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| author | Dan Carpenter <dan.carpenter@oracle.com> | 2014-10-29 11:42:50 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-11-07 11:24:01 -0800 |
| commit | d0439a5442cf43434d87faf34f4d2c19d3aba88a (patch) | |
| tree | c55e84e8a30902fbbec6f87d7990be039ec23045 /drivers/char/hangcheck-timer.c | |
| parent | d25221525e0e2cfd70e4ec7216549c06609a8bd2 (diff) | |
| download | linux-d0439a5442cf43434d87faf34f4d2c19d3aba88a.tar.bz2 | |
hangcheck-timer: cleanup casting in hangcheck_init()
The 32 bit addition "(hangcheck_margin + hangcheck_tick)" could
potentially overflow. It triggers a static checker warning to have an
overflowed addition followed by a no-op cast. I have moved the cast so
that the addition can't overflow.
Also I removed the unneeded cast on the following line since both
"hangcheck_tsc_margin" and "TIMER_FREQ" are already 64 bit types.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/char/hangcheck-timer.c')
| -rw-r--r-- | drivers/char/hangcheck-timer.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/char/hangcheck-timer.c b/drivers/char/hangcheck-timer.c index ebc4c73d8ca4..a7c5c59675f0 100644 --- a/drivers/char/hangcheck-timer.c +++ b/drivers/char/hangcheck-timer.c @@ -168,8 +168,8 @@ static int __init hangcheck_init(void) printk("Hangcheck: starting hangcheck timer %s (tick is %d seconds, margin is %d seconds).\n", VERSION_STR, hangcheck_tick, hangcheck_margin); hangcheck_tsc_margin = - (unsigned long long)(hangcheck_margin + hangcheck_tick); - hangcheck_tsc_margin *= (unsigned long long)TIMER_FREQ; + (unsigned long long)hangcheck_margin + hangcheck_tick; + hangcheck_tsc_margin *= TIMER_FREQ; hangcheck_tsc = ktime_get_ns(); mod_timer(&hangcheck_ticktock, jiffies + (hangcheck_tick*HZ)); |