2018-04-07 18:54:30

by Paul McQuade

[permalink] [raw]
Subject: [PATCH 1/3] mm: replace S_IRUGO with 0444

Fix checkpatch warnings about S_IRUGO being less readable than
providing the permissions octal as '0444'.

Signed-off-by: Paul McQuade <[email protected]>
---
mm/cleancache.c | 8 ++++----
mm/cma_debug.c | 12 ++++++------
mm/dmapool.c | 2 +-
mm/frontswap.c | 8 ++++----
4 files changed, 15 insertions(+), 15 deletions(-)

diff --git a/mm/cleancache.c b/mm/cleancache.c
index f7b9fdc79d97..90d259e69496 100644
--- a/mm/cleancache.c
+++ b/mm/cleancache.c
@@ -307,11 +307,11 @@ static int __init init_cleancache(void)
struct dentry *root = debugfs_create_dir("cleancache", NULL);
if (root == NULL)
return -ENXIO;
- debugfs_create_u64("succ_gets", S_IRUGO, root, &cleancache_succ_gets);
- debugfs_create_u64("failed_gets", S_IRUGO,
+ debugfs_create_u64("succ_gets", 0444, root, &cleancache_succ_gets);
+ debugfs_create_u64("failed_gets", 0444,
root, &cleancache_failed_gets);
- debugfs_create_u64("puts", S_IRUGO, root, &cleancache_puts);
- debugfs_create_u64("invalidates", S_IRUGO,
+ debugfs_create_u64("puts", 0444, root, &cleancache_puts);
+ debugfs_create_u64("invalidates", 0444,
root, &cleancache_invalidates);
#endif
return 0;
diff --git a/mm/cma_debug.c b/mm/cma_debug.c
index 275df8b5b22e..6494c7a7d257 100644
--- a/mm/cma_debug.c
+++ b/mm/cma_debug.c
@@ -178,17 +178,17 @@ static void cma_debugfs_add_one(struct cma *cma, int idx)
debugfs_create_file("free", S_IWUSR, tmp, cma,
&cma_free_fops);

- debugfs_create_file("base_pfn", S_IRUGO, tmp,
+ debugfs_create_file("base_pfn", 0444, tmp,
&cma->base_pfn, &cma_debugfs_fops);
- debugfs_create_file("count", S_IRUGO, tmp,
+ debugfs_create_file("count", 0444, tmp,
&cma->count, &cma_debugfs_fops);
- debugfs_create_file("order_per_bit", S_IRUGO, tmp,
+ debugfs_create_file("order_per_bit", 0444, tmp,
&cma->order_per_bit, &cma_debugfs_fops);
- debugfs_create_file("used", S_IRUGO, tmp, cma, &cma_used_fops);
- debugfs_create_file("maxchunk", S_IRUGO, tmp, cma, &cma_maxchunk_fops);
+ debugfs_create_file("used", 0444, tmp, cma, &cma_used_fops);
+ debugfs_create_file("maxchunk", 0444, tmp, cma, &cma_maxchunk_fops);

u32s = DIV_ROUND_UP(cma_bitmap_maxno(cma), BITS_PER_BYTE * sizeof(u32));
- debugfs_create_u32_array("bitmap", S_IRUGO, tmp, (u32*)cma->bitmap, u32s);
+ debugfs_create_u32_array("bitmap", 0444, tmp, (u32 *)cma->bitmap, u32s);
}

static int __init cma_debugfs_init(void)
diff --git a/mm/dmapool.c b/mm/dmapool.c
index 4d90a64b2fdc..6d4b97e7e9e9 100644
--- a/mm/dmapool.c
+++ b/mm/dmapool.c
@@ -105,7 +105,7 @@ show_pools(struct device *dev, struct device_attribute *attr, char *buf)
return PAGE_SIZE - size;
}

-static DEVICE_ATTR(pools, S_IRUGO, show_pools, NULL);
+static DEVICE_ATTR(pools, 0444, show_pools, NULL);

/**
* dma_pool_create - Creates a pool of consistent memory blocks, for dma.
diff --git a/mm/frontswap.c b/mm/frontswap.c
index fec8b5044040..3b41425d34cd 100644
--- a/mm/frontswap.c
+++ b/mm/frontswap.c
@@ -486,11 +486,11 @@ static int __init init_frontswap(void)
struct dentry *root = debugfs_create_dir("frontswap", NULL);
if (root == NULL)
return -ENXIO;
- debugfs_create_u64("loads", S_IRUGO, root, &frontswap_loads);
- debugfs_create_u64("succ_stores", S_IRUGO, root, &frontswap_succ_stores);
- debugfs_create_u64("failed_stores", S_IRUGO, root,
+ debugfs_create_u64("loads", 0444, root, &frontswap_loads);
+ debugfs_create_u64("succ_stores", 0444, root, &frontswap_succ_stores);
+ debugfs_create_u64("failed_stores", 0444, root,
&frontswap_failed_stores);
- debugfs_create_u64("invalidates", S_IRUGO,
+ debugfs_create_u64("invalidates", 0444,
root, &frontswap_invalidates);
#endif
return 0;
--
2.16.2



2018-04-07 18:51:18

by Paul McQuade

[permalink] [raw]
Subject: [PATCH 2/3] mm: Replace S_IWUSR with 0200

Fix checkpatch warnings about S_IWUSR being less readable than
providing the permissions octal as '0200'.

Signed-off-by: Paul McQuade <[email protected]>
---
mm/cma_debug.c | 4 ++--
mm/compaction.c | 2 +-
2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/mm/cma_debug.c b/mm/cma_debug.c
index 6494c7a7d257..f0af3f93d1e4 100644
--- a/mm/cma_debug.c
+++ b/mm/cma_debug.c
@@ -172,10 +172,10 @@ static void cma_debugfs_add_one(struct cma *cma, int idx)

tmp = debugfs_create_dir(name, cma_debugfs_root);

- debugfs_create_file("alloc", S_IWUSR, tmp, cma,
+ debugfs_create_file("alloc", 0200, tmp, cma,
&cma_alloc_fops);

- debugfs_create_file("free", S_IWUSR, tmp, cma,
+ debugfs_create_file("free", 0200, tmp, cma,
&cma_free_fops);

debugfs_create_file("base_pfn", 0444, tmp,
diff --git a/mm/compaction.c b/mm/compaction.c
index 88d01a50a015..50d0000a6afd 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -1900,7 +1900,7 @@ static ssize_t sysfs_compact_node(struct device *dev,

return count;
}
-static DEVICE_ATTR(compact, S_IWUSR, NULL, sysfs_compact_node);
+static DEVICE_ATTR(compact, 0200, NULL, sysfs_compact_node);

int compaction_register_node(struct node *node)
{
--
2.16.2


2018-04-07 18:51:50

by Paul McQuade

[permalink] [raw]
Subject: [PATCH 3/3] mm: replace S_IRUSR | S_IWUSR with 0600

Fix checkpatch warnings about S_IRUSR | S_IWUSR being less readable than
providing the permissions octal as '0600'.

Signed-off-by: Paul McQuade <[email protected]>
---
mm/failslab.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/failslab.c b/mm/failslab.c
index 1f2f248e3601..b135ebb88b6f 100644
--- a/mm/failslab.c
+++ b/mm/failslab.c
@@ -42,7 +42,7 @@ __setup("failslab=", setup_failslab);
static int __init failslab_debugfs_init(void)
{
struct dentry *dir;
- umode_t mode = S_IFREG | S_IRUSR | S_IWUSR;
+ umode_t mode = S_IFREG | 0600;

dir = fault_create_debugfs_attr("failslab", NULL, &failslab.attr);
if (IS_ERR(dir))
--
2.16.2


2018-04-07 20:15:03

by Joe Perches

[permalink] [raw]
Subject: Re: [PATCH 1/3] mm: replace S_IRUGO with 0444

On Sat, 2018-04-07 at 19:47 +0100, Paul McQuade wrote:
> Fix checkpatch warnings about S_IRUGO being less readable than
> providing the permissions octal as '0444'.

Hey Paul.

I sent a cleanup a couple weeks ago to Andrew Morton for the
same thing.

https://lkml.org/lkml/2018/3/26/638

Andrew said he'd wait until after -rc1 is out.

btw: checkpatch can do this substitution automatically

cheers, Joe