summaryrefslogtreecommitdiffstats
path: root/arch/x86/kernel/irq_64.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/x86/kernel/irq_64.c')
-rw-r--r--arch/x86/kernel/irq_64.c24
1 files changed, 10 insertions, 14 deletions
diff --git a/arch/x86/kernel/irq_64.c b/arch/x86/kernel/irq_64.c
index 60eb84eb77a..1d3d0e71b04 100644
--- a/arch/x86/kernel/irq_64.c
+++ b/arch/x86/kernel/irq_64.c
@@ -18,7 +18,6 @@
#include <asm/idle.h>
#include <asm/smp.h>
-#ifdef CONFIG_DEBUG_STACKOVERFLOW
/*
* Probabilistic stack overflow check:
*
@@ -28,19 +27,18 @@
*/
static inline void stack_overflow_check(struct pt_regs *regs)
{
+#ifdef CONFIG_DEBUG_STACKOVERFLOW
u64 curbase = (u64)task_stack_page(current);
- static unsigned long warned = -60*HZ;
-
- if (regs->sp >= curbase && regs->sp <= curbase + THREAD_SIZE &&
- regs->sp < curbase + sizeof(struct thread_info) + 128 &&
- time_after(jiffies, warned + 60*HZ)) {
- printk("do_IRQ: %s near stack overflow (cur:%Lx,sp:%lx)\n",
- current->comm, curbase, regs->sp);
- show_stack(NULL,NULL);
- warned = jiffies;
- }
-}
+
+ WARN_ONCE(regs->sp >= curbase &&
+ regs->sp <= curbase + THREAD_SIZE &&
+ regs->sp < curbase + sizeof(struct thread_info) +
+ sizeof(struct pt_regs) + 128,
+
+ "do_IRQ: %s near stack overflow (cur:%Lx,sp:%lx)\n",
+ current->comm, curbase, regs->sp);
#endif
+}
/*
* do_IRQ handles all normal device IRQ's (the special
@@ -60,9 +58,7 @@ asmlinkage unsigned int do_IRQ(struct pt_regs *regs)
irq_enter();
irq = __get_cpu_var(vector_irq)[vector];
-#ifdef CONFIG_DEBUG_STACKOVERFLOW
stack_overflow_check(regs);
-#endif
desc = irq_to_desc(irq);
if (likely(desc))