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| author | Al Viro | 2012-03-30 20:18:50 +0200 |
|---|---|---|
| committer | Al Viro | 2012-03-31 22:03:16 +0200 |
| commit | 08b0ab7c20f767187ae635d51bdd9d262ebe8357 (patch) | |
| tree | b3b7258f1bee1574df231279dec23fe0c92a2b46 /fs/namei.c | |
| parent | untangling do_lookup() - eliminate a loop. (diff) | |
| download | kernel-qcow2-linux-08b0ab7c20f767187ae635d51bdd9d262ebe8357.tar.gz kernel-qcow2-linux-08b0ab7c20f767187ae635d51bdd9d262ebe8357.tar.xz kernel-qcow2-linux-08b0ab7c20f767187ae635d51bdd9d262ebe8357.zip | |
untangling do_lookup() - get rid of need_reval in !dentry case
Everything arriving into if (!dentry) will have need_reval = 1.
Indeed, the only way to get there with need_reval reset to 0 would
be via
if (unlikely(d_need_lookup(dentry)))
goto unlazy;
if (unlikely(dentry->d_flags & DCACHE_OP_REVALIDATE)) {
status = d_revalidate(dentry, nd);
if (unlikely(status <= 0)) {
if (status != -ECHILD)
need_reval = 0;
goto unlazy;
...
unlazy:
/* no assignments to dentry */
if (dentry && unlikely(d_need_lookup(dentry))) {
dput(dentry);
dentry = NULL;
}
and if d_need_lookup() had already been false the first time around, it
will remain false on the second call as well.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/namei.c')
| -rw-r--r-- | fs/namei.c | 7 |
1 files changed, 1 insertions, 6 deletions
diff --git a/fs/namei.c b/fs/namei.c index 9ce43a358c33..14bb00a9fa9a 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -1181,7 +1181,6 @@ retry: return PTR_ERR(dentry); } /* known good */ - need_reval = 0; status = 1; } else if (unlikely(d_need_lookup(dentry))) { dentry = d_inode_lookup(parent, dentry, nd); @@ -1190,10 +1189,8 @@ retry: return PTR_ERR(dentry); } /* known good */ - need_reval = 0; status = 1; - } - if (unlikely(dentry->d_flags & DCACHE_OP_REVALIDATE) && need_reval) + } else if (unlikely(dentry->d_flags & DCACHE_OP_REVALIDATE)) status = d_revalidate(dentry, nd); if (unlikely(status <= 0)) { if (status < 0) { @@ -1209,7 +1206,6 @@ retry: return PTR_ERR(dentry); } /* known good */ - need_reval = 0; status = 1; } } @@ -1226,7 +1222,6 @@ retry: if (!d_invalidate(dentry)) { dput(dentry); dentry = NULL; - need_reval = 1; goto retry; } } |