This is a note to let you know that I've just added the patch titled
sched/vtime: Work around an unitialized variable warning
to the 5.6-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:
sched-vtime-work-around-an-unitialized-variable-warn.patch
and it can be found in the queue-5.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 56d228de775e2de58b0b43a6360127ed5fac5fbc
Author: Borislav Petkov <bp@xxxxxxx>
Date: Fri Mar 27 22:43:34 2020 +0100
sched/vtime: Work around an unitialized variable warning
[ Upstream commit e0d648f9d883ec1efab261af158d73aa30e9dd12 ]
Work around this warning:
kernel/sched/cputime.c: In function â??kcpustat_fieldâ??:
kernel/sched/cputime.c:1007:6: warning: â??valâ?? may be used uninitialized in this function [-Wmaybe-uninitialized]
because GCC can't see that val is used only when err is 0.
Acked-by: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Signed-off-by: Borislav Petkov <bp@xxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20200327214334.GF8015@xxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/kernel/sched/cputime.c b/kernel/sched/cputime.c
index dac9104d126f7..ff9435dee1df2 100644
--- a/kernel/sched/cputime.c
+++ b/kernel/sched/cputime.c
@@ -1003,12 +1003,12 @@ u64 kcpustat_field(struct kernel_cpustat *kcpustat,
enum cpu_usage_stat usage, int cpu)
{
u64 *cpustat = kcpustat->cpustat;
+ u64 val = cpustat[usage];
struct rq *rq;
- u64 val;
int err;
if (!vtime_accounting_enabled_cpu(cpu))
- return cpustat[usage];
+ return val;
rq = cpu_rq(cpu);
