[patch 2/7] timer: Remove FIFO guarantee

[Thomas Gleixner]

The FIFO guarantee has been violated by the introduction of timer
slack already. Remove it.

This is a preparatory patch for converting the timer wheel to hlist
which reduces the memory foot print of the wheel by 50%. It's a
seperate patch so any (unlikely to happen) regression caused by this
can be identified clearly.

Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
 kernel/time/timer.c |    6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

Index: tip/kernel/time/timer.c
===================================================================
--- tip.orig/kernel/time/timer.c
+++ tip/kernel/time/timer.c
@@ -403,10 +403,8 @@ __internal_add_timer(struct tvec_base *b
 		i = (expires >> (TVR_BITS + 3 * TVN_BITS)) & TVN_MASK;
 		vec = base->tv5.vec + i;
 	}
-	/*
-	 * Timers are FIFO:
-	 */
-	list_add_tail(&timer->entry, vec);
+
+	list_add(&timer->entry, vec);
 }
 
 static void internal_add_timer(struct tvec_base *base, struct timer_list *timer)


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