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authorNick Piggin <npiggin@kernel.dk>2011-01-07 09:49:55 +0300
committerNick Piggin <npiggin@kernel.dk>2011-01-07 09:50:28 +0300
commitfb045adb99d9b7c562dc7fef834857f78249daa1 (patch)
tree1fd6a4024fffeec568abe100d730589bfdb81c38 /fs/ocfs2/namei.c
parent5f57cbcc02cf18f6b22ef4066bb10afeb8f930ff (diff)
downloadlinux-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/ocfs2/namei.c')
-rw-r--r--fs/ocfs2/namei.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/fs/ocfs2/namei.c b/fs/ocfs2/namei.c
index ff5744e1e36f..d14cad6e2e41 100644
--- a/fs/ocfs2/namei.c
+++ b/fs/ocfs2/namei.c
@@ -147,7 +147,7 @@ static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry,
spin_unlock(&oi->ip_lock);
bail_add:
- dentry->d_op = &ocfs2_dentry_ops;
+ d_set_d_op(dentry, &ocfs2_dentry_ops);
ret = d_splice_alias(inode, dentry);
if (inode) {
@@ -415,7 +415,7 @@ static int ocfs2_mknod(struct inode *dir,
mlog_errno(status);
goto leave;
}
- dentry->d_op = &ocfs2_dentry_ops;
+ d_set_d_op(dentry, &ocfs2_dentry_ops);
status = ocfs2_add_entry(handle, dentry, inode,
OCFS2_I(inode)->ip_blkno, parent_fe_bh,
@@ -743,7 +743,7 @@ static int ocfs2_link(struct dentry *old_dentry,
}
ihold(inode);
- dentry->d_op = &ocfs2_dentry_ops;
+ d_set_d_op(dentry, &ocfs2_dentry_ops);
d_instantiate(dentry, inode);
out_commit:
@@ -1794,7 +1794,7 @@ static int ocfs2_symlink(struct inode *dir,
mlog_errno(status);
goto bail;
}
- dentry->d_op = &ocfs2_dentry_ops;
+ d_set_d_op(dentry, &ocfs2_dentry_ops);
status = ocfs2_add_entry(handle, dentry, inode,
le64_to_cpu(fe->i_blkno), parent_fe_bh,
@@ -2459,7 +2459,7 @@ int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
goto out_commit;
}
- dentry->d_op = &ocfs2_dentry_ops;
+ d_set_d_op(dentry, &ocfs2_dentry_ops);
d_instantiate(dentry, inode);
status = 0;
out_commit: