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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-ia64
parent083576112940fda783d716fd5ccc744f81667b2f (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 'include/asm-ia64')
-rw-r--r--include/asm-ia64/smp.h2
-rw-r--r--include/asm-ia64/topology.h2
2 files changed, 2 insertions, 2 deletions
diff --git a/include/asm-ia64/smp.h b/include/asm-ia64/smp.h
index 6314b29e8c4d..1703c9d885bd 100644
--- a/include/asm-ia64/smp.h
+++ b/include/asm-ia64/smp.h
@@ -58,7 +58,7 @@ extern char no_int_routing __devinitdata;
extern cpumask_t cpu_online_map;
extern cpumask_t cpu_core_map[NR_CPUS];
-extern cpumask_t cpu_sibling_map[NR_CPUS];
+DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
extern int smp_num_siblings;
extern int smp_num_cpucores;
extern void __iomem *ipi_base_addr;
diff --git a/include/asm-ia64/topology.h b/include/asm-ia64/topology.h
index 233f1caae048..2d67b72b18d0 100644
--- a/include/asm-ia64/topology.h
+++ b/include/asm-ia64/topology.h
@@ -112,7 +112,7 @@ void build_cpu_to_node_map(void);
#define topology_physical_package_id(cpu) (cpu_data(cpu)->socket_id)
#define topology_core_id(cpu) (cpu_data(cpu)->core_id)
#define topology_core_siblings(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 smt_capable() (smp_num_siblings > 1)
#endif