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hrtimer: Cast explicitely to u32t in __ktime_divns()

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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
This commit is contained in:
Wen Yang 2020-01-30 21:08:51 +08:00 committed by Thomas Gleixner
parent 4cbbc3a0ee
commit 38f7b0b131
1 changed files with 1 additions and 1 deletions
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2
kernel/time/hrtimer.c
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@ -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);