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authorMike Travis <travis@sgi.com>2007-10-16 01:24:05 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-16 09:42:50 -0700
commitd5a7430ddcdb598261d70f7eb1bf450b5be52085 (patch)
tree3b94672e0dbc2bff125de3266908f1a47a17b795 /include/asm-powerpc
parent083576112940fda783d716fd5ccc744f81667b2f (diff)
downloadlinux-d5a7430ddcdb598261d70f7eb1bf450b5be52085.tar.bz2
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.h4
-rw-r--r--include/asm-powerpc/topology.h2
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