From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sun, 12 Nov 2023 05:38:02 +0000 (-0500)
Subject: d_alloc_parallel(): in-lookup hash insertion doesn't need an RCU variant
X-Git-Tag: v6.8-rc1~115^2~4
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=f9f677c5f723394170fa838b856602476150948d;p=thirdparty%2Flinux.git

d_alloc_parallel(): in-lookup hash insertion doesn't need an RCU variant

We only search in the damn thing under hlist_bl_lock(); RCU variant
of insertion was, IIRC, pretty much cargo-culted - mea culpa...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---

diff --git a/fs/dcache.c b/fs/dcache.c
index 8473c8f0ce229..82d0861857035 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -2692,7 +2692,7 @@ retry:
 	/* we can't take ->d_lock here; it's OK, though. */
 	new->d_flags |= DCACHE_PAR_LOOKUP;
 	new->d_wait = wq;
-	hlist_bl_add_head_rcu(&new->d_u.d_in_lookup_hash, b);
+	hlist_bl_add_head(&new->d_u.d_in_lookup_hash, b);
 	hlist_bl_unlock(b);
 	return new;
 mismatch: