Messages in this thread | | | Date | Thu, 15 Jan 2009 11:04:17 +0100 | From | "roel kluin" <> | Subject | Re: [patch] add optimized generic percpu accessors |
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> Index: linux/include/asm-generic/percpu.h > =================================================================== > --- linux.orig/include/asm-generic/percpu.h > +++ linux/include/asm-generic/percpu.h > @@ -80,4 +80,32 @@ extern void setup_per_cpu_areas(void); > #define DECLARE_PER_CPU(type, name) extern PER_CPU_ATTRIBUTES \ > __typeof__(type) per_cpu_var(name) > > +/* > + * Optional methods for optimized non-lvalue per-cpu variable access: > + */ > + > +#ifndef percpu_read > +# define percpu_read(var) __get_cpu_var(var) > +#endif > + > +#ifndef percpu_write > +# define percpu_write(var, val) ({ __get_cpu_var(var) = (val); }) > +#endif > + > +#ifndef percpu_add > +# define percpu_add(var, val) ({ __get_cpu_var(var) += (val); }) > +#endif > + > +#ifndef percpu_sub > +# define percpu_add(var, val) ({ __get_cpu_var(var) += (val); })
this should be:
define percpu_sub(var, val) ({ __get_cpu_var(var) -= (val); })
> +#endif > + > +#ifndef percpu_or > +# define percpu_or(var, val) ({ __get_cpu_var(var) |= (val); }) > +#endif > + > +#ifndef percpu_xor > +# define percpu_xor(var, val) ({ __get_cpu_var(var) ^= (val); }) > +#endif > + > #endif /* _ASM_GENERIC_PERCPU_H_ */ > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ >
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