Commit-ID: c2ace36b884de9330c4149064ae8d212d2e0d9ee Gitweb: http://git.kernel.org/tip/c2ace36b884de9330c4149064ae8d212d2e0d9ee Author: Pan Xinhui <[email protected]> AuthorDate: Wed, 13 Jul 2016 18:23:34 +0800 Committer: Ingo Molnar <[email protected]> CommitDate: Wed, 10 Aug 2016 14:13:29 +0200
locking/pvqspinlock: Fix a bug in qstat_read() It's obviously wrong to set stat to NULL. So lets remove it. Otherwise it is always zero when we check the latency of kick/wake. Signed-off-by: Pan Xinhui <[email protected]> Signed-off-by: Peter Zijlstra (Intel) <[email protected]> Reviewed-by: Waiman Long <[email protected]> Cc: Andrew Morton <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Paul E. McKenney <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]> --- kernel/locking/qspinlock_stat.h | 1 - 1 file changed, 1 deletion(-) diff --git a/kernel/locking/qspinlock_stat.h b/kernel/locking/qspinlock_stat.h index 22e0253..b9d0315 100644 --- a/kernel/locking/qspinlock_stat.h +++ b/kernel/locking/qspinlock_stat.h @@ -153,7 +153,6 @@ static ssize_t qstat_read(struct file *file, char __user *user_buf, */ if ((counter == qstat_pv_latency_kick) || (counter == qstat_pv_latency_wake)) { - stat = 0; if (kicks) stat = DIV_ROUND_CLOSEST_ULL(stat, kicks); }
