Messages in this thread Patch in this message | | | Date | Fri, 20 Feb 2015 11:08:38 -0600 | From | Paul Clarke <> | Subject | [PATCH v2] powerpc: re-enable dynticks |
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implement arch_irq_work_has_interrupt() for powerpc
Commit 9b01f5bf3 introduced a dependency on "IRQ work self-IPIs" for full dynamic ticks to be enabled, by expecting architectures to implement a suitable arch_irq_work_has_interrupt() routine.
Several arches have implemented this routine, including x86 (3010279f) and arm (09f6edd4), but powerpc was omitted.
This patch implements this routine for powerpc.
The symptom, at boot (on powerpc arch systems) with "nohz_full=<CPU list>" is displayed: NO_HZ: Can't run full dynticks because arch doesn't support irq work self-IPIs
after this patch: NO_HZ: Full dynticks CPUs: <CPU list>.
Tested against 3.19.
v2: changed "return 1" to "return true", per Michael Ellerman
CC: Frederic Weisbecker <fweisbec@gmail.com> CC: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by: Paul A. Clarke <pc@us.ibm.com>
diff --git a/arch/powerpc/include/asm/irq_work.h b/arch/powerpc/include/asm/irq_work.h new file mode 100644 index 0000000..99cc0aa --- /dev/null +++ b/arch/powerpc/include/asm/irq_work.h @@ -0,0 +1,11 @@ +#ifndef _ASM_IRQ_WORK_H +#define _ASM_IRQ_WORK_H + +#include <asm/processor.h> + +static inline bool arch_irq_work_has_interrupt(void) +{ + return true; +} + +#endif /* _ASM_IRQ_WORK_H */
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