From: Martin Schwidefsky <schwidefsky@de.ibm.com>
Date: Thu, 15 Dec 2011 13:56:10 +0000 (+0100)
Subject: [S390] fix cputime overflow in uptime_proc_show
X-Git-Tag: v3.3-rc1~191^2~10
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c3e0ef9a298e028a82ada28101ccd5cf64d209ee;p=pandora-kernel.git

[S390] fix cputime overflow in uptime_proc_show

For 32-bit architectures using standard jiffies the idletime calculation
in uptime_proc_show will quickly overflow. It takes (2^32 / HZ) seconds
of idle-time, or e.g. 12.45 days with no load on a quad-core with HZ=1000.
Switch to 64-bit calculations.

Cc: stable@vger.kernel.org
Cc: Michael Abbott <michael.abbott@diamond.ac.uk>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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