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| author | Wen Yang <wenyang@linux.alibaba.com> | 2020-01-30 21:08:51 +0800 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2020-03-04 10:17:51 +0100 |
| commit | 38f7b0b1316d435f38ec3f2bb078897b7a1cfdea (patch) | |
| tree | 6897b480ecd5caf0a03c1a39904df76fb84eea36 | |
| parent | 4cbbc3a0eeed675449b1a4d080008927121f3da3 (diff) | |
hrtimer: Cast explicitely to u32t in __ktime_divns()
do_div() does a 64-by-32 division at least on 32bit platforms, while the
divisor 'div' is explicitly casted to unsigned long, thus 64-bit on 64-bit
platforms.
The code already ensures that the divisor is less than 2^32. Hence the
proper cast type is u32.
Signed-off-by: Wen Yang <wenyang@linux.alibaba.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20200130130851.29204-1-wenyang@linux.alibaba.com
| -rw-r--r-- | kernel/time/hrtimer.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c index 3a609e7344f3..d74fdcd3ced4 100644 --- a/kernel/time/hrtimer.c +++ b/kernel/time/hrtimer.c @@ -311,7 +311,7 @@ s64 __ktime_divns(const ktime_t kt, s64 div) div >>= 1; } tmp >>= sft; - do_div(tmp, (unsigned long) div); + do_div(tmp, (u32) div); return dclc < 0 ? -tmp : tmp; } EXPORT_SYMBOL_GPL(__ktime_divns); |