Commit-ID: 8388d21468e7e7656867b67ab2ec98a78c9ad799 Gitweb: http://git.kernel.org/tip/8388d21468e7e7656867b67ab2ec98a78c9ad799 Author: Frederic Weisbecker <[email protected]> AuthorDate: Thu, 5 Jan 2017 18:11:42 +0100 Committer: Ingo Molnar <[email protected]> CommitDate: Sat, 14 Jan 2017 09:54:11 +0100
sched/cputime, ia64: Fix incorrect start cputime assignment on task switch On task switch we must initialize the current cputime of the next task using the value of the previous task which got freshly updated. But we are confusing that with doing the opposite, which should result in incorrect cputime accounting. Signed-off-by: Frederic Weisbecker <[email protected]> Acked-by: Thomas Gleixner <[email protected]> Cc: Benjamin Herrenschmidt <[email protected]> Cc: Christian Borntraeger <[email protected]> Cc: Fenghua Yu <[email protected]> Cc: Heiko Carstens <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Martin Schwidefsky <[email protected]> Cc: Michael Ellerman <[email protected]> Cc: Paul Mackerras <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Rik van Riel <[email protected]> Cc: Stanislaw Gruszka <[email protected]> Cc: Tony Luck <[email protected]> Cc: Wanpeng Li <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]> --- arch/ia64/kernel/time.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/ia64/kernel/time.c b/arch/ia64/kernel/time.c index 71775b95..637e741 100644 --- a/arch/ia64/kernel/time.c +++ b/arch/ia64/kernel/time.c @@ -83,7 +83,7 @@ void arch_vtime_task_switch(struct task_struct *prev) struct thread_info *pi = task_thread_info(prev); struct thread_info *ni = task_thread_info(current); - pi->ac_stamp = ni->ac_stamp; + ni->ac_stamp = pi->ac_stamp; ni->ac_stime = ni->ac_utime = 0; }
