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Groups > linux.kernel > #1734887
| From | Dmitry Vyukov <dvyukov@google.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH 2/3] kcov: remove pointless current != NULL check |
| Date | 2017-09-19 15:00 +0200 |
| Message-ID | <urqi5-5B6-1@gated-at.bofh.it> (permalink) |
| References | <urqi5-5B6-3@gated-at.bofh.it> <urqi5-5B6-5@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Tue, Sep 19, 2017 at 2:46 PM, Andrey Ryabinin
<aryabinin@virtuozzo.com> wrote:
> __sanitizer_cov_trace_pc() is a hot code, so it's worth
> to remove pointless '!current' check. Current is never NULL.
>
> Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Acked-by: Dmitry Vyukov <dvyukov@google.com>
> ---
> kernel/kcov.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/kernel/kcov.c b/kernel/kcov.c
> index 2f0e7a7c7afc..14cc8c1a7cad 100644
> --- a/kernel/kcov.c
> +++ b/kernel/kcov.c
> @@ -61,7 +61,7 @@ void notrace __sanitizer_cov_trace_pc(void)
> * We are interested in code coverage as a function of a syscall inputs,
> * so we ignore code executed in interrupts.
> */
> - if (!t || !in_task())
> + if (!in_task())
> return;
> mode = READ_ONCE(t->kcov_mode);
> if (mode == KCOV_MODE_TRACE) {
> --
> 2.13.5
>
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Re: [PATCH 2/3] kcov: remove pointless current != NULL check Dmitry Vyukov <dvyukov@google.com> - 2017-09-19 15:00 +0200
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