The quilt patch titled
Subject: watchdog/buddy: don't copy the cpumask in watchdog_next_cpu()
has been removed from the -mm tree. Its filename was
watchdog-buddy-dont-copy-the-cpumask-in-watchdog_next_cpu.patch
This patch was dropped because it was merged into the mm-nonmm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
From: Douglas Anderson <dianders@xxxxxxxxxxxx>
Subject: watchdog/buddy: don't copy the cpumask in watchdog_next_cpu()
Date: Fri, 26 May 2023 18:41:37 -0700
There's no reason to make a copy of the "watchdog_cpus" locally in
watchdog_next_cpu(). Making a copy wouldn't make things any more race
free and we're just reading the value so there's no need for a copy.
Link: https://lkml.kernel.org/r/20230526184139.7.If466f9a2b50884cbf6a1d8ad05525a2c17069407@changeid
Signed-off-by: Douglas Anderson <dianders@xxxxxxxxxxxx>
Suggested-by: Petr Mladek <pmladek@xxxxxxxx>
Reviewed-by: Petr Mladek <pmladek@xxxxxxxx>
Cc: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Nicholas Piggin <npiggin@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/watchdog_buddy.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
--- a/kernel/watchdog_buddy.c~watchdog-buddy-dont-copy-the-cpumask-in-watchdog_next_cpu
+++ a/kernel/watchdog_buddy.c
@@ -10,12 +10,11 @@ static cpumask_t __read_mostly watchdog_
static unsigned int watchdog_next_cpu(unsigned int cpu)
{
- cpumask_t cpus = watchdog_cpus;
unsigned int next_cpu;
- next_cpu = cpumask_next(cpu, &cpus);
+ next_cpu = cpumask_next(cpu, &watchdog_cpus);
if (next_cpu >= nr_cpu_ids)
- next_cpu = cpumask_first(&cpus);
+ next_cpu = cpumask_first(&watchdog_cpus);
if (next_cpu == cpu)
return nr_cpu_ids;
_
Patches currently in -mm which might be from dianders@xxxxxxxxxxxx are
