Messages in this thread | | | Date | Tue, 14 Mar 2017 16:31:47 +0100 | From | Peter Zijlstra <> | Subject | Re: [PATCH] x86, kasan: add KASAN checks to atomic operations |
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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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