[Patch depends on another patch in this series that introduces raw_cpu_ops]
Convert uses of __get_cpu_var for creating a address from a percpu
offset to this_cpu_ptr.
The two cases where get_cpu_var is used to actually access a percpu
variable are changed to use this_cpu_read/raw_cpu_read.
CC: Thomas Gleixner <[email protected]>
Signed-off-by: Christoph Lameter <[email protected]>
Index: linux/kernel/hrtimer.c
===================================================================
--- linux.orig/kernel/hrtimer.c 2014-02-03 13:22:35.586033208 -0600
+++ linux/kernel/hrtimer.c 2014-02-03 13:22:35.576033413 -0600
@@ -598,7 +598,7 @@
static int hrtimer_reprogram(struct hrtimer *timer,
struct hrtimer_clock_base *base)
{
- struct hrtimer_cpu_base *cpu_base = &__get_cpu_var(hrtimer_bases);
+ struct hrtimer_cpu_base *cpu_base = this_cpu_ptr(&hrtimer_bases);
ktime_t expires = ktime_sub(hrtimer_get_expires(timer), base->offset);
int res;
@@ -681,7 +681,7 @@
*/
static void retrigger_next_event(void *arg)
{
- struct hrtimer_cpu_base *base = &__get_cpu_var(hrtimer_bases);
+ struct hrtimer_cpu_base *base = this_cpu_ptr(&hrtimer_bases);
if (!hrtimer_hres_active())
return;
@@ -955,7 +955,7 @@
*/
debug_deactivate(timer);
timer_stats_hrtimer_clear_start_info(timer);
- reprogram = base->cpu_base == &__get_cpu_var(hrtimer_bases);
+ reprogram = base->cpu_base == this_cpu_ptr(&hrtimer_bases);
/*
* We must preserve the CALLBACK state flag here,
* otherwise we could move the timer base in
@@ -1010,7 +1010,7 @@
*
* XXX send_remote_softirq() ?
*/
- if (leftmost && new_base->cpu_base == &__get_cpu_var(hrtimer_bases)
+ if (leftmost && new_base->cpu_base == this_cpu_ptr(&hrtimer_bases)
&& hrtimer_enqueue_reprogram(timer, new_base)) {
if (wakeup) {
/*
@@ -1143,7 +1143,7 @@
*/
ktime_t hrtimer_get_next_event(void)
{
- struct hrtimer_cpu_base *cpu_base = &__get_cpu_var(hrtimer_bases);
+ struct hrtimer_cpu_base *cpu_base = this_cpu_ptr(&hrtimer_bases);
struct hrtimer_clock_base *base = cpu_base->clock_base;
ktime_t delta, mindelta = { .tv64 = KTIME_MAX };
unsigned long flags;
@@ -1184,7 +1184,7 @@
memset(timer, 0, sizeof(struct hrtimer));
- cpu_base = &__raw_get_cpu_var(hrtimer_bases);
+ cpu_base = raw_cpu_ptr(&hrtimer_bases);
if (clock_id == CLOCK_REALTIME && mode != HRTIMER_MODE_ABS)
clock_id = CLOCK_MONOTONIC;
@@ -1227,7 +1227,7 @@
struct hrtimer_cpu_base *cpu_base;
int base = hrtimer_clockid_to_base(which_clock);
- cpu_base = &__raw_get_cpu_var(hrtimer_bases);
+ cpu_base = raw_cpu_ptr(&hrtimer_bases);
*tp = ktime_to_timespec(cpu_base->clock_base[base].resolution);
return 0;
@@ -1282,7 +1282,7 @@
*/
void hrtimer_interrupt(struct clock_event_device *dev)
{
- struct hrtimer_cpu_base *cpu_base = &__get_cpu_var(hrtimer_bases);
+ struct hrtimer_cpu_base *cpu_base = this_cpu_ptr(&hrtimer_bases);
ktime_t expires_next, now, entry_time, delta;
int i, retries = 0;
@@ -1416,7 +1416,7 @@
if (!hrtimer_hres_active())
return;
- td = &__get_cpu_var(tick_cpu_device);
+ td = this_cpu_ptr(&tick_cpu_device);
if (td && td->evtdev)
hrtimer_interrupt(td->evtdev);
}
@@ -1480,7 +1480,7 @@
void hrtimer_run_queues(void)
{
struct timerqueue_node *node;
- struct hrtimer_cpu_base *cpu_base = &__get_cpu_var(hrtimer_bases);
+ struct hrtimer_cpu_base *cpu_base = this_cpu_ptr(&hrtimer_bases);
struct hrtimer_clock_base *base;
int index, gettime = 1;
@@ -1718,7 +1718,7 @@
local_irq_disable();
old_base = &per_cpu(hrtimer_bases, scpu);
- new_base = &__get_cpu_var(hrtimer_bases);
+ new_base = this_cpu_ptr(&hrtimer_bases);
/*
* The caller is globally serialized and nobody else
* takes two locks at once, deadlock is not possible.
Index: linux/kernel/irq_work.c
===================================================================
--- linux.orig/kernel/irq_work.c 2014-02-03 13:22:35.586033208 -0600
+++ linux/kernel/irq_work.c 2014-02-03 13:22:35.576033413 -0600
@@ -70,7 +70,7 @@
/* Queue the entry and raise the IPI if needed. */
preempt_disable();
- llist_add(&work->llnode, &__get_cpu_var(irq_work_list));
+ llist_add(&work->llnode, this_cpu_ptr(&irq_work_list));
/*
* If the work is not "lazy" or the tick is stopped, raise the irq
@@ -90,7 +90,7 @@
{
struct llist_head *this_list;
- this_list = &__get_cpu_var(irq_work_list);
+ this_list = this_cpu_ptr(&irq_work_list);
if (llist_empty(this_list))
return false;
@@ -115,7 +115,7 @@
__this_cpu_write(irq_work_raised, 0);
barrier();
- this_list = &__get_cpu_var(irq_work_list);
+ this_list = this_cpu_ptr(&irq_work_list);
if (llist_empty(this_list))
return;
Index: linux/kernel/sched/clock.c
===================================================================
--- linux.orig/kernel/sched/clock.c 2014-02-03 13:22:35.586033208 -0600
+++ linux/kernel/sched/clock.c 2014-02-03 13:22:35.576033413 -0600
@@ -133,7 +133,7 @@
static inline struct sched_clock_data *this_scd(void)
{
- return &__get_cpu_var(sched_clock_data);
+ return this_cpu_ptr(&sched_clock_data);
}
static inline struct sched_clock_data *cpu_sdc(int cpu)
Index: linux/kernel/softirq.c
===================================================================
--- linux.orig/kernel/softirq.c 2014-02-03 13:22:35.586033208 -0600
+++ linux/kernel/softirq.c 2014-02-03 13:22:35.586033208 -0600
@@ -486,7 +486,7 @@
local_irq_disable();
list = __this_cpu_read(tasklet_vec.head);
__this_cpu_write(tasklet_vec.head, NULL);
- __this_cpu_write(tasklet_vec.tail, &__get_cpu_var(tasklet_vec).head);
+ __this_cpu_write(tasklet_vec.tail, this_cpu_ptr(&tasklet_vec.head));
local_irq_enable();
while (list) {
@@ -522,7 +522,7 @@
local_irq_disable();
list = __this_cpu_read(tasklet_hi_vec.head);
__this_cpu_write(tasklet_hi_vec.head, NULL);
- __this_cpu_write(tasklet_hi_vec.tail, &__get_cpu_var(tasklet_hi_vec).head);
+ __this_cpu_write(tasklet_hi_vec.tail, this_cpu_ptr(&tasklet_hi_vec.head));
local_irq_enable();
while (list) {
Index: linux/kernel/time/tick-common.c
===================================================================
--- linux.orig/kernel/time/tick-common.c 2014-02-03 13:22:35.586033208 -0600
+++ linux/kernel/time/tick-common.c 2014-02-03 13:22:35.586033208 -0600
@@ -224,7 +224,7 @@
void tick_install_replacement(struct clock_event_device *newdev)
{
- struct tick_device *td = &__get_cpu_var(tick_cpu_device);
+ struct tick_device *td = this_cpu_ptr(&tick_cpu_device);
int cpu = smp_processor_id();
clockevents_exchange_device(td->evtdev, newdev);
@@ -374,14 +374,14 @@
void tick_suspend(void)
{
- struct tick_device *td = &__get_cpu_var(tick_cpu_device);
+ struct tick_device *td = this_cpu_ptr(&tick_cpu_device);
clockevents_shutdown(td->evtdev);
}
void tick_resume(void)
{
- struct tick_device *td = &__get_cpu_var(tick_cpu_device);
+ struct tick_device *td = this_cpu_ptr(&tick_cpu_device);
int broadcast = tick_resume_broadcast();
clockevents_set_mode(td->evtdev, CLOCK_EVT_MODE_RESUME);
Index: linux/kernel/time/tick-oneshot.c
===================================================================
--- linux.orig/kernel/time/tick-oneshot.c 2014-02-03 13:22:35.586033208 -0600
+++ linux/kernel/time/tick-oneshot.c 2014-02-03 13:22:35.586033208 -0600
@@ -59,7 +59,7 @@
*/
int tick_switch_to_oneshot(void (*handler)(struct clock_event_device *))
{
- struct tick_device *td = &__get_cpu_var(tick_cpu_device);
+ struct tick_device *td = this_cpu_ptr(&tick_cpu_device);
struct clock_event_device *dev = td->evtdev;
if (!dev || !(dev->features & CLOCK_EVT_FEAT_ONESHOT) ||
Index: linux/kernel/time/tick-sched.c
===================================================================
--- linux.orig/kernel/time/tick-sched.c 2014-02-03 13:22:35.586033208 -0600
+++ linux/kernel/time/tick-sched.c 2014-02-03 13:22:35.586033208 -0600
@@ -201,7 +201,7 @@
*/
void __tick_nohz_full_check(void)
{
- struct tick_sched *ts = &__get_cpu_var(tick_cpu_sched);
+ struct tick_sched *ts = this_cpu_ptr(&tick_cpu_sched);
if (tick_nohz_full_cpu(smp_processor_id())) {
if (ts->tick_stopped && !is_idle_task(current)) {
@@ -227,7 +227,7 @@
void tick_nohz_full_kick(void)
{
if (tick_nohz_full_cpu(smp_processor_id()))
- irq_work_queue(&__get_cpu_var(nohz_full_kick_work));
+ irq_work_queue(this_cpu_ptr(&nohz_full_kick_work));
}
static void nohz_full_kick_ipi(void *info)
@@ -530,7 +530,7 @@
unsigned long seq, last_jiffies, next_jiffies, delta_jiffies;
ktime_t last_update, expires, ret = { .tv64 = 0 };
unsigned long rcu_delta_jiffies;
- struct clock_event_device *dev = __get_cpu_var(tick_cpu_device).evtdev;
+ struct clock_event_device *dev = __this_cpu_read(tick_cpu_device.evtdev);
u64 time_delta;
time_delta = timekeeping_max_deferment();
@@ -798,7 +798,7 @@
local_irq_disable();
- ts = &__get_cpu_var(tick_cpu_sched);
+ ts = this_cpu_ptr(&tick_cpu_sched);
ts->inidle = 1;
__tick_nohz_idle_enter(ts);
@@ -816,7 +816,7 @@
*/
void tick_nohz_irq_exit(void)
{
- struct tick_sched *ts = &__get_cpu_var(tick_cpu_sched);
+ struct tick_sched *ts = this_cpu_ptr(&tick_cpu_sched);
if (ts->inidle)
__tick_nohz_idle_enter(ts);
@@ -831,7 +831,7 @@
*/
ktime_t tick_nohz_get_sleep_length(void)
{
- struct tick_sched *ts = &__get_cpu_var(tick_cpu_sched);
+ struct tick_sched *ts = this_cpu_ptr(&tick_cpu_sched);
return ts->sleep_length;
}
@@ -944,7 +944,7 @@
*/
static void tick_nohz_handler(struct clock_event_device *dev)
{
- struct tick_sched *ts = &__get_cpu_var(tick_cpu_sched);
+ struct tick_sched *ts = this_cpu_ptr(&tick_cpu_sched);
struct pt_regs *regs = get_irq_regs();
ktime_t now = ktime_get();
@@ -964,7 +964,7 @@
*/
static void tick_nohz_switch_to_nohz(void)
{
- struct tick_sched *ts = &__get_cpu_var(tick_cpu_sched);
+ struct tick_sched *ts = this_cpu_ptr(&tick_cpu_sched);
ktime_t next;
if (!tick_nohz_active)
@@ -1100,7 +1100,7 @@
*/
void tick_setup_sched_timer(void)
{
- struct tick_sched *ts = &__get_cpu_var(tick_cpu_sched);
+ struct tick_sched *ts = this_cpu_ptr(&tick_cpu_sched);
ktime_t now = ktime_get();
/*
@@ -1169,7 +1169,7 @@
*/
void tick_oneshot_notify(void)
{
- struct tick_sched *ts = &__get_cpu_var(tick_cpu_sched);
+ struct tick_sched *ts = this_cpu_ptr(&tick_cpu_sched);
set_bit(0, &ts->check_clocks);
}
@@ -1184,7 +1184,7 @@
*/
int tick_check_oneshot_change(int allow_nohz)
{
- struct tick_sched *ts = &__get_cpu_var(tick_cpu_sched);
+ struct tick_sched *ts = this_cpu_ptr(&tick_cpu_sched);
if (!test_and_clear_bit(0, &ts->check_clocks))
return 0;
Index: linux/kernel/timer.c
===================================================================
--- linux.orig/kernel/timer.c 2014-02-03 13:22:35.586033208 -0600
+++ linux/kernel/timer.c 2014-02-03 13:22:35.586033208 -0600
@@ -621,7 +621,7 @@
static void do_init_timer(struct timer_list *timer, unsigned int flags,
const char *name, struct lock_class_key *key)
{
- struct tvec_base *base = __raw_get_cpu_var(tvec_bases);
+ struct tvec_base *base = raw_cpu_read(tvec_bases);
timer->entry.next = NULL;
timer->base = (void *)((unsigned long)base | flags);
Index: linux/drivers/clocksource/dummy_timer.c
===================================================================
--- linux.orig/drivers/clocksource/dummy_timer.c 2014-02-03 13:22:35.586033208 -0600
+++ linux/drivers/clocksource/dummy_timer.c 2014-02-03 13:22:35.586033208 -0600
@@ -28,7 +28,7 @@
static void dummy_timer_setup(void)
{
int cpu = smp_processor_id();
- struct clock_event_device *evt = __this_cpu_ptr(&dummy_timer_evt);
+ struct clock_event_device *evt = raw_cpu_ptr(&dummy_timer_evt);
evt->name = "dummy_timer";
evt->features = CLOCK_EVT_FEAT_PERIODIC |
On Fri, 14 Feb 2014, Christoph Lameter wrote:
> [Patch depends on another patch in this series that introduces raw_cpu_ops]
>
> Convert uses of __get_cpu_var for creating a address from a percpu
> offset to this_cpu_ptr.
>
> The two cases where get_cpu_var is used to actually access a percpu
> variable are changed to use this_cpu_read/raw_cpu_read.
>
> CC: Thomas Gleixner <[email protected]>
> Signed-off-by: Christoph Lameter <[email protected]>
Reviewed-by: Thomas Gleixner <[email protected]>