The patch titled
Subject: mm-memory-failure-use-raw_spinlock_t-in-struct-memory_failure_cpu-v3
has been added to the -mm mm-hotfixes-unstable branch. Its filename is
mm-memory-failure-use-raw_spinlock_t-in-struct-memory_failure_cpu-v3.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-memory-failure-use-raw_spinlock_t-in-struct-memory_failure_cpu-v3.patch
This patch will later appear in the mm-hotfixes-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Waiman Long <longman@xxxxxxxxxx>
Subject: mm-memory-failure-use-raw_spinlock_t-in-struct-memory_failure_cpu-v3
Date: Wed, 7 Aug 2024 14:11:30 -0400
don't hold percpu ref across pr_err(), per Miaohe
Link: https://lkml.kernel.org/r/20240807181130.1122660-1-longman@xxxxxxxxxx
Fixes: 0f383b6dc96e ("locking/spinlock: Provide RT variant")
Signed-off-by: Waiman Long <longman@xxxxxxxxxx>
Cc: "Huang, Ying" <ying.huang@xxxxxxxxx>
Cc: Juri Lelli <juri.lelli@xxxxxxxxxx>
Cc: Len Brown <len.brown@xxxxxxxxx>
Cc: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Cc: Naoya Horiguchi <nao.horiguchi@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memory-failure.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/mm/memory-failure.c~mm-memory-failure-use-raw_spinlock_t-in-struct-memory_failure_cpu-v3
+++ a/mm/memory-failure.c
@@ -2455,10 +2455,10 @@ void memory_failure_queue(unsigned long
if (!buffer_overflow)
schedule_work_on(smp_processor_id(), &mf_cpu->work);
raw_spin_unlock_irqrestore(&mf_cpu->lock, proc_flags);
+ put_cpu_var(memory_failure_cpu);
if (buffer_overflow)
pr_err("buffer overflow when queuing memory failure at %#lx\n",
pfn);
- put_cpu_var(memory_failure_cpu);
}
EXPORT_SYMBOL_GPL(memory_failure_queue);
_
Patches currently in -mm which might be from longman@xxxxxxxxxx are
padata-fix-possible-divide-by-0-panic-in-padata_mt_helper.patch
mm-memory-failure-use-raw_spinlock_t-in-struct-memory_failure_cpu.patch
mm-memory-failure-use-raw_spinlock_t-in-struct-memory_failure_cpu-v3.patch
watchdog-handle-the-enodev-failure-case-of-lockup_detector_delay_init-separately.patch
