Re: [PATCH] powerpc: sysdev: cpm1: Optimise gpio bit calculation

[Christophe LEROY]

Le 10/03/2017 à 14:06, Segher Boessenkool a écrit :
> On Fri, Mar 10, 2017 at 11:54:19AM +0100, Christophe LEROY wrote:
> > gpio_get() and gpio_set() are used extensively by some GPIO based
> > drivers like SPI, NAND, so it may be worth it as it doesn't impair
> > readability (if anyone prefers, we could write  (1 << 31) >> i  instead
> > of  0x80000000 >> i )
>
> 1 << 31 is undefined behaviour, of course.

Shall it be 1U << 31 ?

Christophe