On Sat, Apr 17, 2021 at 09:31:32PM +0000, David Laight wrote: > From: Mauro Carvalho Chehab > > Sent: 17 April 2021 19:56 > > > > Em Sat, 17 Apr 2021 21:06:27 +0530 > > Ashish Kalra <eashishkalra@xxxxxxxxx> escreveu: > > > > > Upon running sparse, "warning: dubious: !x | !y" is brought to notice > > > for this file. Logical and bitwise OR are basically the same in this > > > context so it doesn't cause a runtime bug. But let's change it to > > > logical OR to make it cleaner and silence the Sparse warning. > > The old code is very likely to by slightly more efficient. > > It may not matter here, but it might in a really hot path. > > Since !x | !y and !x || !y always have the same value > why is sparse complaining at all. > Smatch doesn't warn about | vs || if both sides are true/false. But I've occasionally asked people if they were trying to do a fast path optimization but it's always just a typo. regards, dan carpenter
