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[tip:locking/core] locking/pvqspinlock: Avoid double resetting of stats

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  [tip:locking/core] locking/pvqspinlock: Avoid double resetting of  stats tip-bot for Davidlohr Bueso <tipbot@zytor.com> - 2016-05-05 11:50 +0200

#1394994 — [tip:locking/core] locking/pvqspinlock: Avoid double resetting of stats

Commit-ID:  dc209a3fd73ec96d4491bcc128c3b50b0a8e8017
Gitweb:     http://git.kernel.org/tip/dc209a3fd73ec96d4491bcc128c3b50b0a8e8017
Author:     Davidlohr Bueso <dave@stgolabs.net>
AuthorDate: Sun, 17 Apr 2016 23:31:42 -0700
Committer:  Ingo Molnar <mingo@kernel.org>
CommitDate: Thu, 5 May 2016 09:58:49 +0200

locking/pvqspinlock: Avoid double resetting of stats

... remove the redundant second iteration, this is most
likely a copy/past buglet.

Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: dave@stgolabs.net
Cc: waiman.long@hpe.com
Link: http://lkml.kernel.org/r/1460961103-24953-2-git-send-email-dave@stgolabs.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 kernel/locking/qspinlock_stat.h | 2 --
 1 file changed, 2 deletions(-)

diff --git a/kernel/locking/qspinlock_stat.h b/kernel/locking/qspinlock_stat.h
index d734b75..7272233 100644
--- a/kernel/locking/qspinlock_stat.h
+++ b/kernel/locking/qspinlock_stat.h
@@ -191,8 +191,6 @@ static ssize_t qstat_write(struct file *file, const char __user *user_buf,
 
 		for (i = 0 ; i < qstat_num; i++)
 			WRITE_ONCE(ptr[i], 0);
-		for (i = 0 ; i < qstat_num; i++)
-			WRITE_ONCE(ptr[i], 0);
 	}
 	return count;
 }

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