diff options
| author | Mike Travis <travis@sgi.com> | 2009-01-04 05:18:03 -0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-01-04 15:39:26 +0100 |
| commit | c2d1cec1c77f7714672c1efeae075424c929e0d5 (patch) | |
| tree | 94afecf37405b93b6807377e4e99cc2ac9323034 /arch/x86/kernel/smp.c | |
| parent | 588235bb53f2c215f0d4b08fd30b461fedc3338e (diff) | |
| download | linux-c2d1cec1c77f7714672c1efeae075424c929e0d5.tar.bz2 | |
x86: cleanup remaining cpumask_t ops in smpboot code
Impact: use new cpumask API to reduce memory and stack usage
Allocate the following local cpumasks based on the number of cpus that
are present. References will use new cpumask API. (Currently only
modified for x86_64, x86_32 continues to use the *_map variants.)
cpu_callin_mask
cpu_callout_mask
cpu_initialized_mask
cpu_sibling_setup_mask
Provide the following accessor functions:
struct cpumask *cpu_sibling_mask(int cpu)
struct cpumask *cpu_core_mask(int cpu)
Other changes are when setting or clearing the cpu online, possible
or present maps, use the accessor functions.
Signed-off-by: Mike Travis <travis@sgi.com>
Acked-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/smp.c')
| -rw-r--r-- | arch/x86/kernel/smp.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/arch/x86/kernel/smp.c b/arch/x86/kernel/smp.c index beea2649a240..182135ba1eaf 100644 --- a/arch/x86/kernel/smp.c +++ b/arch/x86/kernel/smp.c @@ -128,16 +128,23 @@ void native_send_call_func_single_ipi(int cpu) void native_send_call_func_ipi(const struct cpumask *mask) { - cpumask_t allbutself; + cpumask_var_t allbutself; - allbutself = cpu_online_map; - cpu_clear(smp_processor_id(), allbutself); + if (!alloc_cpumask_var(&allbutself, GFP_ATOMIC)) { + send_IPI_mask(mask, CALL_FUNCTION_VECTOR); + return; + } - if (cpus_equal(*mask, allbutself) && - cpus_equal(cpu_online_map, cpu_callout_map)) + cpumask_copy(allbutself, cpu_online_mask); + cpumask_clear_cpu(smp_processor_id(), allbutself); + + if (cpumask_equal(mask, allbutself) && + cpumask_equal(cpu_online_mask, cpu_callout_mask)) send_IPI_allbutself(CALL_FUNCTION_VECTOR); else send_IPI_mask(mask, CALL_FUNCTION_VECTOR); + + free_cpumask_var(allbutself); } /* |