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| author | Al Viro <viro@zeniv.linux.org.uk> | 2011-02-15 07:26:22 +0100 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2011-02-15 08:26:54 +0100 |
| commit | 24643087e748bf192f1182766716e522dc1c972f (patch) | |
| tree | f67283376c36f6745f1f26c9f67b953ff0b4de55 /fs | |
| parent | nothing in do_follow_link() is going to see RCU (diff) | |
| download | linux-24643087e748bf192f1182766716e522dc1c972f.tar.xz linux-24643087e748bf192f1182766716e522dc1c972f.zip | |
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')
| -rw-r--r-- | fs/namei.c | 31 |
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); } |