diff options
| 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-x86 | |
| parent | x86: Convert cpu_core_map to be a per cpu variable (diff) | |
| download | linux-dev-d5a7430ddcdb598261d70f7eb1bf450b5be52085.tar.xz linux-dev-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-x86')
| -rw-r--r-- | include/asm-x86/smp_32.h | 2 | ||||
| -rw-r--r-- | include/asm-x86/smp_64.h | 6 | ||||
| -rw-r--r-- | include/asm-x86/topology_32.h | 2 | ||||
| -rw-r--r-- | include/asm-x86/topology_64.h | 2 |
4 files changed, 7 insertions, 5 deletions
diff --git a/include/asm-x86/smp_32.h b/include/asm-x86/smp_32.h index 01ab31bb262a..955dd7c8538f 100644 --- a/include/asm-x86/smp_32.h +++ b/include/asm-x86/smp_32.h @@ -30,7 +30,7 @@ extern void smp_alloc_memory(void); extern int pic_mode; extern int smp_num_siblings; -extern cpumask_t cpu_sibling_map[]; +DECLARE_PER_CPU(cpumask_t, cpu_sibling_map); DECLARE_PER_CPU(cpumask_t, cpu_core_map); extern void (*mtrr_hook) (void); diff --git a/include/asm-x86/smp_64.h b/include/asm-x86/smp_64.h index 65f844864415..f5bcee1c0927 100644 --- a/include/asm-x86/smp_64.h +++ b/include/asm-x86/smp_64.h @@ -38,12 +38,14 @@ extern void unlock_ipi_call_lock(void); extern int smp_num_siblings; extern void smp_send_reschedule(int cpu); -extern cpumask_t cpu_sibling_map[NR_CPUS]; /* - * cpu_core_map lives in a per cpu area + * cpu_sibling_map and cpu_core_map now live + * in the per cpu area * + * extern cpumask_t cpu_sibling_map[NR_CPUS]; * extern cpumask_t cpu_core_map[NR_CPUS]; */ +DECLARE_PER_CPU(cpumask_t, cpu_sibling_map); DECLARE_PER_CPU(cpumask_t, cpu_core_map); extern u8 cpu_llc_id[NR_CPUS]; diff --git a/include/asm-x86/topology_32.h b/include/asm-x86/topology_32.h index 7b68dbcd0eb0..ae1074603c4b 100644 --- a/include/asm-x86/topology_32.h +++ b/include/asm-x86/topology_32.h @@ -31,7 +31,7 @@ #define topology_physical_package_id(cpu) (cpu_data[cpu].phys_proc_id) #define topology_core_id(cpu) (cpu_data[cpu].cpu_core_id) #define topology_core_siblings(cpu) (per_cpu(cpu_core_map, cpu)) -#define topology_thread_siblings(cpu) (cpu_sibling_map[cpu]) +#define topology_thread_siblings(cpu) (per_cpu(cpu_sibling_map, cpu)) #endif #ifdef CONFIG_NUMA diff --git a/include/asm-x86/topology_64.h b/include/asm-x86/topology_64.h index b8590dff34c8..848c17f92226 100644 --- a/include/asm-x86/topology_64.h +++ b/include/asm-x86/topology_64.h @@ -59,7 +59,7 @@ extern int __node_distance(int, int); #define topology_physical_package_id(cpu) (cpu_data[cpu].phys_proc_id) #define topology_core_id(cpu) (cpu_data[cpu].cpu_core_id) #define topology_core_siblings(cpu) (per_cpu(cpu_core_map, cpu)) -#define topology_thread_siblings(cpu) (cpu_sibling_map[cpu]) +#define topology_thread_siblings(cpu) (per_cpu(cpu_sibling_map, cpu)) #define mc_capable() (boot_cpu_data.x86_max_cores > 1) #define smt_capable() (smp_num_siblings > 1) #endif |