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authorAl Viro <viro@zeniv.linux.org.uk>2011-02-15 01:26:22 -0500
committerAl Viro <viro@zeniv.linux.org.uk>2011-02-15 02:26:54 -0500
commit24643087e748bf192f1182766716e522dc1c972f (patch)
treef67283376c36f6745f1f26c9f67b953ff0b4de55 /fs/namei.c
parent844a391799c25d9ba85cbce33e4697db06083ec6 (diff)
in do_lookup() split RCU and non-RCU cases of need_revalidate
and use unlikely() instead of gotos, for fsck sake... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/namei.c')
-rw-r--r--fs/namei.c31
1 files changed, 16 insertions, 15 deletions
diff --git a/fs/namei.c b/fs/namei.c
index 9ce6d272f4f2..7609bacc7046 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1259,9 +1259,15 @@ static int do_lookup(struct nameidata *nd, struct qstr *name,
return -ECHILD;
nd->seq = seq;
- if (dentry->d_flags & DCACHE_OP_REVALIDATE)
- goto need_revalidate;
-done2:
+ if (unlikely(dentry->d_flags & DCACHE_OP_REVALIDATE)) {
+ dentry = do_revalidate(dentry, nd);
+ if (!dentry)
+ goto need_lookup;
+ if (IS_ERR(dentry))
+ goto fail;
+ if (!(nd->flags & LOOKUP_RCU))
+ goto done;
+ }
path->mnt = mnt;
path->dentry = dentry;
if (likely(__follow_mount_rcu(nd, path, inode, false)))
@@ -1274,8 +1280,13 @@ done2:
if (!dentry)
goto need_lookup;
found:
- if (dentry->d_flags & DCACHE_OP_REVALIDATE)
- goto need_revalidate;
+ if (unlikely(dentry->d_flags & DCACHE_OP_REVALIDATE)) {
+ dentry = do_revalidate(dentry, nd);
+ if (!dentry)
+ goto need_lookup;
+ if (IS_ERR(dentry))
+ goto fail;
+ }
done:
path->mnt = mnt;
path->dentry = dentry;
@@ -1317,16 +1328,6 @@ need_lookup:
mutex_unlock(&dir->i_mutex);
goto found;
-need_revalidate:
- dentry = do_revalidate(dentry, nd);
- if (!dentry)
- goto need_lookup;
- if (IS_ERR(dentry))
- goto fail;
- if (nd->flags & LOOKUP_RCU)
- goto done2;
- goto done;
-
fail:
return PTR_ERR(dentry);
}