From: Nicolas Pitre <nico@cam.org>
Date: Mon, 4 Dec 2006 19:29:21 +0000 (+0100)
Subject: [ARM] 3980/1: extend the ARM Versatile sched_clock implementation from 32 to 63 bit
X-Git-Tag: v2.6.20-rc1~34^2~412^2~1^2^5~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=752bee178ee107aa3dd87a9aeba970444034c6fb;p=pandora-kernel.git

[ARM] 3980/1: extend the ARM Versatile sched_clock implementation from 32 to 63 bit
 period

This provides a 63 bit clock counter guaranteed to be monotonic over a
period of 35583 days instead of a clock wrap every 179 seconds, as long
as sched_clock() is called at least once every 89 seconds.  This should
not be a problem in practice, although a kernel timer could be scheduled
every 80 seconds for example simply to call sched_clock() making sure
top bits are always synchronized if need be.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---

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