From 7506ef073061da39646ab43b2fc50c7ac1dd0fb3 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Mon, 18 Jul 2011 13:59:17 +0200 Subject: [PATCH 186/278] softirq-disable-softirq-stacks-for-rt.patch Signed-off-by: Thomas Gleixner --- arch/powerpc/kernel/irq.c | 3 ++- arch/powerpc/kernel/misc_32.S | 2 ++ arch/powerpc/kernel/misc_64.S | 2 ++ arch/sh/kernel/irq.c | 2 ++ arch/sparc/kernel/irq_64.c | 2 ++ arch/x86/kernel/entry_64.S | 2 ++ arch/x86/kernel/irq_32.c | 2 ++ arch/x86/kernel/irq_64.c | 3 ++- include/linux/interrupt.h | 3 +-- 9 files changed, 17 insertions(+), 4 deletions(-) diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c index 745c1e7..e0ee531 100644 --- a/arch/powerpc/kernel/irq.c +++ b/arch/powerpc/kernel/irq.c @@ -440,6 +440,7 @@ void irq_ctx_init(void) } } +#ifndef CONFIG_PREEMPT_RT_FULL static inline void do_softirq_onstack(void) { struct thread_info *curtp, *irqtp; @@ -476,7 +477,7 @@ void do_softirq(void) local_irq_restore(flags); } - +#endif /* * IRQ controller and virtual interrupts diff --git a/arch/powerpc/kernel/misc_32.S b/arch/powerpc/kernel/misc_32.S index 7cd07b4..46c6073 100644 --- a/arch/powerpc/kernel/misc_32.S +++ b/arch/powerpc/kernel/misc_32.S @@ -36,6 +36,7 @@ .text +#ifndef CONFIG_PREEMPT_RT_FULL _GLOBAL(call_do_softirq) mflr r0 stw r0,4(r1) @@ -46,6 +47,7 @@ _GLOBAL(call_do_softirq) lwz r0,4(r1) mtlr r0 blr +#endif _GLOBAL(call_handle_irq) mflr r0 diff --git a/arch/powerpc/kernel/misc_64.S b/arch/powerpc/kernel/misc_64.S index 616921e..2961d75 100644 --- a/arch/powerpc/kernel/misc_64.S +++ b/arch/powerpc/kernel/misc_64.S @@ -29,6 +29,7 @@ .text +#ifndef CONFIG_PREEMPT_RT_FULL _GLOBAL(call_do_softirq) mflr r0 std r0,16(r1) @@ -39,6 +40,7 @@ _GLOBAL(call_do_softirq) ld r0,16(r1) mtlr r0 blr +#endif _GLOBAL(call_handle_irq) ld r8,0(r6) diff --git a/arch/sh/kernel/irq.c b/arch/sh/kernel/irq.c index a3ee919..9127bc0 100644 --- a/arch/sh/kernel/irq.c +++ b/arch/sh/kernel/irq.c @@ -149,6 +149,7 @@ void irq_ctx_exit(int cpu) hardirq_ctx[cpu] = NULL; } +#ifndef CONFIG_PREEMPT_RT_FULL asmlinkage void do_softirq(void) { unsigned long flags; @@ -191,6 +192,7 @@ asmlinkage void do_softirq(void) local_irq_restore(flags); } +#endif #else static inline void handle_one_irq(unsigned int irq) { diff --git a/arch/sparc/kernel/irq_64.c b/arch/sparc/kernel/irq_64.c index d45b710..c3a3737 100644 --- a/arch/sparc/kernel/irq_64.c +++ b/arch/sparc/kernel/irq_64.c @@ -699,6 +699,7 @@ void __irq_entry handler_irq(int pil, struct pt_regs *regs) set_irq_regs(old_regs); } +#ifndef CONFIG_PREEMPT_RT_FULL void do_softirq(void) { unsigned long flags; @@ -724,6 +725,7 @@ void do_softirq(void) local_irq_restore(flags); } +#endif #ifdef CONFIG_HOTPLUG_CPU void fixup_irqs(void) diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S index faf8d5e..fb0f578 100644 --- a/arch/x86/kernel/entry_64.S +++ b/arch/x86/kernel/entry_64.S @@ -1192,6 +1192,7 @@ ENTRY(kernel_execve) CFI_ENDPROC END(kernel_execve) +#ifndef CONFIG_PREEMPT_RT_FULL /* Call softirq on interrupt stack. Interrupts are off. */ ENTRY(call_softirq) CFI_STARTPROC @@ -1211,6 +1212,7 @@ ENTRY(call_softirq) ret CFI_ENDPROC END(call_softirq) +#endif #ifdef CONFIG_XEN zeroentry xen_hypervisor_callback xen_do_hypervisor_callback diff --git a/arch/x86/kernel/irq_32.c b/arch/x86/kernel/irq_32.c index 7209070..84417a2 100644 --- a/arch/x86/kernel/irq_32.c +++ b/arch/x86/kernel/irq_32.c @@ -149,6 +149,7 @@ void __cpuinit irq_ctx_init(int cpu) cpu, per_cpu(hardirq_ctx, cpu), per_cpu(softirq_ctx, cpu)); } +#ifndef CONFIG_PREEMPT_RT_FULL asmlinkage void do_softirq(void) { unsigned long flags; @@ -179,6 +180,7 @@ asmlinkage void do_softirq(void) local_irq_restore(flags); } +#endif bool handle_irq(unsigned irq, struct pt_regs *regs) { diff --git a/arch/x86/kernel/irq_64.c b/arch/x86/kernel/irq_64.c index 69bca46..3fbc07d 100644 --- a/arch/x86/kernel/irq_64.c +++ b/arch/x86/kernel/irq_64.c @@ -65,7 +65,7 @@ bool handle_irq(unsigned irq, struct pt_regs *regs) return true; } - +#ifndef CONFIG_PREEMPT_RT_FULL extern void call_softirq(void); asmlinkage void do_softirq(void) @@ -85,3 +85,4 @@ asmlinkage void do_softirq(void) } local_irq_restore(flags); } +#endif diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h index 20d8dcc..1a74cf7 100644 --- a/include/linux/interrupt.h +++ b/include/linux/interrupt.h @@ -456,10 +456,9 @@ struct softirq_action void (*action)(struct softirq_action *); }; +#ifndef CONFIG_PREEMPT_RT_FULL asmlinkage void do_softirq(void); asmlinkage void __do_softirq(void); - -#ifndef CONFIG_PREEMPT_RT_FULL static inline void thread_do_softirq(void) { do_softirq(); } #else extern void thread_do_softirq(void); -- 1.7.10