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| author | Nick Piggin <npiggin@kernel.dk> | 2011-01-07 09:49:55 +0300 |
|---|---|---|
| committer | Nick Piggin <npiggin@kernel.dk> | 2011-01-07 09:50:28 +0300 |
| commit | fb045adb99d9b7c562dc7fef834857f78249daa1 (patch) | |
| tree | 1fd6a4024fffeec568abe100d730589bfdb81c38 /fs/sysv/super.c | |
| parent | 5f57cbcc02cf18f6b22ef4066bb10afeb8f930ff (diff) | |
| download | linux-fb045adb99d9b7c562dc7fef834857f78249daa1.tar.xz | |
fs: dcache reduce branches in lookup path
Reduce some branches and memory accesses in dcache lookup by adding dentry
flags to indicate common d_ops are set, rather than having to check them.
This saves a pointer memory access (dentry->d_op) in common path lookup
situations, and saves another pointer load and branch in cases where we
have d_op but not the particular operation.
Patched with:
git grep -E '[.>]([[:space:]])*d_op([[:space:]])*=' | xargs sed -e 's/\([^\t ]*\)->d_op = \(.*\);/d_set_d_op(\1, \2);/' -e 's/\([^\t ]*\)\.d_op = \(.*\);/d_set_d_op(\&\1, \2);/' -i
Signed-off-by: Nick Piggin <npiggin@kernel.dk>
Diffstat (limited to 'fs/sysv/super.c')
| -rw-r--r-- | fs/sysv/super.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/sysv/super.c b/fs/sysv/super.c index 3d9c62be0c10..76712aefc4ab 100644 --- a/fs/sysv/super.c +++ b/fs/sysv/super.c @@ -346,7 +346,7 @@ static int complete_read_super(struct super_block *sb, int silent, int size) if (sbi->s_forced_ro) sb->s_flags |= MS_RDONLY; if (sbi->s_truncate) - sb->s_root->d_op = &sysv_dentry_operations; + d_set_d_op(sb->s_root, &sysv_dentry_operations); return 1; } |