From 38f7b0b1316d435f38ec3f2bb078897b7a1cfdea Mon Sep 17 00:00:00 2001 From: Wen Yang <wenyang@linux.alibaba.com> Date: Thu, 30 Jan 2020 21:08:51 +0800 Subject: 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 --- kernel/time/hrtimer.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'kernel/time/hrtimer.c') 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); -- cgit v1.2.3-58-ga151