From c5c38ef3d70377dc504a6a3f611a3ec814bc757b Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Sat, 6 Sep 2014 15:43:02 +0200 Subject: irq_work: Introduce arch_irq_work_has_interrupt() The nohz full code needs irq work to trigger its own interrupt so that the subsystem can work even when the tick is stopped. Lets introduce arch_irq_work_has_interrupt() that archs can override to tell about their support for this ability. Signed-off-by: Peter Zijlstra Cc: Ingo Molnar Cc: Paul E. McKenney Cc: Peter Zijlstra Cc: Thomas Gleixner Signed-off-by: Frederic Weisbecker --- arch/alpha/include/asm/Kbuild | 1 + arch/arc/include/asm/Kbuild | 1 + arch/arm/include/asm/Kbuild | 1 + arch/arm64/include/asm/Kbuild | 3 ++- arch/avr32/include/asm/Kbuild | 1 + arch/blackfin/include/asm/Kbuild | 1 + arch/c6x/include/asm/Kbuild | 1 + arch/cris/include/asm/Kbuild | 1 + arch/frv/include/asm/Kbuild | 1 + arch/hexagon/include/asm/Kbuild | 1 + arch/ia64/include/asm/Kbuild | 1 + arch/m32r/include/asm/Kbuild | 1 + arch/m68k/include/asm/Kbuild | 1 + arch/metag/include/asm/Kbuild | 1 + arch/microblaze/include/asm/Kbuild | 1 + arch/mips/include/asm/Kbuild | 1 + arch/mn10300/include/asm/Kbuild | 1 + arch/openrisc/include/asm/Kbuild | 1 + arch/parisc/include/asm/Kbuild | 1 + arch/powerpc/include/asm/Kbuild | 1 + arch/s390/include/asm/Kbuild | 1 + arch/score/include/asm/Kbuild | 1 + arch/sh/include/asm/Kbuild | 1 + arch/sparc/include/asm/Kbuild | 1 + arch/tile/include/asm/Kbuild | 1 + arch/um/include/asm/Kbuild | 1 + arch/unicore32/include/asm/Kbuild | 1 + arch/x86/include/asm/Kbuild | 1 + arch/xtensa/include/asm/Kbuild | 1 + 29 files changed, 30 insertions(+), 1 deletion(-) (limited to 'arch') diff --git a/arch/alpha/include/asm/Kbuild b/arch/alpha/include/asm/Kbuild index e858aa0ad8af..a52cbf178c3a 100644 --- a/arch/alpha/include/asm/Kbuild +++ b/arch/alpha/include/asm/Kbuild @@ -4,6 +4,7 @@ generic-y += clkdev.h generic-y += cputime.h generic-y += exec.h generic-y += hash.h +generic-y += irq_work.h generic-y += mcs_spinlock.h generic-y += preempt.h generic-y += scatterlist.h diff --git a/arch/arc/include/asm/Kbuild b/arch/arc/include/asm/Kbuild index e76fd79f32b0..b8fffc1a2ac2 100644 --- a/arch/arc/include/asm/Kbuild +++ b/arch/arc/include/asm/Kbuild @@ -18,6 +18,7 @@ generic-y += ioctl.h generic-y += ioctls.h generic-y += ipcbuf.h generic-y += irq_regs.h +generic-y += irq_work.h generic-y += kmap_types.h generic-y += kvm_para.h generic-y += local.h diff --git a/arch/arm/include/asm/Kbuild b/arch/arm/include/asm/Kbuild index 70cd84eb7fda..202905e7ea0c 100644 --- a/arch/arm/include/asm/Kbuild +++ b/arch/arm/include/asm/Kbuild @@ -11,6 +11,7 @@ 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 diff --git a/arch/arm64/include/asm/Kbuild b/arch/arm64/include/asm/Kbuild index 0b3fcf86e6ba..d617789b1ebd 100644 --- a/arch/arm64/include/asm/Kbuild +++ b/arch/arm64/include/asm/Kbuild @@ -9,8 +9,8 @@ generic-y += current.h generic-y += delay.h generic-y += div64.h generic-y += dma.h -generic-y += emergency-restart.h generic-y += early_ioremap.h +generic-y += emergency-restart.h generic-y += errno.h generic-y += ftrace.h generic-y += hash.h @@ -19,6 +19,7 @@ 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/avr32/include/asm/Kbuild b/arch/avr32/include/asm/Kbuild index 00a0f3ccd6eb..2a71b1cb9848 100644 --- a/arch/avr32/include/asm/Kbuild +++ b/arch/avr32/include/asm/Kbuild @@ -9,6 +9,7 @@ generic-y += exec.h generic-y += futex.h generic-y += hash.h generic-y += irq_regs.h +generic-y += irq_work.h generic-y += local.h generic-y += local64.h generic-y += mcs_spinlock.h diff --git a/arch/blackfin/include/asm/Kbuild b/arch/blackfin/include/asm/Kbuild index 0d93b9a79ca9..46ed6bb9c679 100644 --- a/arch/blackfin/include/asm/Kbuild +++ b/arch/blackfin/include/asm/Kbuild @@ -15,6 +15,7 @@ generic-y += hw_irq.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 += kmap_types.h generic-y += kvm_para.h diff --git a/arch/c6x/include/asm/Kbuild b/arch/c6x/include/asm/Kbuild index 8dbdce8421b0..e77e0c1dbe75 100644 --- a/arch/c6x/include/asm/Kbuild +++ b/arch/c6x/include/asm/Kbuild @@ -22,6 +22,7 @@ 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 += local.h diff --git a/arch/cris/include/asm/Kbuild b/arch/cris/include/asm/Kbuild index 31742dfadff9..802b94c4ca86 100644 --- a/arch/cris/include/asm/Kbuild +++ b/arch/cris/include/asm/Kbuild @@ -8,6 +8,7 @@ generic-y += clkdev.h generic-y += cputime.h generic-y += exec.h generic-y += hash.h +generic-y += irq_work.h generic-y += kvm_para.h generic-y += linkage.h generic-y += mcs_spinlock.h diff --git a/arch/frv/include/asm/Kbuild b/arch/frv/include/asm/Kbuild index 5b73921b6e9d..3caf05cabfc5 100644 --- a/arch/frv/include/asm/Kbuild +++ b/arch/frv/include/asm/Kbuild @@ -3,6 +3,7 @@ generic-y += clkdev.h generic-y += cputime.h generic-y += exec.h generic-y += hash.h +generic-y += irq_work.h generic-y += mcs_spinlock.h generic-y += preempt.h generic-y += scatterlist.h diff --git a/arch/hexagon/include/asm/Kbuild b/arch/hexagon/include/asm/Kbuild index 0e69796b58c7..5f234a5a2320 100644 --- a/arch/hexagon/include/asm/Kbuild +++ b/arch/hexagon/include/asm/Kbuild @@ -23,6 +23,7 @@ generic-y += ioctls.h generic-y += iomap.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 += local.h diff --git a/arch/ia64/include/asm/Kbuild b/arch/ia64/include/asm/Kbuild index e8317d2d6c8d..747320be9d0e 100644 --- a/arch/ia64/include/asm/Kbuild +++ b/arch/ia64/include/asm/Kbuild @@ -2,6 +2,7 @@ generic-y += clkdev.h generic-y += exec.h generic-y += hash.h +generic-y += irq_work.h generic-y += kvm_para.h generic-y += mcs_spinlock.h generic-y += preempt.h diff --git a/arch/m32r/include/asm/Kbuild b/arch/m32r/include/asm/Kbuild index accc10a3dc78..e02448b0648b 100644 --- a/arch/m32r/include/asm/Kbuild +++ b/arch/m32r/include/asm/Kbuild @@ -3,6 +3,7 @@ generic-y += clkdev.h generic-y += cputime.h generic-y += exec.h generic-y += hash.h +generic-y += irq_work.h generic-y += mcs_spinlock.h generic-y += module.h generic-y += preempt.h diff --git a/arch/m68k/include/asm/Kbuild b/arch/m68k/include/asm/Kbuild index c67c94a2d672..dbaf9f3065e8 100644 --- a/arch/m68k/include/asm/Kbuild +++ b/arch/m68k/include/asm/Kbuild @@ -11,6 +11,7 @@ generic-y += hw_irq.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 += kmap_types.h generic-y += kvm_para.h diff --git a/arch/metag/include/asm/Kbuild b/arch/metag/include/asm/Kbuild index c29ead89a317..7b8111c8f937 100644 --- a/arch/metag/include/asm/Kbuild +++ b/arch/metag/include/asm/Kbuild @@ -19,6 +19,7 @@ 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/microblaze/include/asm/Kbuild b/arch/microblaze/include/asm/Kbuild index 27a3acda6c19..448143b8cabd 100644 --- a/arch/microblaze/include/asm/Kbuild +++ b/arch/microblaze/include/asm/Kbuild @@ -5,6 +5,7 @@ generic-y += cputime.h generic-y += device.h generic-y += exec.h generic-y += hash.h +generic-y += irq_work.h generic-y += mcs_spinlock.h generic-y += preempt.h generic-y += scatterlist.h diff --git a/arch/mips/include/asm/Kbuild b/arch/mips/include/asm/Kbuild index 335e5290ec75..57012ef1f51e 100644 --- a/arch/mips/include/asm/Kbuild +++ b/arch/mips/include/asm/Kbuild @@ -3,6 +3,7 @@ generic-y += cputime.h generic-y += current.h generic-y += emergency-restart.h generic-y += hash.h +generic-y += irq_work.h generic-y += local64.h generic-y += mcs_spinlock.h generic-y += mutex.h diff --git a/arch/mn10300/include/asm/Kbuild b/arch/mn10300/include/asm/Kbuild index ecbd6676bd33..77eb1a68d13b 100644 --- a/arch/mn10300/include/asm/Kbuild +++ b/arch/mn10300/include/asm/Kbuild @@ -4,6 +4,7 @@ generic-y += clkdev.h generic-y += cputime.h generic-y += exec.h generic-y += hash.h +generic-y += irq_work.h generic-y += mcs_spinlock.h generic-y += preempt.h generic-y += scatterlist.h diff --git a/arch/openrisc/include/asm/Kbuild b/arch/openrisc/include/asm/Kbuild index 480af0d9c2f5..89b61d7dc790 100644 --- a/arch/openrisc/include/asm/Kbuild +++ b/arch/openrisc/include/asm/Kbuild @@ -31,6 +31,7 @@ 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/parisc/include/asm/Kbuild b/arch/parisc/include/asm/Kbuild index ecf25e6678ad..ffb024b8423f 100644 --- a/arch/parisc/include/asm/Kbuild +++ b/arch/parisc/include/asm/Kbuild @@ -10,6 +10,7 @@ generic-y += exec.h generic-y += hash.h generic-y += hw_irq.h generic-y += irq_regs.h +generic-y += irq_work.h generic-y += kdebug.h generic-y += kvm_para.h generic-y += local.h diff --git a/arch/powerpc/include/asm/Kbuild b/arch/powerpc/include/asm/Kbuild index 7f23f162ce9c..31e8f59aff38 100644 --- a/arch/powerpc/include/asm/Kbuild +++ b/arch/powerpc/include/asm/Kbuild @@ -1,6 +1,7 @@ generic-y += clkdev.h generic-y += hash.h +generic-y += irq_work.h generic-y += mcs_spinlock.h generic-y += preempt.h generic-y += rwsem.h diff --git a/arch/s390/include/asm/Kbuild b/arch/s390/include/asm/Kbuild index b3fea0722ff1..773f86676588 100644 --- a/arch/s390/include/asm/Kbuild +++ b/arch/s390/include/asm/Kbuild @@ -2,6 +2,7 @@ generic-y += clkdev.h generic-y += hash.h +generic-y += irq_work.h generic-y += mcs_spinlock.h generic-y += preempt.h generic-y += scatterlist.h diff --git a/arch/score/include/asm/Kbuild b/arch/score/include/asm/Kbuild index aad209199f7e..1909d2a5b82f 100644 --- a/arch/score/include/asm/Kbuild +++ b/arch/score/include/asm/Kbuild @@ -6,6 +6,7 @@ generic-y += barrier.h generic-y += clkdev.h generic-y += cputime.h generic-y += hash.h +generic-y += irq_work.h generic-y += mcs_spinlock.h generic-y += preempt.h generic-y += scatterlist.h diff --git a/arch/sh/include/asm/Kbuild b/arch/sh/include/asm/Kbuild index c19e47dacb31..5a6c9acff0d2 100644 --- a/arch/sh/include/asm/Kbuild +++ b/arch/sh/include/asm/Kbuild @@ -12,6 +12,7 @@ generic-y += hash.h generic-y += ioctl.h generic-y += ipcbuf.h generic-y += irq_regs.h +generic-y += irq_work.h generic-y += kvm_para.h generic-y += local.h generic-y += local64.h diff --git a/arch/sparc/include/asm/Kbuild b/arch/sparc/include/asm/Kbuild index cdd1b447bb6c..f5f94ce1692c 100644 --- a/arch/sparc/include/asm/Kbuild +++ b/arch/sparc/include/asm/Kbuild @@ -8,6 +8,7 @@ generic-y += emergency-restart.h generic-y += exec.h generic-y += hash.h generic-y += irq_regs.h +generic-y += irq_work.h generic-y += linkage.h generic-y += local.h generic-y += local64.h diff --git a/arch/tile/include/asm/Kbuild b/arch/tile/include/asm/Kbuild index 0aa5675e7025..e6462b8a6284 100644 --- a/arch/tile/include/asm/Kbuild +++ b/arch/tile/include/asm/Kbuild @@ -17,6 +17,7 @@ generic-y += ioctl.h generic-y += ioctls.h generic-y += ipcbuf.h generic-y += irq_regs.h +generic-y += irq_work.h generic-y += local.h generic-y += local64.h generic-y += mcs_spinlock.h diff --git a/arch/um/include/asm/Kbuild b/arch/um/include/asm/Kbuild index 7bd64aa2e94a..244b12c8cb39 100644 --- a/arch/um/include/asm/Kbuild +++ b/arch/um/include/asm/Kbuild @@ -14,6 +14,7 @@ generic-y += hash.h generic-y += hw_irq.h generic-y += io.h generic-y += irq_regs.h +generic-y += irq_work.h generic-y += kdebug.h generic-y += mcs_spinlock.h generic-y += mutex.h diff --git a/arch/unicore32/include/asm/Kbuild b/arch/unicore32/include/asm/Kbuild index 1e5fb872a4aa..5a2bb53faa42 100644 --- a/arch/unicore32/include/asm/Kbuild +++ b/arch/unicore32/include/asm/Kbuild @@ -22,6 +22,7 @@ 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 += local.h diff --git a/arch/x86/include/asm/Kbuild b/arch/x86/include/asm/Kbuild index 3bf000fab0ae..8fa909cc6553 100644 --- a/arch/x86/include/asm/Kbuild +++ b/arch/x86/include/asm/Kbuild @@ -7,5 +7,6 @@ genhdr-y += unistd_x32.h generic-y += clkdev.h generic-y += cputime.h generic-y += early_ioremap.h +generic-y += irq_work.h generic-y += mcs_spinlock.h generic-y += scatterlist.h diff --git a/arch/xtensa/include/asm/Kbuild b/arch/xtensa/include/asm/Kbuild index c3d20ba6eb86..105d38922c44 100644 --- a/arch/xtensa/include/asm/Kbuild +++ b/arch/xtensa/include/asm/Kbuild @@ -12,6 +12,7 @@ generic-y += hardirq.h generic-y += hash.h generic-y += ioctl.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 -- cgit v1.2.3 From 3010279f0fc36f0388872203e63ca49912f648fd Mon Sep 17 00:00:00 2001 From: Frederic Weisbecker Date: Sat, 16 Aug 2014 18:47:15 +0200 Subject: x86: Tell irq work about self IPI support x86 supports irq work self-IPIs when local apic is available. This is partly known on runtime so lets implement arch_irq_work_has_interrupt() accordingly. This should be safely called after setup_arch(). Acked-by: Peter Zijlstra (Intel) Cc: Ingo Molnar Cc: Paul E. McKenney Cc: Peter Zijlstra Cc: Thomas Gleixner Signed-off-by: Frederic Weisbecker --- arch/x86/include/asm/Kbuild | 1 - arch/x86/include/asm/irq_work.h | 11 +++++++++++ arch/x86/kernel/irq_work.c | 2 +- 3 files changed, 12 insertions(+), 2 deletions(-) create mode 100644 arch/x86/include/asm/irq_work.h (limited to 'arch') diff --git a/arch/x86/include/asm/Kbuild b/arch/x86/include/asm/Kbuild index 8fa909cc6553..3bf000fab0ae 100644 --- a/arch/x86/include/asm/Kbuild +++ b/arch/x86/include/asm/Kbuild @@ -7,6 +7,5 @@ genhdr-y += unistd_x32.h generic-y += clkdev.h generic-y += cputime.h generic-y += early_ioremap.h -generic-y += irq_work.h generic-y += mcs_spinlock.h generic-y += scatterlist.h diff --git a/arch/x86/include/asm/irq_work.h b/arch/x86/include/asm/irq_work.h new file mode 100644 index 000000000000..78162f8e248b --- /dev/null +++ b/arch/x86/include/asm/irq_work.h @@ -0,0 +1,11 @@ +#ifndef _ASM_IRQ_WORK_H +#define _ASM_IRQ_WORK_H + +#include + +static inline bool arch_irq_work_has_interrupt(void) +{ + return cpu_has_apic; +} + +#endif /* _ASM_IRQ_WORK_H */ diff --git a/arch/x86/kernel/irq_work.c b/arch/x86/kernel/irq_work.c index 1de84e3ab4e0..15d741ddfeeb 100644 --- a/arch/x86/kernel/irq_work.c +++ b/arch/x86/kernel/irq_work.c @@ -41,7 +41,7 @@ __visible void smp_trace_irq_work_interrupt(struct pt_regs *regs) void arch_irq_work_raise(void) { #ifdef CONFIG_X86_LOCAL_APIC - if (!cpu_has_apic) + if (!arch_irq_work_has_interrupt()) return; apic->send_IPI_self(IRQ_WORK_VECTOR); -- cgit v1.2.3 From 09f6edd424218eb69078551b2ecfada1f2d098eb Mon Sep 17 00:00:00 2001 From: Frederic Weisbecker Date: Sat, 16 Aug 2014 18:47:53 +0200 Subject: arm: Tell irq work about self IPI support 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) Cc: Ingo Molnar Cc: Paul E. McKenney Cc: Peter Zijlstra Cc: Russell King Cc: Thomas Gleixner Signed-off-by: Frederic Weisbecker --- 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(-) create mode 100644 arch/arm/include/asm/irq_work.h (limited to 'arch') diff --git a/arch/arm/include/asm/Kbuild b/arch/arm/include/asm/Kbuild index 202905e7ea0c..70cd84eb7fda 100644 --- 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 diff --git a/arch/arm/include/asm/irq_work.h b/arch/arm/include/asm/irq_work.h new file mode 100644 index 000000000000..712d03e5973a --- /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 + +static inline bool arch_irq_work_has_interrupt(void) +{ + return is_smp(); +} + +#endif /* _ASM_ARM_IRQ_WORK_H */ diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c index 9388a3d479e1..bbe22fcb78f6 100644 --- a/arch/arm/kernel/smp.c +++ b/arch/arm/kernel/smp.c @@ -503,7 +503,7 @@ void arch_send_call_function_single_ipi(int cpu) #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 -- cgit v1.2.3 From 3631073659d0aafeaa52227bb61a100efaf901dc Mon Sep 17 00:00:00 2001 From: Frederic Weisbecker Date: Sat, 16 Aug 2014 18:48:05 +0200 Subject: arm64: Tell irq work about self IPI support 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) Acked-by: Catalin Marinas Cc: Ingo Molnar Cc: Paul E. McKenney Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: Will Deacon Signed-off-by: Frederic Weisbecker --- arch/arm64/include/asm/Kbuild | 1 - arch/arm64/include/asm/irq_work.h | 11 +++++++++++ arch/arm64/include/asm/smp.h | 2 ++ arch/arm64/kernel/smp.c | 2 +- 4 files changed, 14 insertions(+), 2 deletions(-) create mode 100644 arch/arm64/include/asm/irq_work.h (limited to 'arch') 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 + +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)) { -- cgit v1.2.3