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

Frederic Weisbecker
2012-10-20T16:23:03Z

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

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
---
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