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author | Nick Piggin <npiggin@kernel.dk> | 2011-01-07 17:49:55 +1100 |
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committer | Nick Piggin <npiggin@kernel.dk> | 2011-01-07 17:50:28 +1100 |
commit | fb045adb99d9b7c562dc7fef834857f78249daa1 (patch) | |
tree | 1fd6a4024fffeec568abe100d730589bfdb81c38 /fs/fat/inode.c | |
parent | 5f57cbcc02cf18f6b22ef4066bb10afeb8f930ff (diff) | |
download | linux-3.10-fb045adb99d9b7c562dc7fef834857f78249daa1.tar.gz linux-3.10-fb045adb99d9b7c562dc7fef834857f78249daa1.tar.bz2 linux-3.10-fb045adb99d9b7c562dc7fef834857f78249daa1.zip |
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/fat/inode.c')
-rw-r--r-- | fs/fat/inode.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/fat/inode.c b/fs/fat/inode.c index 8cccfebee18..206351af7c5 100644 --- a/fs/fat/inode.c +++ b/fs/fat/inode.c @@ -750,7 +750,7 @@ static struct dentry *fat_fh_to_dentry(struct super_block *sb, */ result = d_obtain_alias(inode); if (!IS_ERR(result)) - result->d_op = sb->s_root->d_op; + d_set_d_op(result, sb->s_root->d_op); return result; } @@ -800,7 +800,7 @@ static struct dentry *fat_get_parent(struct dentry *child) parent = d_obtain_alias(inode); if (!IS_ERR(parent)) - parent->d_op = sb->s_root->d_op; + d_set_d_op(parent, sb->s_root->d_op); out: unlock_super(sb); |