tree 5de4f91d61a4d454eefa352ff18716a5dd0a055c
parent 277a05f83af8c82291cf5f2ad0c2dd1aa6f29de7
author Martin Schwidefsky <schwidefsky@de.ibm.com> 1323957370 +0100
committer Greg Kroah-Hartman <gregkh@suse.de> 1327541093 -0800

fix cputime overflow in uptime_proc_show

commit c3e0ef9a298e028a82ada28101ccd5cf64d209ee upstream.

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: Michael Abbott <michael.abbott@diamond.ac.uk>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>