diff options
author | Nick Piggin <npiggin@kernel.dk> | 2011-01-07 01:49:55 -0500 |
---|---|---|
committer | Nick Piggin <npiggin@kernel.dk> | 2011-01-07 01:50:28 -0500 |
commit | fb045adb99d9b7c562dc7fef834857f78249daa1 (patch) | |
tree | 1fd6a4024fffeec568abe100d730589bfdb81c38 /fs/ocfs2/export.c | |
parent | 5f57cbcc02cf18f6b22ef4066bb10afeb8f930ff (diff) |
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/ocfs2/export.c')
-rw-r--r-- | fs/ocfs2/export.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/ocfs2/export.c b/fs/ocfs2/export.c index 19ad145d2af3..6adafa576065 100644 --- a/fs/ocfs2/export.c +++ b/fs/ocfs2/export.c | |||
@@ -138,7 +138,7 @@ check_gen: | |||
138 | 138 | ||
139 | result = d_obtain_alias(inode); | 139 | result = d_obtain_alias(inode); |
140 | if (!IS_ERR(result)) | 140 | if (!IS_ERR(result)) |
141 | result->d_op = &ocfs2_dentry_ops; | 141 | d_set_d_op(result, &ocfs2_dentry_ops); |
142 | else | 142 | else |
143 | mlog_errno(PTR_ERR(result)); | 143 | mlog_errno(PTR_ERR(result)); |
144 | 144 | ||
@@ -176,7 +176,7 @@ static struct dentry *ocfs2_get_parent(struct dentry *child) | |||
176 | 176 | ||
177 | parent = d_obtain_alias(ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0, 0)); | 177 | parent = d_obtain_alias(ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0, 0)); |
178 | if (!IS_ERR(parent)) | 178 | if (!IS_ERR(parent)) |
179 | parent->d_op = &ocfs2_dentry_ops; | 179 | d_set_d_op(parent, &ocfs2_dentry_ops); |
180 | 180 | ||
181 | bail_unlock: | 181 | bail_unlock: |
182 | ocfs2_inode_unlock(dir, 0); | 182 | ocfs2_inode_unlock(dir, 0); |