linux-kernel - [PATCH 1/5] hrtimer_nanosleep: use -EINTR, not -ERESTARTNOHAND

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Date:	Fri, 1 Feb 2008 16:37:55 +0300
From:	Oleg Nesterov <oleg@...sign.ru>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>
Cc:	Alexey Dobriyan <adobriyan@...ru>, Ingo Molnar <mingo@...e.hu>,
	Pavel Emelyanov <xemul@...ru>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 1/5] hrtimer_nanosleep: use -EINTR, not -ERESTARTNOHAND

hrtimer_nanosleep:

	/* Absolute timers do not update the rmtp value and restart: */
	return -ERESTARTNOHAND;

This is not right, -ERESTARTNOHAND means we will do restart if there is no
in fact pending signal, and worse, this restart will use the same unchanged
"__user *rmtp" parameter.

Use -EINTR instead.

Signed-off-by: Oleg Nesterov <oleg@...sign.ru>

--- MM/kernel/hrtimer.c~HRT_RMTP~	2008-01-27 17:07:39.000000000 +0300
+++ MM/kernel/hrtimer.c~HRT_RMTP	2008-02-01 13:43:52.000000000 +0300
@@ -1359,7 +1359,7 @@ long hrtimer_nanosleep(struct timespec *
 
 	/* Absolute timers do not update the rmtp value and restart: */
 	if (mode == HRTIMER_MODE_ABS)
-		return -ERESTARTNOHAND;
+		return -EINTR;
 
 	if (rmtp) {
 		rem = ktime_sub(t.timer.expires, t.timer.base->get_time());

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