Messages in this thread Patch in this message | | | From | Frederic Weisbecker <> | Subject | [RFC PATCH 5/9] x86: Tell irq work about self IPI support | Date | Thu, 21 Aug 2014 16:52:53 +0200 |
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x86 supports irq work when local apic is available. This is partly known on runtime so lets implement arch_irq_work_has_own_interrupt() accordingly.
This should be safely called after setup_arch().
Cc: Catalin Iacob <iacobcatalin@gmail.com> Cc: Dave Jones <davej@redhat.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> --- arch/x86/kernel/irq_work.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/arch/x86/kernel/irq_work.c b/arch/x86/kernel/irq_work.c index 54f60a2..b5f8fff 100644 --- a/arch/x86/kernel/irq_work.c +++ b/arch/x86/kernel/irq_work.c @@ -38,6 +38,11 @@ __visible void smp_trace_irq_work_interrupt(struct pt_regs *regs) exiting_irq(); } +int __init arch_irq_work_has_own_interrupt(void) +{ + return cpu_has_apic; +} + void arch_irq_work_raise(void) { if (!cpu_has_apic) -- 1.8.3.1
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