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authorMike Travis <travis@sgi.com>2008-03-31 08:41:55 -0700
committerIngo Molnar <mingo@elte.hu>2008-04-19 19:44:58 +0200
commitaa6b54461cc5c0019b9d792adf3176b444c10763 (patch)
tree069955d970b078105dcae6706a9e97c5503900df /include/asm-x86/topology.h
parentd18d00f5dbcd1a95811617e9812cf0560bd465ee (diff)
asm-generic: add node_to_cpumask_ptr macro
Create a simple macro to always return a pointer to the node_to_cpumask(node) value. This relies on compiler optimization to remove the extra indirection: #define node_to_cpumask_ptr(v, node) \ cpumask_t _##v = node_to_cpumask(node), *v = &_##v For those systems with a large cpumask size, then a true pointer to the array element can be used: #define node_to_cpumask_ptr(v, node) \ cpumask_t *v = &(node_to_cpumask_map[node]) A node_to_cpumask_ptr_next() macro is provided to access another node_to_cpumask value. The other change is to always include asm-generic/topology.h moving the ifdef CONFIG_NUMA to this same file. Note: there are no references to either of these new macros in this patch, only the definition. Based on 2.6.25-rc5-mm1 # alpha Cc: Richard Henderson <rth@twiddle.net> # fujitsu Cc: David Howells <dhowells@redhat.com> # ia64 Cc: Tony Luck <tony.luck@intel.com> # powerpc Cc: Paul Mackerras <paulus@samba.org> Cc: Anton Blanchard <anton@samba.org> # sparc Cc: David S. Miller <davem@davemloft.net> Cc: William L. Irwin <wli@holomorphy.com> # x86 Cc: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Mike Travis <travis@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/asm-x86/topology.h')
-rw-r--r--include/asm-x86/topology.h15
1 files changed, 13 insertions, 2 deletions
diff --git a/include/asm-x86/topology.h b/include/asm-x86/topology.h
index 81a29eb08ac4..b167ca90f96f 100644
--- a/include/asm-x86/topology.h
+++ b/include/asm-x86/topology.h
@@ -88,6 +88,17 @@ static inline int cpu_to_node(int cpu)
#endif
return per_cpu(x86_cpu_to_node_map, cpu);
}
+
+#ifdef CONFIG_NUMA
+
+/* Returns a pointer to the cpumask of CPUs on Node 'node'. */
+#define node_to_cpumask_ptr(v, node) \
+ cpumask_t *v = &(node_to_cpumask_map[node])
+
+#define node_to_cpumask_ptr_next(v, node) \
+ v = &(node_to_cpumask_map[node])
+#endif
+
#endif /* CONFIG_X86_64 */
/*
@@ -174,10 +185,10 @@ extern int __node_distance(int, int);
#else /* CONFIG_NUMA */
-#include <asm-generic/topology.h>
-
#endif
+#include <asm-generic/topology.h>
+
extern cpumask_t cpu_coregroup_map(int cpu);
#ifdef ENABLE_TOPO_DEFINES