From: Tim Hansen <devtimhansen@gmail.com>
To: viro@zeniv.linux.org.uk
Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
devtimhansen@gmail.com
Subject: [PATCH] fs: Safe rcu access to hlist.
Date: Sun, 19 Nov 2017 15:02:10 -0500 [thread overview]
Message-ID: <20171119200210.hhrklgm6hxhoyhqh@debian> (raw)
Adds hlist_first_rcu and hlist_next_rcu for safe access
to the hlist in seq_hlist_next_rcu.
Found on linux-next branch, tag next-20171117 with sparse.
Signed-off-by: Tim Hansen <devtimhansen@gmail.com>
---
fs/seq_file.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/fs/seq_file.c b/fs/seq_file.c
index fb17f35a49a6..0b966781fd60 100644
--- a/fs/seq_file.c
+++ b/fs/seq_file.c
@@ -968,9 +968,9 @@ struct hlist_node *seq_hlist_next_rcu(void *v,
++*ppos;
if (v == SEQ_START_TOKEN)
- return rcu_dereference(head->first);
+ return rcu_dereference(hlist_first_rcu(head));
else
- return rcu_dereference(node->next);
+ return rcu_dereference(hlist_next_rcu(node));
}
EXPORT_SYMBOL(seq_hlist_next_rcu);
--
2.15.0.rc0
next reply other threads:[~2017-11-19 20:02 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-19 20:02 Tim Hansen [this message]
2017-11-19 21:28 ` [PATCH] fs: Safe rcu access to hlist Al Viro
2017-11-20 18:55 ` Tim Hansen
2017-11-20 20:01 ` Luc Van Oostenryck
2017-11-20 20:42 ` Matthew Wilcox
2017-11-20 20:58 ` Luc Van Oostenryck
2017-11-20 21:21 ` Paul E. McKenney
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