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SubjectRe: [PATCH v2 5/8] lib: vdso: Remove checks on return value for 32 bit vDSO
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On 30/08/2019 14:58, Vincenzo Frascino wrote:
> Since all the architectures that support the generic vDSO library have
> been converted to support the 32 bit fallbacks it is not required
> anymore to check the return value of __cvdso_clock_get*time32_common()
> before updating the old_timespec fields.
>
> Remove the related checks from the generic vdso library.
>
> Cc: Thomas Gleixner <tglx@linutronix.de>
> CC: Andy Lutomirski <luto@kernel.org>

Forgot to add to this patch:

Suggested-by: Andy Lutomirski <luto@kernel.org>

> References: c60a32ea4f45 ("lib/vdso/32: Provide legacy syscall fallbacks")
> Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
> ---
> lib/vdso/gettimeofday.c | 16 ++++++++--------
> 1 file changed, 8 insertions(+), 8 deletions(-)
>
> diff --git a/lib/vdso/gettimeofday.c b/lib/vdso/gettimeofday.c
> index 2c4b311c226d..d5bc16748f81 100644
> --- a/lib/vdso/gettimeofday.c
> +++ b/lib/vdso/gettimeofday.c
> @@ -129,10 +129,10 @@ __cvdso_clock_gettime32(clockid_t clock, struct old_timespec32 *res)
> if (unlikely(ret))
> return clock_gettime32_fallback(clock, res);
>
> - if (likely(!ret)) {
> - res->tv_sec = ts.tv_sec;
> - res->tv_nsec = ts.tv_nsec;
> - }
> + /* For ret == 0 */
> + res->tv_sec = ts.tv_sec;
> + res->tv_nsec = ts.tv_nsec;
> +
> return ret;
> }
> #endif /* BUILD_VDSO32 */
> @@ -238,10 +238,10 @@ __cvdso_clock_getres_time32(clockid_t clock, struct old_timespec32 *res)
> if (unlikely(ret))
> return clock_getres32_fallback(clock, res);
>
> - if (likely(!ret)) {
> - res->tv_sec = ts.tv_sec;
> - res->tv_nsec = ts.tv_nsec;
> - }
> + /* For ret == 0 */
> + res->tv_sec = ts.tv_sec;
> + res->tv_nsec = ts.tv_nsec;
> +
> return ret;
> }
> #endif /* BUILD_VDSO32 */
>

--
Regards,
Vincenzo

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