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    Subject[RFC PATCH 5/9] x86: Implement arch_irq_work_has_ipi()
    Date
    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


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