[PATCH AUTOSEL 5.6 27/38] sched/vtime: Work around an unitialized variable warning

Sasha Levin
2020-04-24T12:31:46Z

From: Borislav Petkov <bp@suse.de>

[ Upstream commit e0d648f9d883ec1efab261af158d73aa30e9dd12 ]

Work around this warning:

kernel/sched/cputime.c: In function ‘kcpustat_field’:
kernel/sched/cputime.c:1007:6: warning: ‘val’ 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@infradead.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20200327214334.GF8015@zn.tnic
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
kernel/sched/cputime.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

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);

--
2.20.1