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authorDavid S. Miller <davem@davemloft.net>2005-10-13 14:41:23 -0700
committerDavid S. Miller <davem@davemloft.net>2005-10-13 14:41:23 -0700
commitc8923c6b852d3a97c1faad0566e38fca330375a7 (patch)
treeeb79e97c5468bba641c7a34b83514876f4902cf2 /include/linux/cpumask.h
parentc931488cc4619eecfe68a2f046b5898fddc2f904 (diff)
downloadop-kernel-dev-c8923c6b852d3a97c1faad0566e38fca330375a7.zip
op-kernel-dev-c8923c6b852d3a97c1faad0566e38fca330375a7.tar.gz
[NETFILTER]: Fix OOPSes on machines with discontiguous cpu numbering.
Original patch by Harald Welte, with feedback from Herbert Xu and testing by Sébastien 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>
Diffstat (limited to 'include/linux/cpumask.h')
-rw-r--r--include/linux/cpumask.h12
1 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/cpumask.h b/include/linux/cpumask.h
index b15826f..fe97783 100644
--- a/include/linux/cpumask.h
+++ b/include/linux/cpumask.h
@@ -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 */
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