diff options
| author |   Mike Travis <travis@sgi.com> | 2008-04-04 18:11:01 -0700 |
|---|---|---|
| committer |   Ingo Molnar <mingo@elte.hu> | 2008-04-19 19:44:59 +0200 |
| commit | 9f0e8d0400d925c3acd5f4e01dbeb736e4011882 (patch) | |
| tree | 970dab54eeba019e4649aa32730489206be5f8a2 /include/linux/cpumask.h | |
| parent | cpumask: add CPU_MASK_ALL_PTR macro (diff) | |
| download | linux-dev-9f0e8d0400d925c3acd5f4e01dbeb736e4011882.tar.xz linux-dev-9f0e8d0400d925c3acd5f4e01dbeb736e4011882.zip | |
x86: convert cpumask_of_cpu macro to allocated array
* Here is a simple patch to use an allocated array of cpumasks to
represent cpumask_of_cpu() instead of constructing one on the stack.
It's based on the Kconfig option "HAVE_CPUMASK_OF_CPU_MAP" which is
currently only set for x86_64 SMP. Otherwise the the existing
cpumask_of_cpu() is used but has been changed to produce an lvalue
so a pointer to it can be used.
Cc: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Mike Travis <travis@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux/cpumask.h')
| -rw-r--r-- | include/linux/cpumask.h | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/include/linux/cpumask.h b/include/linux/cpumask.h index 629102feaa66..259c8051155d 100644 --- a/include/linux/cpumask.h +++ b/include/linux/cpumask.h @@ -222,8 +222,13 @@ int __next_cpu(int n, const cpumask_t *srcp); #define next_cpu(n, src) ({ (void)(src); 1; }) #endif +#ifdef CONFIG_HAVE_CPUMASK_OF_CPU_MAP +extern cpumask_t *cpumask_of_cpu_map; +#define cpumask_of_cpu(cpu) (cpumask_of_cpu_map[cpu]) + +#else #define cpumask_of_cpu(cpu) \ -({ \ +(*({ \ typeof(_unused_cpumask_arg_) m; \ if (sizeof(m) == sizeof(unsigned long)) { \ m.bits[0] = 1UL<<(cpu); \ @@ -231,8 +236,9 @@ int __next_cpu(int n, const cpumask_t *srcp); cpus_clear(m); \ cpu_set((cpu), m); \ } \ - m; \ -}) + &m; \ +})) +#endif #define CPU_MASK_LAST_WORD BITMAP_LAST_WORD_MASK(NR_CPUS) |