+ timersc-document-meaning-of-deferrable-timer.patch added to -mm tree

+ timersc-document-meaning-of-deferrable-timer.patch added to -mm tree

[akpm]

The patch titled
     timers.c: document meaning of deferrable timer
has been added to the -mm tree.  Its filename is
     timersc-document-meaning-of-deferrable-timer.patch

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*** Remember to use Documentation/SubmitChecklist when testing your code ***

See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find
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The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/

------------------------------------------------------
Subject: timers.c: document meaning of deferrable timer
From: J. Bruce Fields <bfields@citi.umich.edu>

Steal some text from 6e453a67510 "Add support for deferrable timers".  A
reader shouldn't have to dig through the git logs for the basic
description of a deferrable timer.

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 kernel/timer.c |    9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff -puN kernel/timer.c~timersc-document-meaning-of-deferrable-timer kernel/timer.c
--- a/kernel/timer.c~timersc-document-meaning-of-deferrable-timer
+++ a/kernel/timer.c
@@ -90,8 +90,13 @@ static DEFINE_PER_CPU(struct tvec_base *
 
 /*
  * Note that all tvec_bases are 2 byte aligned and lower bit of
- * base in timer_list is guaranteed to be zero. Use the LSB for
- * the new flag to indicate whether the timer is deferrable
+ * base in timer_list is guaranteed to be zero. Use the LSB to
+ * indicate whether the timer is deferrable.
+ *
+ * A deferrable timer will work normally when the system is busy, but
+ * will not cause a CPU to come out of idle just to service it; instead,
+ * the timer will be serviced when the CPU eventually wakes up with a
+ * subsequent non-deferrable timer.
  */
 #define TBASE_DEFERRABLE_FLAG		(0x1)
 
_

Patches currently in -mm which might be from bfields@citi.umich.edu are

linux-next.patch
timersc-document-meaning-of-deferrable-timer.patch
reiser4.patch