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[S390] fix cputime overflow in uptime_proc_show
authorMartin Schwidefsky <schwidefsky@de.ibm.com>
Thu, 15 Dec 2011 13:56:10 +0000 (14:56 +0100)
committerMartin Schwidefsky <schwidefsky@de.ibm.com>
Thu, 15 Dec 2011 13:56:19 +0000 (14:56 +0100)
commitc3e0ef9a298e028a82ada28101ccd5cf64d209ee
tree6a03a5df3e33ccdfda9b0794eef364afe36211f6tree | snapshot (tar.gz zip)
parent648616343cdbe904c585a6c12e323d3b3c72e46fcommit | diff
[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>
fs/proc/uptime.c diff | blob | blame | history