This is a note to let you know that I've just added the patch titled
tracing/osnoise: Fix missed cpus_read_unlock() in start_per_cpu_kthreads()
to the 5.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
tracing-osnoise-fix-missed-cpus_read_unlock-in-start_per_cpu_kthreads.patch
and it can be found in the queue-5.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 4b6b08f2e45edda4c067ac40833e3c1f84383c0b Mon Sep 17 00:00:00 2001
From: "Qiang.Zhang" <qiang.zhang@xxxxxxxxxxxxx>
Date: Tue, 31 Aug 2021 10:29:19 +0800
Subject: tracing/osnoise: Fix missed cpus_read_unlock() in start_per_cpu_kthreads()
From: Qiang.Zhang <qiang.zhang@xxxxxxxxxxxxx>
commit 4b6b08f2e45edda4c067ac40833e3c1f84383c0b upstream.
When start_kthread() return error, the cpus_read_unlock() need
to be called.
Link: https://lkml.kernel.org/r/20210831022919.27630-1-qiang.zhang@xxxxxxxxxxxxx
Cc: <stable@xxxxxxxxxxxxxxx>
Fixes: c8895e271f79 ("trace/osnoise: Support hotplug operations")
Acked-by: Daniel Bristot de Oliveira <bristot@xxxxxxxxxx>
Signed-off-by: Qiang.Zhang <qiang.zhang@xxxxxxxxxxxxx>
Signed-off-by: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
kernel/trace/trace_osnoise.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/kernel/trace/trace_osnoise.c
+++ b/kernel/trace/trace_osnoise.c
@@ -1548,7 +1548,7 @@ static int start_kthread(unsigned int cp
static int start_per_cpu_kthreads(struct trace_array *tr)
{
struct cpumask *current_mask = &save_cpumask;
- int retval;
+ int retval = 0;
int cpu;
get_online_cpus();
@@ -1568,13 +1568,13 @@ static int start_per_cpu_kthreads(struct
retval = start_kthread(cpu);
if (retval) {
stop_per_cpu_kthreads();
- return retval;
+ break;
}
}
put_online_cpus();
- return 0;
+ return retval;
}
#ifdef CONFIG_HOTPLUG_CPU
Patches currently in stable-queue which might be from qiang.zhang@xxxxxxxxxxxxx are
queue-5.14/tracing-osnoise-fix-missed-cpus_read_unlock-in-start_per_cpu_kthreads.patch
