175 lines
4.0 KiB
Diff
175 lines
4.0 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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Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/3.12/patches-3.12.1-rt4.tar.xz
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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 | 2 ++
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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(+), 3 deletions(-)
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--- a/arch/powerpc/kernel/irq.c
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+++ b/arch/powerpc/kernel/irq.c
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@@ -594,6 +594,7 @@ 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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@@ -626,6 +627,7 @@ 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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irq_hw_number_t virq_to_hw(unsigned int virq)
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{
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--- a/arch/powerpc/kernel/misc_32.S
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+++ b/arch/powerpc/kernel/misc_32.S
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@@ -40,6 +40,7 @@
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* We store the saved ksp_limit in the unused part
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* of the STACK_FRAME_OVERHEAD
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*/
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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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@@ -56,6 +57,7 @@
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stw r10,THREAD+KSP_LIMIT(r2)
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mtlr r0
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blr
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+#endif
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_GLOBAL(call_do_irq)
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mflr r0
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--- a/arch/powerpc/kernel/misc_64.S
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+++ b/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 @@
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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_do_irq)
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mflr r0
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--- a/arch/sh/kernel/irq.c
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+++ b/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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--- a/arch/sparc/kernel/irq_64.c
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+++ b/arch/sparc/kernel/irq_64.c
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@@ -698,6 +698,7 @@ 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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@@ -723,6 +724,7 @@ 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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--- a/arch/x86/kernel/entry_64.S
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+++ b/arch/x86/kernel/entry_64.S
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@@ -1341,6 +1341,7 @@ END(native_load_gs_index)
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jmp 2b
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.previous
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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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@@ -1360,6 +1361,7 @@ 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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--- a/arch/x86/kernel/irq_32.c
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+++ b/arch/x86/kernel/irq_32.c
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@@ -149,6 +149,7 @@ void 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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--- a/arch/x86/kernel/irq_64.c
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+++ b/arch/x86/kernel/irq_64.c
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@@ -88,7 +88,7 @@ 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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@@ -108,3 +108,4 @@ 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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--- a/include/linux/interrupt.h
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+++ b/include/linux/interrupt.h
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@@ -377,10 +377,9 @@ 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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