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| author | Andrzej Hajda <a.hajda@samsung.com> | 2015-02-13 14:36:41 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-02-13 21:21:36 -0800 |
| commit | fcc139ae227b97bd81352e9102d8e79498d1e930 (patch) | |
| tree | ba99b24ed6f6a39193e12dc35e10406b0332c6f3 /fs/namespace.c | |
| parent | 3dec16ea38afce38ceb49c8938901318797a08c4 (diff) | |
| download | lwn-fcc139ae227b97bd81352e9102d8e79498d1e930.tar.gz lwn-fcc139ae227b97bd81352e9102d8e79498d1e930.zip | |
fs/namespace: convert devname allocation to kstrdup_const
VFS frequently performs duplication of strings located in read-only memory
section. Replacing kstrdup by kstrdup_const allows to avoid such
operations.
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Mike Turquette <mturquette@linaro.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Greg KH <greg@kroah.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/namespace.c')
| -rw-r--r-- | fs/namespace.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/fs/namespace.c b/fs/namespace.c index cd1e9681a0cf..6dae553dd69c 100644 --- a/fs/namespace.c +++ b/fs/namespace.c @@ -201,7 +201,7 @@ static struct mount *alloc_vfsmnt(const char *name) goto out_free_cache; if (name) { - mnt->mnt_devname = kstrdup(name, GFP_KERNEL); + mnt->mnt_devname = kstrdup_const(name, GFP_KERNEL); if (!mnt->mnt_devname) goto out_free_id; } @@ -234,7 +234,7 @@ static struct mount *alloc_vfsmnt(const char *name) #ifdef CONFIG_SMP out_free_devname: - kfree(mnt->mnt_devname); + kfree_const(mnt->mnt_devname); #endif out_free_id: mnt_free_id(mnt); @@ -568,7 +568,7 @@ int sb_prepare_remount_readonly(struct super_block *sb) static void free_vfsmnt(struct mount *mnt) { - kfree(mnt->mnt_devname); + kfree_const(mnt->mnt_devname); #ifdef CONFIG_SMP free_percpu(mnt->mnt_pcp); #endif |