Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754849AbaJMCao (ORCPT ); Sun, 12 Oct 2014 22:30:44 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:46211 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754794AbaJMCag (ORCPT ); Sun, 12 Oct 2014 22:30:36 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Peter Zijlstra , Ingo Molnar , "Paul E. McKenney" , Thomas Gleixner , Frederic Weisbecker Subject: [PATCH 3.17 08/25] irq_work: Introduce arch_irq_work_has_interrupt() Date: Mon, 13 Oct 2014 04:25:01 +0200 Message-Id: <20141013022454.636979594@linuxfoundation.org> X-Mailer: git-send-email 2.1.2 In-Reply-To: <20141013022454.289398272@linuxfoundation.org> References: <20141013022454.289398272@linuxfoundation.org> User-Agent: quilt/0.63-1 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.17-stable review patch. If anyone has any objections, please let me know. ------------------ From: Peter Zijlstra commit c5c38ef3d70377dc504a6a3f611a3ec814bc757b upstream. 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 Signed-off-by: Greg Kroah-Hartman --- 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 + include/asm-generic/irq_work.h | 10 ++++++++++ include/linux/irq_work.h | 2 ++ 31 files changed, 42 insertions(+), 1 deletion(-) --- 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 --- 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 --- 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 --- 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 --- 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 --- 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 --- 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 --- 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 --- 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 --- 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 --- 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 --- 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 --- 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 --- 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 --- 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 --- 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 --- 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 --- 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 --- 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 --- 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 --- 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 --- 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 --- 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 --- 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 --- 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 --- 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 --- 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 --- 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 --- 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 --- /dev/null +++ b/include/asm-generic/irq_work.h @@ -0,0 +1,10 @@ +#ifndef __ASM_IRQ_WORK_H +#define __ASM_IRQ_WORK_H + +static inline bool arch_irq_work_has_interrupt(void) +{ + return false; +} + +#endif /* __ASM_IRQ_WORK_H */ + --- a/include/linux/irq_work.h +++ b/include/linux/irq_work.h @@ -42,6 +42,8 @@ void irq_work_run(void); void irq_work_sync(struct irq_work *work); #ifdef CONFIG_IRQ_WORK +#include + bool irq_work_needs_cpu(void); #else static inline bool irq_work_needs_cpu(void) { 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