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SubjectRe: [Patch 6/23] mask v2 - Replace cpumask_t with one using mask
Matthew wrote:
> a better way to do this for UP.
> +#define cpu_online_map \
> +({ \
> + cpumask_t m = MASK_ALL1(NR_CPUS); \
> + m; \
> +})

This only helps cpu_online_map and cpu_possible_map, and only on UP's.

My controversial patch 24/23 helps all MASK_ALL based initializations,
and all mask_of_bit based initializations, for all systems up to 32 CPUs
(or 64, depending on sizeof(long)).

In particular, grep for 'cpumask_of_cpu(0)' in the kernel. You will find
many hits. This should be efficient for all 'normal' sized systems.

I won't rest till it's the best ...
Programmer, Linux Scalability
Paul Jackson <> 1.650.933.1373
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