel/locking/rtmutex.c b/kernel/locking/rtmutex.c
> index 2874bf556162..851bbb10819d 100644
> --- a/kernel/locking/rtmutex.c
> +++ b/kernel/locking/rtmutex.c
> @@ -1517,7 +1517,7 @@ int __sched rt_mutex_lock_interruptible(struct rt_mutex *lock)
> mutex_acquire(&lock->dep_map, 0, 0, _RET_IP_);
> ret = rt_mutex_fastlock(lock, TASK_INTERRUPTIBLE, rt_mutex_slowlock);
> if (ret)
> - mutex_release(&lock->dep_map, 1, _RET_IP_);
> + mutex_release(&lock->dep_map, _RET_IP_);
>
> return ret;
> }
> @@ -1561,7 +1561,7 @@ int __sched __rt_mutex_futex_trylock(struct rt_mutex *lock)
> RT_MUTEX_MIN_CHAINWALK,
> rt_mutex_slowlock);
> if (ret)
> - mutex_release(&lock->dep_map, 1, _RET_IP_);
> + mutex_release(&lock->dep_map, _RET_IP_);
>
> return ret;
> }
> @@ -1600,7 +1600,7 @@ int __sched rt_mutex_trylock(struct rt_mutex *lock)
> */
> void __sched rt_mutex_unlock(struct rt_mutex *lock)
> {
> - mutex_release(&lock->dep_map, 1, _RET_IP_);
> + mutex_release(&lock->dep_map, _RET_IP_);
> rt_mutex_fastunlock(lock, rt_mutex_slowunlock);
> }
> EXPORT_SYMBOL_GPL(rt_mutex_unlock);
> diff --git a/kernel/locking/rwsem.c b/kernel/locking/rwsem.c
> index eef04551eae7..44e68761f432 100644
> --- a/kernel/locking/rwsem.c
> +++ b/kernel/locking/rwsem.c
> @@ -1504,7 +1504,7 @@ int __sched down_read_killable(struct rw_semaphore *sem)
> rwsem_acquire_read(&sem->dep_map, 0, 0, _RET_IP_);
>
> if (LOCK_CONTENDED_RETURN(sem, __down_read_trylock, __down_read_killable)) {
> - rwsem_release(&sem->dep_map, 1, _RET_IP_);
> + rwsem_release(&sem->dep_map, _RET_IP_);
> return -EINTR;
> }
>
> @@ -1546,7 +1546,7 @@ int __sched down_write_killable(struct rw_semaphore *sem)
>
> if (LOCK_CONTENDED_RETURN(sem, __down_write_trylock,
> __down_write_killable)) {
> - rwsem_release(&sem->dep_map, 1, _RET_IP_);
> + rwsem_release(&sem->dep_map, _RET_IP_);
> return -EINTR;
> }
>
> @@ -1573,7 +1573,7 @@ int down_write_trylock(struct rw_semaphore *sem)
> */
> void up_read(struct rw_semaphore *sem)
> {
> - rwsem_release(&sem->dep_map, 1, _RET_IP_);
> + rwsem_release(&sem->dep_map, _RET_IP_);
> __up_read(sem);
> }
> EXPORT_SYMBOL(up_read);
> @@ -1583,7 +1583,7 @@ void up_read(struct rw_semaphore *sem)
> */
> void up_write(struct rw_semaphore *sem)
> {
> - rwsem_release(&sem->dep_map, 1, _RET_IP_);
> + rwsem_release(&sem->dep_map, _RET_IP_);
> __up_write(sem);
> }
> EXPORT_SYMBOL(up_write);
> @@ -1639,7 +1639,7 @@ int __sched down_write_killable_nested(struct rw_semaphore *sem, int subclass)
>
> if (LOCK_CONTENDED_RETURN(sem, __down_write_trylock,
> __down_write_killable)) {
> - rwsem_release(&sem->dep_map, 1, _RET_IP_);
> + rwsem_release(&sem->dep_map, _RET_IP_);
> return -EINTR;
> }
>
> diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
> index ca65327a6de8..c8be5a0f5259 100644
> --- a/kernel/printk/printk.c
> +++ b/kernel/printk/printk.c
> @@ -248,7 +248,7 @@ static void __up_console_sem(unsigned long ip)
> {
> unsigned long flags;
>
> - mutex_release(&console_lock_dep_map, 1, ip);
> + mutex_release(&console_lock_dep_map, ip);
>
> printk_safe_enter_irqsave(flags);
> up(&console_sem);
> @@ -1679,20 +1679,20 @@ static int console_lock_spinning_disable_and_check(void)
> raw_spin_unlock(&console_owner_lock);
>
> if (!waiter) {
> - spin_release(&console_owner_dep_map, 1, _THIS_IP_);
> + spin_release(&console_owner_dep_map, _THIS_IP_);
> return 0;
> }
>
> /* The waiter is now free to continue */
> WRITE_ONCE(console_waiter, false);
>
> - spin_release(&console_owner_dep_map, 1, _THIS_IP_);
> + spin_release(&console_owner_dep_map, _THIS_IP_);
>
> /*
> * Hand off console_lock to waiter. The waiter will perform
> * the up(). After this, the waiter is the console_lock owner.
> */
> - mutex_release(&console_lock_dep_map, 1, _THIS_IP_);
> + mutex_release(&console_lock_dep_map, _THIS_IP_);
> return 1;
> }
>
> @@ -1746,7 +1746,7 @@ static int console_trylock_spinning(void)
> /* Owner will clear console_waiter on hand off */
> while (READ_ONCE(console_waiter))
> cpu_relax();
> - spin_release(&console_owner_dep_map, 1, _THIS_IP_);
> + spin_release(&console_owner_dep_map, _THIS_IP_);
>
> printk_safe_exit_irqrestore(flags);
> /*
> diff --git a/kernel/sched/core.c b/kernel/sched/core.c
> index f9a1346a5fa9..f845693e8e75 100644
> --- a/kernel/sched/core.c
> +++ b/kernel/sched/core.c
> @@ -3105,7 +3105,7 @@ static inline void finish_task(struct task_struct *prev)
> * do an early lockdep release here:
> */
> rq_unpin_lock(rq, rf);
> - spin_release(&rq->lock.dep_map, 1, _THIS_IP_);
> + spin_release(&rq->lock.dep_map, _THIS_IP_);
> #ifdef CONFIG_DEBUG_SPINLOCK
> /* this is a valid case when another task releases the spinlock */
> rq->lock.owner = next;
> diff --git a/lib/locking-selftest.c b/lib/locking-selftest.c
> index a1705545e6ac..14f44f59e733 100644
> --- a/lib/locking-selftest.c
> +++ b/lib/locking-selftest.c
> @@ -1475,7 +1475,7 @@ static void ww_test_edeadlk_normal(void)
>
> mutex_lock(&o2.base);
> o2.ctx = &t2;
> - mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
> + mutex_release(&o2.base.dep_map, _THIS_IP_);
>
> WWAI(&t);
> t2 = t;
> @@ -1500,7 +1500,7 @@ static void ww_test_edeadlk_normal_slow(void)
> int ret;
>
> mutex_lock(&o2.base);
> - mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
> + mutex_release(&o2.base.dep_map, _THIS_IP_);
> o2.ctx = &t2;
>
> WWAI(&t);
> @@ -1527,7 +1527,7 @@ static void ww_test_edeadlk_no_unlock(void)
>
> mutex_lock(&o2.base);
> o2.ctx = &t2;
> - mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
> + mutex_release(&o2.base.dep_map, _THIS_IP_);
>
> WWAI(&t);
> t2 = t;
> @@ -1551,7 +1551,7 @@ static void ww_test_edeadlk_no_unlock_slow(void)
> int ret;
>
> mutex_lock(&o2.base);
> - mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
> + mutex_release(&o2.base.dep_map, _THIS_IP_);
> o2.ctx = &t2;
>
> WWAI(&t);
> @@ -1576,7 +1576,7 @@ static void ww_test_edeadlk_acquire_more(void)
> int ret;
>
> mutex_lock(&o2.base);
> - mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
> + mutex_release(&o2.base.dep_map, _THIS_IP_);
> o2.ctx = &t2;
>
> WWAI(&t);
> @@ -1597,7 +1597,7 @@ static void ww_test_edeadlk_acquire_more_slow(void)
> int ret;
>
> mutex_lock(&o2.base);
> - mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
> + mutex_release(&o2.base.dep_map, _THIS_IP_);
> o2.ctx = &t2;
>
> WWAI(&t);
> @@ -1618,11 +1618,11 @@ static void ww_test_edeadlk_acquire_more_edeadlk(void)
> int ret;
>
> mutex_lock(&o2.base);
> - mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
> + mutex_release(&o2.base.dep_map, _THIS_IP_);
> o2.ctx = &t2;
>
> mutex_lock(&o3.base);
> - mutex_release(&o3.base.dep_map, 1, _THIS_IP_);
> + mutex_release(&o3.base.dep_map, _THIS_IP_);
> o3.ctx = &t2;
>
> WWAI(&t);
> @@ -1644,11 +1644,11 @@ static void ww_test_edeadlk_acquire_more_edeadlk_slow(void)
> int ret;
>
> mutex_lock(&o2.base);
> - mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
> + mutex_release(&o2.base.dep_map, _THIS_IP_);
> o2.ctx = &t2;
>
> mutex_lock(&o3.base);
> - mutex_release(&o3.base.dep_map, 1, _THIS_IP_);
> + mutex_release(&o3.base.dep_map, _THIS_IP_);
> o3.ctx = &t2;
>
> WWAI(&t);
> @@ -1669,7 +1669,7 @@ static void ww_test_edeadlk_acquire_wrong(void)
> int ret;
>
> mutex_lock(&o2.base);
> - mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
> + mutex_release(&o2.base.dep_map, _THIS_IP_);
> o2.ctx = &t2;
>
> WWAI(&t);
> @@ -1694,7 +1694,7 @@ static void ww_test_edeadlk_acquire_wrong_slow(void)
> int ret;
>
> mutex_lock(&o2.base);
> - mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
> + mutex_release(&o2.base.dep_map, _THIS_IP_);
> o2.ctx = &t2;
>
> WWAI(&t);
> diff --git a/mm/memcontrol.c b/mm/memcontrol.c
> index 1c4c08b45e44..3956ab6dba14 100644
> --- a/mm/memcontrol.c
> +++ b/mm/memcontrol.c
> @@ -1800,7 +1800,7 @@ static void mem_cgroup_oom_unlock(struct mem_cgroup *memcg)
> struct mem_cgroup *iter;
>
> spin_lock(&memcg_oom_lock);
> - mutex_release(&memcg_oom_lock_dep_map, 1, _RET_IP_);
> + mutex_release(&memcg_oom_lock_dep_map, _RET_IP_);
> for_each_mem_cgroup_tree(iter, memcg)
> iter->oom_lock = false;
> spin_unlock(&memcg_oom_lock);
> diff --git a/net/core/sock.c b/net/core/sock.c
> index 07863edbe6fc..a988e70cdac5 100644
> --- a/net/core/sock.c
> +++ b/net/core/sock.c
> @@ -521,7 +521,7 @@ int __sk_receive_skb(struct sock *sk, struct sk_buff *skb,
>
> rc = sk_backlog_rcv(sk, skb);
>
> - mutex_release(&sk->sk_lock.dep_map, 1, _RET_IP_);
> + mutex_release(&sk->sk_lock.dep_map, _RET_IP_);
> } else if (sk_add_backlog(sk, skb, sk->sk_rcvbuf)) {
> bh_unlock_sock(sk);
> atomic_inc(&sk->sk_drops);
> diff --git a/tools/lib/lockdep/include/liblockdep/common.h b/tools/lib/lockdep/include/liblockdep/common.h
> index a81d91d4fc78..a6d7ee5f18ba 100644
> --- a/tools/lib/lockdep/include/liblockdep/common.h
> +++ b/tools/lib/lockdep/include/liblockdep/common.h
> @@ -42,8 +42,7 @@ void lockdep_init_map(struct lockdep_map *lock, const char *name,
> void lock_acquire(struct lockdep_map *lock, unsigned int subclass,
> int trylock, int read, int check,
> struct lockdep_map *nest_lock, unsigned long ip);
> -void lock_release(struct lockdep_map *lock, int nested,
> - unsigned long ip);
> +void lock_release(struct lockdep_map *lock, unsigned long ip);
> void lockdep_reset_lock(struct lockdep_map *lock);
> void lockdep_register_key(struct lock_class_key *key);
> void lockdep_unregister_key(struct lock_class_key *key);
> diff --git a/tools/lib/lockdep/include/liblockdep/mutex.h b/tools/lib/lockdep/include/liblockdep/mutex.h
> index 783dd0df06f9..bd106b82759b 100644
> --- a/tools/lib/lockdep/include/liblockdep/mutex.h
> +++ b/tools/lib/lockdep/include/liblockdep/mutex.h
> @@ -42,7 +42,7 @@ static inline int liblockdep_pthread_mutex_lock(liblockdep_pthread_mutex_t *lock
>
> static inline int liblockdep_pthread_mutex_unlock(liblockdep_pthread_mutex_t *lock)
> {
> - lock_release(&lock->dep_map, 0, (unsigned long)_RET_IP_);
> + lock_release(&lock->dep_map, (unsigned long)_RET_IP_);
> return pthread_mutex_unlock(&lock->mutex);
> }
>
> diff --git a/tools/lib/lockdep/include/liblockdep/rwlock.h b/tools/lib/lockdep/include/liblockdep/rwlock.h
> index 365762e3a1ea..6d5d2932bf4d 100644
> --- a/tools/lib/lockdep/include/liblockdep/rwlock.h
> +++ b/tools/lib/lockdep/include/liblockdep/rwlock.h
> @@ -44,7 +44,7 @@ static inline int liblockdep_pthread_rwlock_rdlock(liblockdep_pthread_rwlock_t *
>
> static inline int liblockdep_pthread_rwlock_unlock(liblockdep_pthread_rwlock_t *lock)
> {
> - lock_release(&lock->dep_map, 0, (unsigned long)_RET_IP_);
> + lock_release(&lock->dep_map, (unsigned long)_RET_IP_);
> return pthread_rwlock_unlock(&lock->rwlock);
> }
>
> diff --git a/tools/lib/lockdep/preload.c b/tools/lib/lockdep/preload.c
> index 76245d16196d..8f1adbe887b2 100644
> --- a/tools/lib/lockdep/preload.c
> +++ b/tools/lib/lockdep/preload.c
> @@ -270,7 +270,7 @@ int pthread_mutex_lock(pthread_mutex_t *mutex)
> */
> r = ll_pthread_mutex_lock(mutex);
> if (r)
> - lock_release(&__get_lock(mutex)->dep_map, 0, (unsigned long)_RET_IP_);
> + lock_release(&__get_lock(mutex)->dep_map, (unsigned long)_RET_IP_);
>
> return r;
> }
> @@ -284,7 +284,7 @@ int pthread_mutex_trylock(pthread_mutex_t *mutex)
> lock_acquire(&__get_lock(mutex)->dep_map, 0, 1, 0, 1, NULL, (unsigned long)_RET_IP_);
> r = ll_pthread_mutex_trylock(mutex);
> if (r)
> - lock_release(&__get_lock(mutex)->dep_map, 0, (unsigned long)_RET_IP_);
> + lock_release(&__get_lock(mutex)->dep_map, (unsigned long)_RET_IP_);
>
> return r;
> }
> @@ -295,7 +295,7 @@ int pthread_mutex_unlock(pthread_mutex_t *mutex)
>
> try_init_preload();
>
> - lock_release(&__get_lock(mutex)->dep_map, 0, (unsigned long)_RET_IP_);
> + lock_release(&__get_lock(mutex)->dep_map, (unsigned long)_RET_IP_);
> /*
> * Just like taking a lock, only in reverse!
> *
> @@ -355,7 +355,7 @@ int pthread_rwlock_rdlock(pthread_rwlock_t *rwlock)
> lock_acquire(&__get_lock(rwlock)->dep_map, 0, 0, 2, 1, NULL, (unsigned long)_RET_IP_);
> r = ll_pthread_rwlock_rdlock(rwlock);
> if (r)
> - lock_release(&__get_lock(rwlock)->dep_map, 0, (unsigned long)_RET_IP_);
> + lock_release(&__get_lock(rwlock)->dep_map, (unsigned long)_RET_IP_);
>
> return r;
> }
> @@ -369,7 +369,7 @@ int pthread_rwlock_tryrdlock(pthread_rwlock_t *rwlock)
> lock_acquire(&__get_lock(rwlock)->dep_map, 0, 1, 2, 1, NULL, (unsigned long)_RET_IP_);
> r = ll_pthread_rwlock_tryrdlock(rwlock);
> if (r)
> - lock_release(&__get_lock(rwlock)->dep_map, 0, (unsigned long)_RET_IP_);
> + lock_release(&__get_lock(rwlock)->dep_map, (unsigned long)_RET_IP_);
>
> return r;
> }
> @@ -383,7 +383,7 @@ int pthread_rwlock_trywrlock(pthread_rwlock_t *rwlock)
> lock_acquire(&__get_lock(rwlock)->dep_map, 0, 1, 0, 1, NULL, (unsigned long)_RET_IP_);
> r = ll_pthread_rwlock_trywrlock(rwlock);
> if (r)
> - lock_release(&__get_lock(rwlock)->dep_map, 0, (unsigned long)_RET_IP_);
> + lock_release(&__get_lock(rwlock)->dep_map, (unsigned long)_RET_IP_);
>
> return r;
> }
> @@ -397,7 +397,7 @@ int pthread_rwlock_wrlock(pthread_rwlock_t *rwlock)
> lock_acquire(&__get_lock(rwlock)->dep_map, 0, 0, 0, 1, NULL, (unsigned long)_RET_IP_);
> r = ll_pthread_rwlock_wrlock(rwlock);
> if (r)
> - lock_release(&__get_lock(rwlock)->dep_map, 0, (unsigned long)_RET_IP_);
> + lock_release(&__get_lock(rwlock)->dep_map, (unsigned long)_RET_IP_);
>
> return r;
> }
> @@ -408,7 +408,7 @@ int pthread_rwlock_unlock(pthread_rwlock_t *rwlock)
>
> init_preload();
>
> - lock_release(&__get_lock(rwlock)->dep_map, 0, (unsigned long)_RET_IP_);
> + lock_release(&__get_lock(rwlock)->dep_map, (unsigned long)_RET_IP_);
> r = ll_pthread_rwlock_unlock(rwlock);
> if (r)
> lock_acquire(&__get_lock(rwlock)->dep_map, 0, 0, 0, 1, NULL, (unsigned long)_RET_IP_);
> --
> 1.8.3.1
>

--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch