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Groups > linux.kernel > #1600622
| From | Peter Zijlstra <peterz@infradead.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH] x86, kasan: add KASAN checks to atomic operations |
| Date | 2017-03-14 16:40 +0100 |
| Message-ID | <tkWIj-25L-27@gated-at.bofh.it> (permalink) |
| References | (5 earlier) <ti83f-5wO-5@gated-at.bofh.it> <tiLHj-8qM-7@gated-at.bofh.it> <tiLHj-8qM-9@gated-at.bofh.it> <tiOOS-1ZF-5@gated-at.bofh.it> <tkWyD-20n-39@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Tue, Mar 14, 2017 at 04:22:52PM +0100, Dmitry Vyukov wrote:
> Any other suggestions?
> - return i + xadd(&v->counter, i);
> + return i + arch_xadd(&v->counter, i);
> +#define xadd(ptr, v) \
> +({ \
> + __typeof__(ptr) ____ptr = (ptr); \
> + kasan_check_write(____ptr, sizeof(*____ptr)); \
> + arch_xadd(____ptr, (v)); \
> +})
xadd() isn't a generic thing, it only exists inside x86 as a helper to
implement atomic bits.
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Re: [PATCH] x86, kasan: add KASAN checks to atomic operations Peter Zijlstra <peterz@infradead.org> - 2017-03-14 16:40 +0100
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