---

yaml
---
r: 73082
b: refs/heads/master
c: 110ed28
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 0e670685e4925930000a678c74eb1cbf23b415fa
+refs/heads/master: 110ed28246a0063a5984d7f72ba5c97f154a51cf

trunk/arch/sh/Kconfig.debug

@@ -86,6 +86,14 @@ config 4KSTACKS
 	  on the VM subsystem for higher order allocations. This option
 	  will also use IRQ stacks to compensate for the reduced stackspace.
 
+config IRQSTACKS
+	bool "Use separate kernel stacks when processing interrupts"
+	depends on DEBUG_KERNEL
+	help
+	  If you say Y here the kernel will use separate kernel stacks
+	  for handling hard and soft interrupts.  This can help avoid
+	  overflowing the process kernel stacks.
+
 config SH_KGDB
 	bool "Include KGDB kernel debugger"
 	select FRAME_POINTER

trunk/arch/sh/kernel/irq.c

@@ -69,7 +69,7 @@ int show_interrupts(struct seq_file *p, void *v)
 }
 #endif
 
-#ifdef CONFIG_4KSTACKS
+#ifdef CONFIG_IRQSTACKS
 /*
  * per-CPU IRQ handling contexts (thread information and stack)
  */
@@ -85,7 +85,7 @@ static union irq_ctx *softirq_ctx[NR_CPUS] __read_mostly;
 asmlinkage int do_IRQ(unsigned int irq, struct pt_regs *regs)
 {
 	struct pt_regs *old_regs = set_irq_regs(regs);
-#ifdef CONFIG_4KSTACKS
+#ifdef CONFIG_IRQSTACKS
 	union irq_ctx *curctx, *irqctx;
 #endif
 
@@ -109,7 +109,7 @@ asmlinkage int do_IRQ(unsigned int irq, struct pt_regs *regs)
 
 	irq = irq_demux(evt2irq(irq));
 
-#ifdef CONFIG_4KSTACKS
+#ifdef CONFIG_IRQSTACKS
 	curctx = (union irq_ctx *)current_thread_info();
 	irqctx = hardirq_ctx[smp_processor_id()];
 
@@ -157,7 +157,7 @@ asmlinkage int do_IRQ(unsigned int irq, struct pt_regs *regs)
 	return 1;
 }
 
-#ifdef CONFIG_4KSTACKS
+#ifdef CONFIG_IRQSTACKS
 static char softirq_stack[NR_CPUS * THREAD_SIZE]
 		__attribute__((__section__(".bss.page_aligned")));
 

trunk/include/asm-sh/irq.h

@@ -41,7 +41,7 @@ static inline int generic_irq_demux(int irq)
 #define irq_canonicalize(irq)	(irq)
 #define irq_demux(irq)		sh_mv.mv_irq_demux(irq)
 
-#ifdef CONFIG_4KSTACKS
+#ifdef CONFIG_IRQSTACKS
 extern void irq_ctx_init(int cpu);
 extern void irq_ctx_exit(int cpu);
 # define __ARCH_HAS_DO_SOFTIRQ