diff options
| author | Rafael J. Wysocki <[email protected]> | 2019-02-27 13:35:50 +0000 |
|---|---|---|
| committer | Rafael J. Wysocki <[email protected]> | 2019-03-07 09:54:22 +0000 |
| commit | 814b8797f9863abc2877acf87f6be0f140d00139 (patch) | |
| tree | 6532d58be3f811a5f173ccbb4e6eeed798baf797 /drivers/fpga/zynqmp-fpga.c | |
| parent | Merge tag 'pm-5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafae... (diff) | |
| download | kernel-814b8797f9863abc2877acf87f6be0f140d00139.tar.gz kernel-814b8797f9863abc2877acf87f6be0f140d00139.zip | |
cpuidle: menu: Avoid overflows when computing variance
The variance computation in get_typical_interval() may overflow if
the square of the value of diff exceeds the maximum for the int64_t
data type value which basically is the case when it is of the order
of UINT_MAX.
However, data points so far in the future don't matter for idle
state selection anyway, so change the initial threshold value in
get_typical_interval() to INT_MAX which will cause more "outlying"
data points to be discarded without affecting the selection result.
Reported-by: Randy Dunlap <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
Diffstat (limited to 'drivers/fpga/zynqmp-fpga.c')
0 files changed, 0 insertions, 0 deletions