From c8923c6b852d3a97c1faad0566e38fca330375a7 Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Thu, 13 Oct 2005 14:41:23 -0700 Subject: [NETFILTER]: Fix OOPSes on machines with discontiguous cpu numbering. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 --- include/linux/cpumask.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'include/linux/cpumask.h') diff --git a/include/linux/cpumask.h b/include/linux/cpumask.h index b15826f6e3a..fe9778301d0 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 */ -- cgit v1.2.3