From: Gerald Schaefer gerald.schaefer@linux.ibm.com
commit d54cb7d54877d529bc1e0e1f47a3dd082f73add3 upstream.
Commit 152e9b8676c6e ("s390/vtime: steal time exponential moving average") inadvertently changed the input value for account_steal_time() from "cputime_to_nsecs(steal)" to just "steal", resulting in broken increased steal time accounting.
Fix this by changing it back to "cputime_to_nsecs(steal)".
Fixes: 152e9b8676c6e ("s390/vtime: steal time exponential moving average") Cc: stable@vger.kernel.org # 5.1 Reported-by: Sabine Forkel sabine.forkel@de.ibm.com Reviewed-by: Heiko Carstens hca@linux.ibm.com Signed-off-by: Gerald Schaefer gerald.schaefer@linux.ibm.com Signed-off-by: Heiko Carstens hca@linux.ibm.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/s390/kernel/vtime.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/s390/kernel/vtime.c +++ b/arch/s390/kernel/vtime.c @@ -217,7 +217,7 @@ void vtime_flush(struct task_struct *tsk avg_steal = S390_lowcore.avg_steal_timer / 2; if ((s64) steal > 0) { S390_lowcore.steal_timer = 0; - account_steal_time(steal); + account_steal_time(cputime_to_nsecs(steal)); avg_steal += steal; } S390_lowcore.avg_steal_timer = avg_steal;