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| author | Hugh Dickins | 2012-05-30 00:06:38 +0200 |
|---|---|---|
| committer | Linus Torvalds | 2012-05-30 01:22:22 +0200 |
| commit | 2f6e38f3cd17a7858112f538c1700c747170db1f (patch) | |
| tree | 894181551acd46caea34ff2b3fba13ffd049fcbd /mm/shmem.c | |
| parent | shmem: replace page if mapping excludes its zone (diff) | |
| download | kernel-qcow2-linux-2f6e38f3cd17a7858112f538c1700c747170db1f.tar.gz kernel-qcow2-linux-2f6e38f3cd17a7858112f538c1700c747170db1f.tar.xz kernel-qcow2-linux-2f6e38f3cd17a7858112f538c1700c747170db1f.zip | |
tmpfs: enable NOSEC optimization
Let tmpfs into the NOSEC optimization (avoiding file_remove_suid()
overhead on most common writes): set MS_NOSEC on its superblocks.
Signed-off-by: Hugh Dickins <hughd@google.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/shmem.c')
| -rw-r--r-- | mm/shmem.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/mm/shmem.c b/mm/shmem.c index db72d8e44ec6..fe5ae6962ab3 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -2373,6 +2373,7 @@ int shmem_fill_super(struct super_block *sb, void *data, int silent) } } sb->s_export_op = &shmem_export_ops; + sb->s_flags |= MS_NOSEC; #else sb->s_flags |= MS_NOUSER; #endif |