From 3781764b5cb109152af180a4f17cd3a24d5bc51f Mon Sep 17 00:00:00 2001 From: Al Viro Date: Wed, 20 Apr 2016 16:31:31 -0400 Subject: [PATCH] proc_fill_cache(): switch to d_alloc_parallel() ... making it usable with directory locked shared Signed-off-by: Al Viro --- fs/proc/base.c | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) diff --git a/fs/proc/base.c b/fs/proc/base.c index b1755b23893e..15b60f1a346d 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -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); -- 2.39.2