On 19.01.21 19:03, Jason Gunthorpe wrote:
On Tue, Jan 19, 2021 at 06:24:49PM +0100, Bodo Stroesser wrote:I had a second look into math.h, but I don't find any reason why round_up could overflow. Can you give a hint please?#define round_up(x, y) ((((x)-1) | __round_mask(x, y))+1) ^^^^^ That +1 can overflow
But that would be a unsigned long long overflow. I considered this to not be relevant.
It looks like it would not be so bad to implement some check_round_up_overflow() if people prefer Jason
