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| author |   Mike Travis <travis@sgi.com> | 2008-03-31 08:41:55 -0700 |
|---|---|---|
| committer |   Ingo Molnar <mingo@elte.hu> | 2008-04-19 19:44:58 +0200 |
| commit | aa6b54461cc5c0019b9d792adf3176b444c10763 (patch) | |
| tree | 069955d970b078105dcae6706a9e97c5503900df /include/asm-generic/topology.h | |
| parent | x86: oprofile: remove NR_CPUS arrays in arch/x86/oprofile/nmi_int.c (diff) | |
| download | wireguard-linux-aa6b54461cc5c0019b9d792adf3176b444c10763.tar.xz wireguard-linux-aa6b54461cc5c0019b9d792adf3176b444c10763.zip | |
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-generic/topology.h')
| -rw-r--r-- | include/asm-generic/topology.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/asm-generic/topology.h b/include/asm-generic/topology.h index 342a2a0105c4..a6aea79bca4f 100644 --- a/include/asm-generic/topology.h +++ b/include/asm-generic/topology.h @@ -27,6 +27,8 @@ #ifndef _ASM_GENERIC_TOPOLOGY_H #define _ASM_GENERIC_TOPOLOGY_H +#ifndef CONFIG_NUMA + /* Other architectures wishing to use this simple topology API should fill in the below functions as appropriate in their own <asm/topology.h> file. */ #ifndef cpu_to_node @@ -52,4 +54,16 @@ ) #endif +#endif /* CONFIG_NUMA */ + +/* returns pointer to cpumask for specified node */ +#ifndef node_to_cpumask_ptr + +#define node_to_cpumask_ptr(v, node) \ + cpumask_t _##v = node_to_cpumask(node), *v = &_##v + +#define node_to_cpumask_ptr_next(v, node) \ + _##v = node_to_cpumask(node) +#endif + #endif /* _ASM_GENERIC_TOPOLOGY_H */ |