From d5a7430ddcdb598261d70f7eb1bf450b5be52085 Mon Sep 17 00:00:00 2001 From: Mike Travis Date: Tue, 16 Oct 2007 01:24:05 -0700 Subject: Convert cpu_sibling_map to be a per cpu variable Convert cpu_sibling_map from a static array sized by NR_CPUS to a per_cpu variable. This saves sizeof(cpumask_t) * NR unused cpus. Access is mostly from startup and CPU HOTPLUG functions. Signed-off-by: Mike Travis Cc: Andi Kleen Cc: Christoph Lameter Cc: "Siddha, Suresh B" Cc: "David S. Miller" Cc: Paul Mackerras Cc: Benjamin Herrenschmidt Cc: "Luck, Tony" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/asm-powerpc/smp.h | 4 +++- include/asm-powerpc/topology.h | 2 +- 2 files changed, 4 insertions(+), 2 deletions(-) (limited to 'include/asm-powerpc') diff --git a/include/asm-powerpc/smp.h b/include/asm-powerpc/smp.h index 19102bfc14c..505f35bacaa 100644 --- a/include/asm-powerpc/smp.h +++ b/include/asm-powerpc/smp.h @@ -26,6 +26,7 @@ #ifdef CONFIG_PPC64 #include #endif +#include extern int boot_cpuid; @@ -58,7 +59,7 @@ extern int smp_hw_index[]; (smp_hw_index[(cpu)] = (phys)) #endif -extern cpumask_t cpu_sibling_map[NR_CPUS]; +DECLARE_PER_CPU(cpumask_t, cpu_sibling_map); /* Since OpenPIC has only 4 IPIs, we use slightly different message numbers. * @@ -77,6 +78,7 @@ void smp_init_pSeries(void); void smp_init_cell(void); void smp_init_celleb(void); void smp_setup_cpu_maps(void); +void smp_setup_cpu_sibling_map(void); extern int __cpu_disable(void); extern void __cpu_die(unsigned int cpu); diff --git a/include/asm-powerpc/topology.h b/include/asm-powerpc/topology.h index 0ad21a849b5..ca23b681ad0 100644 --- a/include/asm-powerpc/topology.h +++ b/include/asm-powerpc/topology.h @@ -108,7 +108,7 @@ static inline void sysfs_remove_device_from_node(struct sys_device *dev, #ifdef CONFIG_PPC64 #include -#define topology_thread_siblings(cpu) (cpu_sibling_map[cpu]) +#define topology_thread_siblings(cpu) (per_cpu(cpu_sibling_map, cpu)) #endif #endif -- cgit v1.2.3