193 lines
5.0 KiB
Diff
193 lines
5.0 KiB
Diff
Subject: softirq-disable-softirq-stacks-for-rt.patch
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From: Thomas Gleixner <tglx@linutronix.de>
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Date: Mon, 18 Jul 2011 13:59:17 +0200
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Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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---
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arch/powerpc/kernel/irq.c | 3 ++-
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arch/powerpc/kernel/misc_32.S | 2 ++
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arch/powerpc/kernel/misc_64.S | 2 ++
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arch/sh/kernel/irq.c | 2 ++
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arch/sparc/kernel/irq_64.c | 2 ++
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arch/x86/kernel/entry_64.S | 2 ++
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arch/x86/kernel/irq_32.c | 2 ++
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arch/x86/kernel/irq_64.c | 3 ++-
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include/linux/interrupt.h | 3 +--
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9 files changed, 17 insertions(+), 4 deletions(-)
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Index: linux-3.2/arch/powerpc/kernel/irq.c
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===================================================================
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--- linux-3.2.orig/arch/powerpc/kernel/irq.c
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+++ linux-3.2/arch/powerpc/kernel/irq.c
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@@ -440,6 +440,7 @@ void irq_ctx_init(void)
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}
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}
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+#ifndef CONFIG_PREEMPT_RT_FULL
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static inline void do_softirq_onstack(void)
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{
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struct thread_info *curtp, *irqtp;
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@@ -476,7 +477,7 @@ void do_softirq(void)
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local_irq_restore(flags);
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}
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-
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+#endif
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/*
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* IRQ controller and virtual interrupts
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Index: linux-3.2/arch/powerpc/kernel/misc_32.S
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===================================================================
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--- linux-3.2.orig/arch/powerpc/kernel/misc_32.S
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+++ linux-3.2/arch/powerpc/kernel/misc_32.S
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@@ -36,6 +36,7 @@
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.text
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+#ifndef CONFIG_PREEMPT_RT_FULL
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_GLOBAL(call_do_softirq)
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mflr r0
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stw r0,4(r1)
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@@ -46,6 +47,7 @@ _GLOBAL(call_do_softirq)
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lwz r0,4(r1)
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mtlr r0
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blr
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+#endif
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_GLOBAL(call_handle_irq)
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mflr r0
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Index: linux-3.2/arch/powerpc/kernel/misc_64.S
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===================================================================
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--- linux-3.2.orig/arch/powerpc/kernel/misc_64.S
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+++ linux-3.2/arch/powerpc/kernel/misc_64.S
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@@ -29,6 +29,7 @@
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.text
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+#ifndef CONFIG_PREEMPT_RT_FULL
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_GLOBAL(call_do_softirq)
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mflr r0
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std r0,16(r1)
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@@ -39,6 +40,7 @@ _GLOBAL(call_do_softirq)
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ld r0,16(r1)
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mtlr r0
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blr
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+#endif
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_GLOBAL(call_handle_irq)
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ld r8,0(r6)
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Index: linux-3.2/arch/sh/kernel/irq.c
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===================================================================
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--- linux-3.2.orig/arch/sh/kernel/irq.c
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+++ linux-3.2/arch/sh/kernel/irq.c
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@@ -149,6 +149,7 @@ void irq_ctx_exit(int cpu)
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hardirq_ctx[cpu] = NULL;
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}
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+#ifndef CONFIG_PREEMPT_RT_FULL
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asmlinkage void do_softirq(void)
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{
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unsigned long flags;
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@@ -191,6 +192,7 @@ asmlinkage void do_softirq(void)
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local_irq_restore(flags);
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}
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+#endif
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#else
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static inline void handle_one_irq(unsigned int irq)
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{
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Index: linux-3.2/arch/sparc/kernel/irq_64.c
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===================================================================
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--- linux-3.2.orig/arch/sparc/kernel/irq_64.c
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+++ linux-3.2/arch/sparc/kernel/irq_64.c
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@@ -699,6 +699,7 @@ void __irq_entry handler_irq(int pil, st
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set_irq_regs(old_regs);
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}
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+#ifndef CONFIG_PREEMPT_RT_FULL
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void do_softirq(void)
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{
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unsigned long flags;
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@@ -724,6 +725,7 @@ void do_softirq(void)
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local_irq_restore(flags);
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}
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+#endif
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#ifdef CONFIG_HOTPLUG_CPU
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void fixup_irqs(void)
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Index: linux-3.2/arch/x86/kernel/entry_64.S
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===================================================================
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--- linux-3.2.orig/arch/x86/kernel/entry_64.S
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+++ linux-3.2/arch/x86/kernel/entry_64.S
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@@ -1192,6 +1192,7 @@ ENTRY(kernel_execve)
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CFI_ENDPROC
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END(kernel_execve)
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+#ifndef CONFIG_PREEMPT_RT_FULL
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/* Call softirq on interrupt stack. Interrupts are off. */
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ENTRY(call_softirq)
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CFI_STARTPROC
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@@ -1211,6 +1212,7 @@ ENTRY(call_softirq)
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ret
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CFI_ENDPROC
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END(call_softirq)
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+#endif
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#ifdef CONFIG_XEN
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zeroentry xen_hypervisor_callback xen_do_hypervisor_callback
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Index: linux-3.2/arch/x86/kernel/irq_32.c
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===================================================================
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--- linux-3.2.orig/arch/x86/kernel/irq_32.c
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+++ linux-3.2/arch/x86/kernel/irq_32.c
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@@ -149,6 +149,7 @@ void __cpuinit irq_ctx_init(int cpu)
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cpu, per_cpu(hardirq_ctx, cpu), per_cpu(softirq_ctx, cpu));
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}
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+#ifndef CONFIG_PREEMPT_RT_FULL
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asmlinkage void do_softirq(void)
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{
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unsigned long flags;
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@@ -179,6 +180,7 @@ asmlinkage void do_softirq(void)
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local_irq_restore(flags);
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}
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+#endif
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bool handle_irq(unsigned irq, struct pt_regs *regs)
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{
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Index: linux-3.2/arch/x86/kernel/irq_64.c
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===================================================================
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--- linux-3.2.orig/arch/x86/kernel/irq_64.c
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+++ linux-3.2/arch/x86/kernel/irq_64.c
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@@ -65,7 +65,7 @@ bool handle_irq(unsigned irq, struct pt_
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return true;
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}
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-
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+#ifndef CONFIG_PREEMPT_RT_FULL
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extern void call_softirq(void);
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asmlinkage void do_softirq(void)
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@@ -85,3 +85,4 @@ asmlinkage void do_softirq(void)
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}
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local_irq_restore(flags);
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}
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+#endif
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Index: linux-3.2/include/linux/interrupt.h
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===================================================================
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--- linux-3.2.orig/include/linux/interrupt.h
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+++ linux-3.2/include/linux/interrupt.h
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@@ -456,10 +456,9 @@ struct softirq_action
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void (*action)(struct softirq_action *);
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};
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+#ifndef CONFIG_PREEMPT_RT_FULL
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asmlinkage void do_softirq(void);
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asmlinkage void __do_softirq(void);
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-
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-#ifndef CONFIG_PREEMPT_RT_FULL
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static inline void thread_do_softirq(void) { do_softirq(); }
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#else
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extern void thread_do_softirq(void);
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