timekeeping: Prevent 32bit truncation in scale64_check_overflow()

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While unlikely the divisor in scale64_check_overflow() could be >= 32bit in
scale64_check_overflow(). do_div() truncates the divisor to 32bit at least
on 32bit platforms.

Use div64_u64() instead to avoid the truncation to 32-bit.

[ tglx: Massaged changelog ]

Signed-off-by: Wen Yang <wenyang@linux.alibaba.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20200120100523.45656-1-wenyang@linux.alibaba.com

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Wen Yang 2020-01-20 18:05:23 +08:00 • committed by Thomas Gleixner

parent b95e31c07c

commit 4cbbc3a0ee

1 changed files with 1 additions and 2 deletions

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kernel/time/timekeeping.c

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