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author | Nick Piggin <npiggin@kernel.dk> | 2011-01-07 06:49:55 (GMT) |
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committer | Nick Piggin <npiggin@kernel.dk> | 2011-01-07 06:50:28 (GMT) |
commit | fb045adb99d9b7c562dc7fef834857f78249daa1 (patch) | |
tree | 1fd6a4024fffeec568abe100d730589bfdb81c38 /fs/gfs2/export.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/gfs2/export.c')
-rw-r--r-- | fs/gfs2/export.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/gfs2/export.c b/fs/gfs2/export.c index 5ab3839..97012ec 100644 --- a/fs/gfs2/export.c +++ b/fs/gfs2/export.c @@ -130,7 +130,7 @@ static struct dentry *gfs2_get_parent(struct dentry *child) dentry = d_obtain_alias(gfs2_lookupi(child->d_inode, &gfs2_qdotdot, 1)); if (!IS_ERR(dentry)) - dentry->d_op = &gfs2_dops; + d_set_d_op(dentry, &gfs2_dops); return dentry; } @@ -158,7 +158,7 @@ static struct dentry *gfs2_get_dentry(struct super_block *sb, out_inode: dentry = d_obtain_alias(inode); if (!IS_ERR(dentry)) - dentry->d_op = &gfs2_dops; + d_set_d_op(dentry, &gfs2_dops); return dentry; } |