Hi Paul,
On Mon, Apr 8, 2024 at 7:49 PM Paul E. McKenney <paulmck@xxxxxxxxxx> wrote:
> Use the new cmpxchg_emu_u8() to emulate one-byte cmpxchg() on xtensa.
>
> [ paulmck: Apply kernel test robot feedback. ]
> [ paulmck: Drop two-byte support per Arnd Bergmann feedback. ]
>
> Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxx>
Thanks for your patch!
> --- a/arch/xtensa/include/asm/cmpxchg.h
> +++ b/arch/xtensa/include/asm/cmpxchg.h
> @@ -74,6 +75,7 @@ static __inline__ unsigned long
> __cmpxchg(volatile void *ptr, unsigned long old, unsigned long new, int size)
> {
> switch (size) {
> + case 1: return cmpxchg_emu_u8((volatile u8 *)ptr, old, new);
The cast is not needed.
> case 4: return __cmpxchg_u32(ptr, old, new);
> default: __cmpxchg_called_with_bad_pointer();
> return old;
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
