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authorNick Piggin <npiggin@kernel.dk>2011-01-07 17:49:55 +1100
committerNick Piggin <npiggin@kernel.dk>2011-01-07 17:50:28 +1100
commitfb045adb99d9b7c562dc7fef834857f78249daa1 (patch)
tree1fd6a4024fffeec568abe100d730589bfdb81c38 /fs/libfs.c
parent5f57cbcc02cf18f6b22ef4066bb10afeb8f930ff (diff)
downloadlinux-linaro-stable-fb045adb99d9b7c562dc7fef834857f78249daa1.tar.gz
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/libfs.c')
-rw-r--r--fs/libfs.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/libfs.c b/fs/libfs.c
index 28b36663c44e..889311e3d06b 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -59,7 +59,7 @@ struct dentry *simple_lookup(struct inode *dir, struct dentry *dentry, struct na
if (dentry->d_name.len > NAME_MAX)
return ERR_PTR(-ENAMETOOLONG);
- dentry->d_op = &simple_dentry_operations;
+ d_set_d_op(dentry, &simple_dentry_operations);
d_add(dentry, NULL);
return NULL;
}