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| author | Al Viro <viro@zeniv.linux.org.uk> | 2017-01-09 01:35:39 -0500 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2017-01-09 01:35:39 -0500 |
| commit | 209a7fb2104f2724f651870306c65f86850ee953 (patch) | |
| tree | 16397127b4d7293e20c89ced78c69f3be4f131fa /fs/namei.c | |
| parent | ad1633a151df9869a222bd99ba04643dc2e0052b (diff) | |
| download | linux-209a7fb2104f2724f651870306c65f86850ee953.tar.bz2 | |
lookup_fast(): clean up the logics around the fallback to non-rcu mode
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/namei.c')
| -rw-r--r-- | fs/namei.c | 14 |
1 files changed, 6 insertions, 8 deletions
diff --git a/fs/namei.c b/fs/namei.c index f08eca2b788b..dfe6e32aeec6 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -1558,12 +1558,7 @@ static int lookup_fast(struct nameidata *nd, *seqp = seq; if (unlikely(dentry->d_flags & DCACHE_OP_REVALIDATE)) status = d_revalidate(dentry, nd->flags); - if (unlikely(status <= 0)) { - if (unlazy_walk(nd, dentry, seq)) - return -ECHILD; - if (status == -ECHILD) - status = d_revalidate(dentry, nd->flags); - } else { + if (likely(status > 0)) { /* * Note: do negative dentry check after revalidation in * case that drops it. @@ -1574,9 +1569,12 @@ static int lookup_fast(struct nameidata *nd, path->dentry = dentry; if (likely(__follow_mount_rcu(nd, path, inode, seqp))) return 1; - if (unlazy_walk(nd, dentry, seq)) - return -ECHILD; } + if (unlazy_walk(nd, dentry, seq)) + return -ECHILD; + if (unlikely(status == -ECHILD)) + /* we'd been told to redo it in non-rcu mode */ + status = d_revalidate(dentry, nd->flags); } else { dentry = __d_lookup(parent, &nd->last); if (unlikely(!dentry)) |