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 /arch/sparc64 | |
| parent | 083576112940fda783d716fd5ccc744f81667b2f (diff) | |
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 'arch/sparc64')
| -rw-r--r-- | arch/sparc64/kernel/smp.c | 17 |
1 files changed, 8 insertions, 9 deletions
diff --git a/arch/sparc64/kernel/smp.c b/arch/sparc64/kernel/smp.c index c73b7a48b036..407d74a8a542 100644 --- a/arch/sparc64/kernel/smp.c +++ b/arch/sparc64/kernel/smp.c @@ -52,14 +52,13 @@ int sparc64_multi_core __read_mostly; cpumask_t cpu_possible_map __read_mostly = CPU_MASK_NONE; cpumask_t cpu_online_map __read_mostly = CPU_MASK_NONE; -cpumask_t cpu_sibling_map[NR_CPUS] __read_mostly = - { [0 ... NR_CPUS-1] = CPU_MASK_NONE }; +DEFINE_PER_CPU(cpumask_t, cpu_sibling_map) = CPU_MASK_NONE; cpumask_t cpu_core_map[NR_CPUS] __read_mostly = { [0 ... NR_CPUS-1] = CPU_MASK_NONE }; EXPORT_SYMBOL(cpu_possible_map); EXPORT_SYMBOL(cpu_online_map); -EXPORT_SYMBOL(cpu_sibling_map); +EXPORT_PER_CPU_SYMBOL(cpu_sibling_map); EXPORT_SYMBOL(cpu_core_map); static cpumask_t smp_commenced_mask; @@ -1261,16 +1260,16 @@ void __devinit smp_fill_in_sib_core_maps(void) for_each_present_cpu(i) { unsigned int j; - cpus_clear(cpu_sibling_map[i]); + cpus_clear(per_cpu(cpu_sibling_map, i)); if (cpu_data(i).proc_id == -1) { - cpu_set(i, cpu_sibling_map[i]); + cpu_set(i, per_cpu(cpu_sibling_map, i)); continue; } for_each_present_cpu(j) { if (cpu_data(i).proc_id == cpu_data(j).proc_id) - cpu_set(j, cpu_sibling_map[i]); + cpu_set(j, per_cpu(cpu_sibling_map, i)); } } } @@ -1342,9 +1341,9 @@ int __cpu_disable(void) cpu_clear(cpu, cpu_core_map[i]); cpus_clear(cpu_core_map[cpu]); - for_each_cpu_mask(i, cpu_sibling_map[cpu]) - cpu_clear(cpu, cpu_sibling_map[i]); - cpus_clear(cpu_sibling_map[cpu]); + for_each_cpu_mask(i, per_cpu(cpu_sibling_map, cpu)) + cpu_clear(cpu, per_cpu(cpu_sibling_map, i)); + cpus_clear(per_cpu(cpu_sibling_map, cpu)); c = &cpu_data(cpu); |