Re: [PATCH v2] parisc: Rewrite light-weight syscall and futex code

[John David Anglin <dave.anglin@xxxxxxxx>]

On 2021-12-23 3:14 p.m., John David Anglin wrote:
> -static inline bool _futex_force_interruptions(unsigned long ua)
> +static inline unsigned long _futex_force_interruptions(unsigned long ua)
>    {
> -    bool result;
> +    register unsigned long error __asm__ ("r8") = 0;
> +    register unsigned long temp;
>
>        __asm__ __volatile__(
> -        "1:\tldw 0(%1), %0\n"
We can avoid two variables if we clear the return value after ldw.
> -        "2:\tstbys,e %%r0, 0(%1)\n"
> -        "\tcomclr,= %%r0, %%r0, %0\n"
> -        "3:\tldi 1, %0\n"

Dave

--
John David Anglin  dave.anglin@xxxxxxxx