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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 /arch/x86/xen/smp.c | |
| parent | 083576112940fda783d716fd5ccc744f81667b2f (diff) | |
| download | op-kernel-dev-d5a7430ddcdb598261d70f7eb1bf450b5be52085.zip op-kernel-dev-d5a7430ddcdb598261d70f7eb1bf450b5be52085.tar.gz | |
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/x86/xen/smp.c')
| -rw-r--r-- | arch/x86/xen/smp.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c index 539d425..4fa33c2 100644 --- a/arch/x86/xen/smp.c +++ b/arch/x86/xen/smp.c @@ -147,7 +147,7 @@ void __init xen_smp_prepare_boot_cpu(void) make_lowmem_page_readwrite(&per_cpu__gdt_page); for (cpu = 0; cpu < NR_CPUS; cpu++) { - cpus_clear(cpu_sibling_map[cpu]); + cpus_clear(per_cpu(cpu_sibling_map, cpu)); /* * cpu_core_map lives in a per cpu area that is cleared * when the per cpu array is allocated. @@ -164,7 +164,7 @@ void __init xen_smp_prepare_cpus(unsigned int max_cpus) unsigned cpu; for (cpu = 0; cpu < NR_CPUS; cpu++) { - cpus_clear(cpu_sibling_map[cpu]); + cpus_clear(per_cpu(cpu_sibling_map, cpu)); /* * cpu_core_ map will be zeroed when the per * cpu area is allocated. |
