This is a note to let you know that I've just added the patch titled
arm: Tell irq work about self IPI support
to the 3.17-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
arm-tell-irq-work-about-self-ipi-support.patch
and it can be found in the queue-3.17 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 09f6edd424218eb69078551b2ecfada1f2d098eb Mon Sep 17 00:00:00 2001
From: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Date: Sat, 16 Aug 2014 18:47:53 +0200
Subject: arm: Tell irq work about self IPI support
From: Frederic Weisbecker <fweisbec@xxxxxxxxx>
commit 09f6edd424218eb69078551b2ecfada1f2d098eb upstream.
ARM irq work IPI support depends on SMP support. That information is
partly known at early boottime. Lets implement
arch_irq_work_has_interrupt() accordingly.
Acked-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Russell King <linux@xxxxxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/arm/include/asm/Kbuild | 1 -
arch/arm/include/asm/irq_work.h | 11 +++++++++++
arch/arm/kernel/smp.c | 2 +-
3 files changed, 12 insertions(+), 2 deletions(-)
--- a/arch/arm/include/asm/Kbuild
+++ b/arch/arm/include/asm/Kbuild
@@ -11,7 +11,6 @@ generic-y += hash.h
generic-y += ioctl.h
generic-y += ipcbuf.h
generic-y += irq_regs.h
-generic-y += irq_work.h
generic-y += kdebug.h
generic-y += local.h
generic-y += local64.h
--- /dev/null
+++ b/arch/arm/include/asm/irq_work.h
@@ -0,0 +1,11 @@
+#ifndef __ASM_ARM_IRQ_WORK_H
+#define __ASM_ARM_IRQ_WORK_H
+
+#include <asm/smp_plat.h>
+
+static inline bool arch_irq_work_has_interrupt(void)
+{
+ return is_smp();
+}
+
+#endif /* _ASM_ARM_IRQ_WORK_H */
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -503,7 +503,7 @@ void arch_send_call_function_single_ipi(
#ifdef CONFIG_IRQ_WORK
void arch_irq_work_raise(void)
{
- if (is_smp())
+ if (arch_irq_work_has_interrupt())
smp_cross_call(cpumask_of(smp_processor_id()), IPI_IRQ_WORK);
}
#endif
Patches currently in stable-queue which might be from fweisbec@xxxxxxxxx are
queue-3.17/irq_work-force-raised-irq-work-to-run-on-irq-work-interrupt.patch
queue-3.17/arm-tell-irq-work-about-self-ipi-support.patch
queue-3.17/irq_work-introduce-arch_irq_work_has_interrupt.patch
queue-3.17/x86-tell-irq-work-about-self-ipi-support.patch
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