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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2013-11-12 10:02:59 +0900 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-11-12 10:02:59 +0900 |
| commit | 1006fae359cc810c16354805c0cffbb6ffee602e (patch) | |
| tree | bd69f7a235f679a8336b237ed9722bb7f64db39a /arch/sh/kernel/irq.c | |
| parent | 70fdcb83db15c85a0495b07dc55d9347a4c2efd9 (diff) | |
| parent | 5702941eec32cfd7b8cf9e36a0936e48170011a4 (diff) | |
Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull IRQ changes from Ingo Molnar:
"The biggest change this cycle are the softirq/hardirq stack
interaction and nesting fixes, cleanups and reorganizations from
Frederic. This is the longer followup story to the softirq nesting
fix that is already upstream (commit ded797547548: "irq: Force hardirq
exit's softirq processing on its own stack")"
* 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
irqchip: bcm2835: Convert to use IRQCHIP_DECLARE macro
powerpc: Tell about irq stack coverage
x86: Tell about irq stack coverage
irq: Optimize softirq stack selection in irq exit
irq: Justify the various softirq stack choices
irq: Improve a bit softirq debugging
irq: Optimize call to softirq on hardirq exit
irq: Consolidate do_softirq() arch overriden implementations
x86/irq: Correct comment about i8259 initialization
Diffstat (limited to 'arch/sh/kernel/irq.c')
| -rw-r--r-- | arch/sh/kernel/irq.c | 57 |
1 files changed, 21 insertions, 36 deletions
diff --git a/arch/sh/kernel/irq.c b/arch/sh/kernel/irq.c index 063af10ff3c1..0833736afa32 100644 --- a/arch/sh/kernel/irq.c +++ b/arch/sh/kernel/irq.c @@ -149,47 +149,32 @@ void irq_ctx_exit(int cpu) hardirq_ctx[cpu] = NULL; } -asmlinkage void do_softirq(void) +void do_softirq_own_stack(void) { - unsigned long flags; struct thread_info *curctx; union irq_ctx *irqctx; u32 *isp; - if (in_interrupt()) - return; - - local_irq_save(flags); - - if (local_softirq_pending()) { - curctx = current_thread_info(); - irqctx = softirq_ctx[smp_processor_id()]; - irqctx->tinfo.task = curctx->task; - irqctx->tinfo.previous_sp = current_stack_pointer; - - /* build the stack frame on the softirq stack */ - isp = (u32 *)((char *)irqctx + sizeof(*irqctx)); - - __asm__ __volatile__ ( - "mov r15, r9 \n" - "jsr @%0 \n" - /* switch to the softirq stack */ - " mov %1, r15 \n" - /* restore the thread stack */ - "mov r9, r15 \n" - : /* no outputs */ - : "r" (__do_softirq), "r" (isp) - : "memory", "r0", "r1", "r2", "r3", "r4", - "r5", "r6", "r7", "r8", "r9", "r15", "t", "pr" - ); - - /* - * Shouldn't happen, we returned above if in_interrupt(): - */ - WARN_ON_ONCE(softirq_count()); - } - - local_irq_restore(flags); + curctx = current_thread_info(); + irqctx = softirq_ctx[smp_processor_id()]; + irqctx->tinfo.task = curctx->task; + irqctx->tinfo.previous_sp = current_stack_pointer; + + /* build the stack frame on the softirq stack */ + isp = (u32 *)((char *)irqctx + sizeof(*irqctx)); + + __asm__ __volatile__ ( + "mov r15, r9 \n" + "jsr @%0 \n" + /* switch to the softirq stack */ + " mov %1, r15 \n" + /* restore the thread stack */ + "mov r9, r15 \n" + : /* no outputs */ + : "r" (__do_softirq), "r" (isp) + : "memory", "r0", "r1", "r2", "r3", "r4", + "r5", "r6", "r7", "r8", "r9", "r15", "t", "pr" + ); } #else static inline void handle_one_irq(unsigned int irq) |