From: Karsten Wiese <fzu@wemgehoertderstaat.de>
Date: Wed, 6 Feb 2008 09:37:59 +0000 (-0800)
Subject: make sys_poll() wait at least timeout ms
X-Git-Tag: v2.6.25-rc1~669
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=844fcc53962d781aab7c164acbfa46505427375e;p=linux-2.6

make sys_poll() wait at least timeout ms

schedule_timeout(jiffies) waits for at least jiffies - 1.  Add 1 jiffie to
the timeout_jiffies calculated in sys_poll() to wait at least
timeout_msecs, like poll() manpage says.

Signed-off-by: Karsten Wiese <fzu@wemgehoertderstaat.de>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/fs/select.c b/fs/select.c
index 47f47925ae..5633fe9807 100644
--- a/fs/select.c
+++ b/fs/select.c
@@ -739,7 +739,7 @@ asmlinkage long sys_poll(struct pollfd __user *ufds, unsigned int nfds,
 			timeout_jiffies = -1;
 		else
 #endif
-			timeout_jiffies = msecs_to_jiffies(timeout_msecs);
+			timeout_jiffies = msecs_to_jiffies(timeout_msecs) + 1;
 	} else {
 		/* Infinite (< 0) or no (0) timeout */
 		timeout_jiffies = timeout_msecs;