[PATCH 01/23] linux: Simplify clock_adjtime

[Alistair Francis]

On Mon, Jul 13, 2020 at 10:10 AM Adhemerval Zanella
<adhemerval.zanella@linaro.org> wrote:
>
> With arch-syscall.h it can now assumes the existance of either
> __NR_clock_adjtime or __NR_clock_adjtime_time64.  The 32-bit time_t
> support is now only build for !__ASSUME_TIME64_SYSCALLS.
>
> Checked on x86_64-linux-gnu and i686-linux-gnu (on 5.4 and on 4.15
> kernel).

Looks good.

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>

Alistair

> ---
>  sysdeps/unix/sysv/linux/clock_adjtime.c | 23 ++++++++++-------------
>  1 file changed, 10 insertions(+), 13 deletions(-)
>
> diff --git a/sysdeps/unix/sysv/linux/clock_adjtime.c b/sysdeps/unix/sysv/linux/clock_adjtime.c
> index 764a60b9bf..4caff2ad05 100644
> --- a/sysdeps/unix/sysv/linux/clock_adjtime.c
> +++ b/sysdeps/unix/sysv/linux/clock_adjtime.c
> @@ -26,15 +26,13 @@
>  int
>  __clock_adjtime64 (const clockid_t clock_id, struct __timex64 *tx64)
>  {
> -#ifdef __ASSUME_TIME64_SYSCALLS
> -# ifndef __NR_clock_adjtime64
> -#  define __NR_clock_adjtime64 __NR_clock_adjtime
> -# endif
> -       return INLINE_SYSCALL_CALL (clock_adjtime64, clock_id, tx64);
> -#else
> -  int ret = INLINE_SYSCALL_CALL (clock_adjtime64, clock_id, tx64);
> -  if (errno != ENOSYS)
> -    return ret;
> +#ifndef __NR_clock_adjtime64
> +# define __NR_clock_adjtime64 __NR_clock_adjtime
> +#endif
> +  int r = INLINE_SYSCALL_CALL (clock_adjtime64, clock_id, tx64);
> +#ifndef __ASSUME_TIME64_SYSCALLS
> +  if (r >= 0 || errno != ENOSYS)
> +    return r;
>
>    if (tx64->modes & ADJ_SETOFFSET
>        && ! in_time_t_range (tx64->time.tv_sec))
> @@ -44,12 +42,11 @@ __clock_adjtime64 (const clockid_t clock_id, struct __timex64 *tx64)
>      }
>
>    struct timex tx32 = valid_timex64_to_timex (*tx64);
> -  int retval = INLINE_SYSCALL_CALL (clock_adjtime, clock_id, &tx32);
> -  if (retval >= 0)
> +  r = INLINE_SYSCALL_CALL (clock_adjtime, clock_id, &tx32);
> +  if (r >= 0)
>      *tx64 = valid_timex_to_timex64 (tx32);
> -
> -  return retval;
>  #endif
> +  return r;
>  }
>
>  #if __TIMESIZE != 64
> --
> 2.25.1
>