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authorMike Travis <travis@sgi.com>2008-12-16 17:33:52 -0800
committerMike Travis <travis@sgi.com>2008-12-16 17:40:56 -0800
commite7986739a76cde5079da08809d8bbc6878387ae0 (patch)
treedd99ed6af66d459fe164f75ded7f95262dc0fb0d /arch/x86/include/asm/ipi.h
parent36f5101a60de8f79c0d1ca06e50660bf5129e02c (diff)
x86 smp: modify send_IPI_mask interface to accept cpumask_t pointers
Impact: cleanup, change parameter passing * Change genapic interfaces to accept cpumask_t pointers where possible. * Modify external callers to use cpumask_t pointers in function calls. * Create new send_IPI_mask_allbutself which is the same as the send_IPI_mask functions but removes smp_processor_id() from list. This removes another common need for a temporary cpumask_t variable. * Functions that used a temp cpumask_t variable for: cpumask_t allbutme = cpu_online_map; cpu_clear(smp_processor_id(), allbutme); if (!cpus_empty(allbutme)) ... become: if (!cpus_equal(cpu_online_map, cpumask_of_cpu(cpu))) ... * Other minor code optimizations (like using cpus_clear instead of CPU_MASK_NONE, etc.) Applies to linux-2.6.tip/master. Signed-off-by: Mike Travis <travis@sgi.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Acked-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/include/asm/ipi.h')
-rw-r--r--arch/x86/include/asm/ipi.h21
1 files changed, 19 insertions, 2 deletions
diff --git a/arch/x86/include/asm/ipi.h b/arch/x86/include/asm/ipi.h
index f89dffb28aa9..24b6e613edfa 100644
--- a/arch/x86/include/asm/ipi.h
+++ b/arch/x86/include/asm/ipi.h
@@ -117,7 +117,7 @@ static inline void __send_IPI_dest_field(unsigned int mask, int vector,
native_apic_mem_write(APIC_ICR, cfg);
}
-static inline void send_IPI_mask_sequence(cpumask_t mask, int vector)
+static inline void send_IPI_mask_sequence(const cpumask_t *mask, int vector)
{
unsigned long flags;
unsigned long query_cpu;
@@ -128,11 +128,28 @@ static inline void send_IPI_mask_sequence(cpumask_t mask, int vector)
* - mbligh
*/
local_irq_save(flags);
- for_each_cpu_mask_nr(query_cpu, mask) {
+ for_each_cpu_mask_nr(query_cpu, *mask) {
__send_IPI_dest_field(per_cpu(x86_cpu_to_apicid, query_cpu),
vector, APIC_DEST_PHYSICAL);
}
local_irq_restore(flags);
}
+static inline void send_IPI_mask_allbutself(const cpumask_t *mask, int vector)
+{
+ unsigned long flags;
+ unsigned int query_cpu;
+ unsigned int this_cpu = smp_processor_id();
+
+ /* See Hack comment above */
+
+ local_irq_save(flags);
+ for_each_cpu_mask_nr(query_cpu, *mask)
+ if (query_cpu != this_cpu)
+ __send_IPI_dest_field(
+ per_cpu(x86_cpu_to_apicid, query_cpu),
+ vector, APIC_DEST_PHYSICAL);
+ local_irq_restore(flags);
+}
+
#endif /* _ASM_X86_IPI_H */