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| author | Mike Travis <travis@sgi.com> | 2007-10-16 01:24:05 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-16 09:42:50 -0700 |
| commit | d5a7430ddcdb598261d70f7eb1bf450b5be52085 (patch) | |
| tree | 3b94672e0dbc2bff125de3266908f1a47a17b795 /include/asm-powerpc | |
| parent | 083576112940fda783d716fd5ccc744f81667b2f (diff) | |
| download | linux-stable-d5a7430ddcdb598261d70f7eb1bf450b5be52085.tar.gz linux-stable-d5a7430ddcdb598261d70f7eb1bf450b5be52085.tar.bz2 linux-stable-d5a7430ddcdb598261d70f7eb1bf450b5be52085.zip | |
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 <travis@sgi.com>
Cc: Andi Kleen <ak@suse.de>
Cc: Christoph Lameter <clameter@sgi.com>
Cc: "Siddha, Suresh B" <suresh.b.siddha@intel.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: "Luck, Tony" <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/asm-powerpc')
| -rw-r--r-- | include/asm-powerpc/smp.h | 4 | ||||
| -rw-r--r-- | include/asm-powerpc/topology.h | 2 |
2 files changed, 4 insertions, 2 deletions
diff --git a/include/asm-powerpc/smp.h b/include/asm-powerpc/smp.h index 19102bfc14ca..505f35bacaa9 100644 --- a/include/asm-powerpc/smp.h +++ b/include/asm-powerpc/smp.h @@ -26,6 +26,7 @@ #ifdef CONFIG_PPC64 #include <asm/paca.h> #endif +#include <asm/percpu.h> 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 0ad21a849b5f..ca23b681ad05 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 <asm/smp.h> -#define topology_thread_siblings(cpu) (cpu_sibling_map[cpu]) +#define topology_thread_siblings(cpu) (per_cpu(cpu_sibling_map, cpu)) #endif #endif |