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authorMasami Hiramatsu <mhiramat@kernel.org>2022-03-31 10:11:17 +0900
committerAlexei Starovoitov <ast@kernel.org>2022-03-30 19:28:17 -0700
commita2fb49833cad07a53651c23dce508127085fae2d (patch)
treeda532f8277b15f581506b106a8159db0a10eb609 /kernel/trace/rethook.c
parent2609f635a20d3691e7b5725edc3bdadb7bedf8fb (diff)
rethook: Fix to use WRITE_ONCE() for rethook:: Handler
Since the function pointered by rethook::handler never be removed when the rethook is alive, it doesn't need to use rcu_assign_pointer() to update it. Just use WRITE_ONCE(). Reported-by: Alexei Starovoitov <alexei.starovoitov@gmail.com> Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/164868907688.21983.1606862921419988152.stgit@devnote2
Diffstat (limited to 'kernel/trace/rethook.c')
-rw-r--r--kernel/trace/rethook.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/trace/rethook.c b/kernel/trace/rethook.c
index ab463a4d2b23..b56833700d23 100644
--- a/kernel/trace/rethook.c
+++ b/kernel/trace/rethook.c
@@ -65,7 +65,7 @@ static void rethook_free_rcu(struct rcu_head *head)
*/
void rethook_free(struct rethook *rh)
{
- rcu_assign_pointer(rh->handler, NULL);
+ WRITE_ONCE(rh->handler, NULL);
call_rcu(&rh->rcu, rethook_free_rcu);
}