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| author | Nick Piggin <npiggin@kernel.dk> | 2011-01-07 17:49:55 +1100 |
|---|---|---|
| committer | Nick Piggin <npiggin@kernel.dk> | 2011-01-07 17:50:28 +1100 |
| commit | fb045adb99d9b7c562dc7fef834857f78249daa1 (patch) | |
| tree | 1fd6a4024fffeec568abe100d730589bfdb81c38 /fs/adfs | |
| parent | 5f57cbcc02cf18f6b22ef4066bb10afeb8f930ff (diff) | |
| download | lwn-fb045adb99d9b7c562dc7fef834857f78249daa1.tar.gz lwn-fb045adb99d9b7c562dc7fef834857f78249daa1.zip | |
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/adfs')
| -rw-r--r-- | fs/adfs/dir.c | 2 | ||||
| -rw-r--r-- | fs/adfs/super.c | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/fs/adfs/dir.c b/fs/adfs/dir.c index a11e5e102716..bf7693c384f9 100644 --- a/fs/adfs/dir.c +++ b/fs/adfs/dir.c @@ -276,7 +276,7 @@ adfs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd) struct object_info obj; int error; - dentry->d_op = &adfs_dentry_operations; + d_set_d_op(dentry, &adfs_dentry_operations); lock_kernel(); error = adfs_dir_lookup_byname(dir, &dentry->d_name, &obj); if (error == 0) { diff --git a/fs/adfs/super.c b/fs/adfs/super.c index 47dffc513a26..a4041b52fbca 100644 --- a/fs/adfs/super.c +++ b/fs/adfs/super.c @@ -484,7 +484,7 @@ static int adfs_fill_super(struct super_block *sb, void *data, int silent) adfs_error(sb, "get root inode failed\n"); goto error; } else - sb->s_root->d_op = &adfs_dentry_operations; + d_set_d_op(sb->s_root, &adfs_dentry_operations); unlock_kernel(); return 0; |