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proc_fill_cache(): switch to d_alloc_parallel()

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... making it usable with directory locked shared

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2016-04-20 16:31:31 -04:00
parent 6192269444
commit 3781764b5c
1 changed files with 10 additions and 5 deletions
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15
fs/proc/base.c
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@ -1819,12 +1819,17 @@ bool proc_fill_cache(struct file *file, struct dir_context *ctx,
child = d_hash_and_lookup(dir, &qname);
if (!child) {
child = d_alloc(dir, &qname);
if (!child)
goto end_instantiate;
if (instantiate(d_inode(dir), child, task, ptr) < 0) {
dput(child);
DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq);
child = d_alloc_parallel(dir, &qname, &wq);
if (IS_ERR(child))
goto end_instantiate;
if (d_in_lookup(child)) {
int err = instantiate(d_inode(dir), child, task, ptr);
d_lookup_done(child);
if (err < 0) {
dput(child);
goto end_instantiate;
}
}
}
inode = d_inode(child);