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authorNick Piggin <npiggin@kernel.dk>2011-01-07 01:49:55 -0500
committerNick Piggin <npiggin@kernel.dk>2011-01-07 01:50:28 -0500
commitfb045adb99d9b7c562dc7fef834857f78249daa1 (patch)
tree1fd6a4024fffeec568abe100d730589bfdb81c38 /fs/reiserfs
parent5f57cbcc02cf18f6b22ef4066bb10afeb8f930ff (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/reiserfs')
-rw-r--r--fs/reiserfs/xattr.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/reiserfs/xattr.c b/fs/reiserfs/xattr.c
index 5d04a7828e7a..e0f0d7ea10a1 100644
--- a/fs/reiserfs/xattr.c
+++ b/fs/reiserfs/xattr.c
@@ -990,7 +990,7 @@ int reiserfs_lookup_privroot(struct super_block *s)
990 strlen(PRIVROOT_NAME)); 990 strlen(PRIVROOT_NAME));
991 if (!IS_ERR(dentry)) { 991 if (!IS_ERR(dentry)) {
992 REISERFS_SB(s)->priv_root = dentry; 992 REISERFS_SB(s)->priv_root = dentry;
993 dentry->d_op = &xattr_lookup_poison_ops; 993 d_set_d_op(dentry, &xattr_lookup_poison_ops);
994 if (dentry->d_inode) 994 if (dentry->d_inode)
995 dentry->d_inode->i_flags |= S_PRIVATE; 995 dentry->d_inode->i_flags |= S_PRIVATE;
996 } else 996 } else