On Fri, Apr 22, 2016 at 11:04:23AM +0200, Peter Zijlstra wrote:
> +#define ATOMIC_FETCH_OP(op) \
> +static inline int atomic_fetch_##op(int i, atomic_t *v) \
> +{ \
> + int output, val; \
> + \
> + __asm__ __volatile__ ( \
> + "1: %0 = memw_locked(%2);\n" \
> + " %1 = "#op "(%0,%3);\n" \
> + " memw_locked(%2,P3)=%0;\n" \
I'm thinking that wants to be:
memw_locked(%2,P3)=%1;
> + " if !P3 jump 1b;\n" \
> + : "=&r" (output), "=&r" (val) \
> + : "r" (&v->counter), "r" (i) \
> + : "memory", "p3" \
> + ); \
> + return output; \
> +}
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