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Subject[PATCH v0 21/42] tracing: Check notifier registration return value
Date
From: Borislav Petkov <bp@suse.de>

Avoid homegrown notifier registration checks.

No functional changes.

Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Steven Rostedt <rostedt@goodmis.org>
---
kernel/trace/trace.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index f9139dc1262c..87fd6f1fa407 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -10064,8 +10064,8 @@ __init static int tracer_alloc_buffers(void)
/* All seems OK, enable tracing */
tracing_disabled = 0;

- atomic_notifier_chain_register(&panic_notifier_list,
- &trace_panic_notifier);
+ if (atomic_notifier_chain_register(&panic_notifier_list, &trace_panic_notifier))
+ pr_warn("Trace panic notifier already registered\n");

register_die_notifier(&trace_die_notifier);

--
2.29.2
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