timers: Document meaning of deferrable timer

Steal some text from 6e453a6751 "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: johnstul@us.ibm.com
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
J. Bruce Fields 2010-07-20 15:23:15 -07:00 • committed by Thomas Gleixner
commit 866e26115c