linux-kernel - [PATCH] Do deferrable flag check also for timers in tv2-tv5

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Message-Id: <1214807889-11648-1-git-send-email-jouni.hogander@nokia.com>
Date:	Mon, 30 Jun 2008 09:38:09 +0300
From:	Jouni Hogander <jouni.hogander@...ia.com>
To:	linux-kernel@...r.kernel.org
Cc:	venkatesh.pallipadi@...el.com
Subject: [PATCH] Do deferrable flag check also for timers in tv2-tv5

Currently deferrable flag is checked only for timers in tv1. This
patch adds check for timers in tv2-tv5 also. This way
__next_timer_interrupt returns value earlier than timer_jiffies +
NEXT_TIMER_MAX_DELTA only if there is a non-deferrable timer
scheduled.

Signed-off-by: Jouni Hogander <jouni.hogander@...ia.com>
Acked-by: Venkatesh Pallipadi <venkatesh.pallipadi@...el.com>
---
 kernel/timer.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/kernel/timer.c b/kernel/timer.c
index ceacc66..929fb36 100644
--- a/kernel/timer.c
+++ b/kernel/timer.c
@@ -861,6 +861,8 @@ cascade:
 		index = slot = timer_jiffies & TVN_MASK;
 		do {
 			list_for_each_entry(nte, varp->vec + slot, entry) {
+				if (tbase_get_deferrable(nte->base))
+					continue;
 				found = 1;
 				if (time_before(nte->expires, expires))
 					expires = nte->expires;
-- 
--
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