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[NETFILTER]: Fix OOPSes on machines with discontiguous cpu numbering.

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Original patch by Harald Welte, with feedback from Herbert Xu
and testing by Sbastien Bernard.

EBTABLES, ARP tables, and IP/IP6 tables all assume that cpus
are numbered linearly.  That is not necessarily true.

This patch fixes that up by calculating the largest possible
cpu number, and allocating enough per-cpu structure space given
that.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
2005-10-13 14:41:23 -07:00
parent c931488cc4
commit c8923c6b85
7 changed files with 65 additions and 26 deletions
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12
include/linux/cpumask.h
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@@ -392,4 +392,16 @@ extern cpumask_t cpu_present_map;
#define for_each_online_cpu(cpu) for_each_cpu_mask((cpu), cpu_online_map)
#define for_each_present_cpu(cpu) for_each_cpu_mask((cpu), cpu_present_map)
/* Find the highest possible smp_processor_id() */
static inline unsigned int highest_possible_processor_id(void)
{
unsigned int cpu, highest = 0;
for_each_cpu_mask(cpu, cpu_possible_map)
highest = cpu;
return highest;
}
#endif /* __LINUX_CPUMASK_H */