The patch titled
Subject: panic-use-atomic_try_cmpxchg-in-panic-and-nmi_panic-v2
has been added to the -mm mm-nonmm-unstable branch. Its filename is
panic-use-atomic_try_cmpxchg-in-panic-and-nmi_panic-v2.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/panic-use-atomic_try_cmpxchg-in-panic-and-nmi_panic-v2.patch
This patch will later appear in the mm-nonmm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Uros Bizjak <ubizjak@xxxxxxxxx>
Subject: panic-use-atomic_try_cmpxchg-in-panic-and-nmi_panic-v2
Date: Wed, 6 Sep 2023 21:11:28 +0200
clean up if/else block
Link: https://lkml.kernel.org/r/20230906191200.68707-1-ubizjak@xxxxxxxxx
Signed-off-by: Uros Bizjak <ubizjak@xxxxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/panic.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/kernel/panic.c~panic-use-atomic_try_cmpxchg-in-panic-and-nmi_panic-v2
+++ a/kernel/panic.c
@@ -321,9 +321,9 @@ void panic(const char *fmt, ...)
this_cpu = raw_smp_processor_id();
/* atomic_try_cmpxchg updates old_cpu on failure */
- if (atomic_try_cmpxchg(&panic_cpu, &old_cpu, this_cpu))
- ;
- else if (old_cpu != this_cpu)
+ if (atomic_try_cmpxchg(&panic_cpu, &old_cpu, this_cpu)) {
+ /* go ahead */
+ } else if (old_cpu != this_cpu)
panic_smp_self_stop();
console_verbose();
_
Patches currently in -mm which might be from ubizjak@xxxxxxxxx are
mm-vmstat-use-this_cpu_try_cmpxchg-in-mod_zonenode_state.patch
panic-use-atomic_try_cmpxchg-in-panic-and-nmi_panic.patch
panic-use-atomic_try_cmpxchg-in-panic-and-nmi_panic-v2.patch
