[RFC PATCH 3/8] x86: Implement arch_irq_work_has_ipi()

[Frederic Weisbecker]

Most of the time, x86 can trigger self-IPIs. Tell
irq work subsystem about it.

Signed-off-by: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
Cc: Paul Gortmaker <paul.gortmaker@xxxxxxxxxxxxx>
---
 arch/x86/include/asm/irq_work.h |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/arch/x86/include/asm/irq_work.h b/arch/x86/include/asm/irq_work.h
index dad8266..c7489cd 100644
--- a/arch/x86/include/asm/irq_work.h
+++ b/arch/x86/include/asm/irq_work.h
@@ -2,8 +2,12 @@
 #define _ASM_X86_IRQ_WORK_H
 
 #ifdef CONFIG_X86_LOCAL_APIC
+#include <asm/cpufeature.h>
+
 extern void __arch_irq_work_raise(void);
 #define arch_irq_work_raise __arch_irq_work_raise
+
+#define arch_irq_work_has_ipi() (cpu_has_apic)
 #endif
 
 #include <asm-generic/irq_work.h>
-- 
1.7.5.4

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