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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/gfs2/ops_inode.c
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/gfs2/ops_inode.c')
-rw-r--r--fs/gfs2/ops_inode.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/gfs2/ops_inode.c b/fs/gfs2/ops_inode.c
index 12cbea7502c2..f28f89796f4d 100644
--- a/fs/gfs2/ops_inode.c
+++ b/fs/gfs2/ops_inode.c
@@ -106,7 +106,7 @@ static struct dentry *gfs2_lookup(struct inode *dir, struct dentry *dentry,
106{ 106{
107 struct inode *inode = NULL; 107 struct inode *inode = NULL;
108 108
109 dentry->d_op = &gfs2_dops; 109 d_set_d_op(dentry, &gfs2_dops);
110 110
111 inode = gfs2_lookupi(dir, &dentry->d_name, 0); 111 inode = gfs2_lookupi(dir, &dentry->d_name, 0);
112 if (inode && IS_ERR(inode)) 112 if (inode && IS_ERR(inode))