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authorFrederic Weisbecker <fweisbec@gmail.com>2014-08-16 18:48:05 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-10-15 12:29:25 +0200
commitfd979860f7e04a9028f803b1a79099e05a60f579 (patch)
treec14ca929ac35ebb65114a19bb7f70170918d568c
parent1063368632f52a61ceb20565501606a090335878 (diff)
downloadlinux-fd979860f7e04a9028f803b1a79099e05a60f579.tar.gz
arm64: Tell irq work about self IPI support
commit 3631073659d0aafeaa52227bb61a100efaf901dc upstream. ARM64 irq work self-IPI support depends on __smp_cross_call to point to some relevant IRQ controller operations. This information should be available after the call to init_IRQ(). Lets implement arch_irq_work_has_interrupt() accordingly. Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Catalin Marinas <catalin.marinas@arm.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> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--arch/arm64/include/asm/Kbuild1
-rw-r--r--arch/arm64/include/asm/irq_work.h11
-rw-r--r--arch/arm64/include/asm/smp.h2
-rw-r--r--arch/arm64/kernel/smp.c2
4 files changed, 14 insertions, 2 deletions
diff --git a/arch/arm64/include/asm/Kbuild b/arch/arm64/include/asm/Kbuild
index d617789b1ebd..c1968475cc4e 100644
--- a/arch/arm64/include/asm/Kbuild
+++ b/arch/arm64/include/asm/Kbuild
@@ -19,7 +19,6 @@ generic-y += ioctl.h
generic-y += ioctls.h
generic-y += ipcbuf.h
generic-y += irq_regs.h
-generic-y += irq_work.h
generic-y += kdebug.h
generic-y += kmap_types.h
generic-y += kvm_para.h
diff --git a/arch/arm64/include/asm/irq_work.h b/arch/arm64/include/asm/irq_work.h
new file mode 100644
index 000000000000..8e24ef3f7c82
--- /dev/null
+++ b/arch/arm64/include/asm/irq_work.h
@@ -0,0 +1,11 @@
+#ifndef __ASM_IRQ_WORK_H
+#define __ASM_IRQ_WORK_H
+
+#include <asm/smp.h>
+
+static inline bool arch_irq_work_has_interrupt(void)
+{
+ return !!__smp_cross_call;
+}
+
+#endif /* __ASM_IRQ_WORK_H */
diff --git a/arch/arm64/include/asm/smp.h b/arch/arm64/include/asm/smp.h
index a498f2cd2c2a..780f82c827b6 100644
--- a/arch/arm64/include/asm/smp.h
+++ b/arch/arm64/include/asm/smp.h
@@ -48,6 +48,8 @@ extern void smp_init_cpus(void);
*/
extern void set_smp_cross_call(void (*)(const struct cpumask *, unsigned int));
+extern void (*__smp_cross_call)(const struct cpumask *, unsigned int);
+
/*
* Called from the secondary holding pen, this is the secondary CPU entry point.
*/
diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c
index 474339718105..b06d1d90ee8c 100644
--- a/arch/arm64/kernel/smp.c
+++ b/arch/arm64/kernel/smp.c
@@ -470,7 +470,7 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
}
}
-static void (*__smp_cross_call)(const struct cpumask *, unsigned int);
+void (*__smp_cross_call)(const struct cpumask *, unsigned int);
void __init set_smp_cross_call(void (*fn)(const struct cpumask *, unsigned int))
{