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powerpc/mpic: Limit NR_CPUS loop to 32 bit

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mpic_physmask was looping NR_CPUS times over a mask that was passed as
a u32. Since mpic is architecturaly limited to 32 physical cpus, clamp
the logical cpus to 32 when compiling (we could also clamp at runtime
to nr_cpu_ids).

Signed-off-by: Milton Miller <miltonm@bga.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Milton Miller 2011-05-10 19:28:59 +00:00 committed by Benjamin Herrenschmidt
parent aa79bc2167
commit ebc0421510
1 changed files with 1 additions and 1 deletions
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2
arch/powerpc/sysdev/mpic.c
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@ -631,7 +631,7 @@ static inline u32 mpic_physmask(u32 cpumask)
int i;
u32 mask = 0;
for (i = 0; i < NR_CPUS; ++i, cpumask >>= 1)
for (i = 0; i < min(32, NR_CPUS); ++i, cpumask >>= 1)
mask |= (cpumask & 1) << get_hard_smp_processor_id(i);
return mask;
}