diff mbox series

[04/10] watchdog/hardlockup: In watchdog_hardlockup_check() use cpumask_copy()

Message ID 20230526184139.4.Iccee2d1ea19114dafb6553a854ea4d8ab2a3f25b@changeid
State New
Headers
Series watchdog: Cleanup / fixes after buddy series v5 reviews |

Commit Message

Doug Anderson May 27, 2023, 1:41 a.m. UTC 
  In the patch ("watchdog/hardlockup: add a "cpu" param to
watchdog_hardlockup_check()") we started using a cpumask to keep track
of which CPUs to backtrace. When setting up this cpumask, it's better
to use cpumask_copy() than to just copy the structure directly. Fix this.

Suggested-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
---

 kernel/watchdog.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

Comments

Petr Mladek May 30, 2023, 2:40 p.m. UTC | #1 
On Fri 2023-05-26 18:41:34, Douglas Anderson wrote:
> In the patch ("watchdog/hardlockup: add a "cpu" param to
> watchdog_hardlockup_check()") we started using a cpumask to keep track
> of which CPUs to backtrace. When setting up this cpumask, it's better
> to use cpumask_copy() than to just copy the structure directly. Fix this.
> 
> Suggested-by: Petr Mladek <pmladek@suse.com>
> Signed-off-by: Douglas Anderson <dianders@chromium.org>

Reviewed-by: Petr Mladek <pmladek@suse.com>

Best Regards,
Petr
diff mbox series

Patch

diff --git a/kernel/watchdog.c b/kernel/watchdog.c
index 32dac8028753..85f4839b6faf 100644
--- a/kernel/watchdog.c
+++ b/kernel/watchdog.c
@@ -154,7 +154,9 @@  void watchdog_hardlockup_check(unsigned int cpu, struct pt_regs *regs)
 	 */
 	if (is_hardlockup(cpu)) {
 		unsigned int this_cpu = smp_processor_id();
-		struct cpumask backtrace_mask = *cpu_online_mask;
+		struct cpumask backtrace_mask;
+
+		cpumask_copy(&backtrace_mask, cpu_online_mask);
 
 		/* Only print hardlockups once. */
 		if (per_cpu(watchdog_hardlockup_warned, cpu))