From: Ralf Baechle <ralf@linux-mips.org>
Date: Wed, 19 Jun 2013 08:57:33 +0000 (+0200)
Subject: WATCHDOG: sb_wdog: Fix 32 bit build failure
X-Git-Tag: v3.11-rc1~14^2^2~8
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cd6cbde6b01b6e82662cad392c0d177b4af17443;p=pandora-kernel.git

WATCHDOG: sb_wdog: Fix 32 bit build failure

Fixes the following linking problem:
drivers/watchdog/sb_wdog.c:211: undefined reference to `__udivdi3'

This results from reading a 64 bit register, then dividing the value by
1000000.  For 32 bit kernels gcc will use the helper function __udivdi3
from libgcc which the kernel intentionally doesn't provide.

In the read registerbits 23..63 are always zero and only bits 0..22 are
signficant.  So a simple cast to truncate the read value to 32 bits
fixes the issue.

Reported and initial patch by Markos Chandras <markos.chandras@imgtec.com>.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Reported-by: Markos Chandras <markos.chandras@imgtec.com>
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