Merge branch 'tracing-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...

[~andy/linux] / arch / x86 / kernel / irq_64.c

diff --git a/arch/x86/kernel/irq_64.c b/arch/x86/kernel/irq_64.c
index 11c65e811ffe19f447d36251a46cc91a35cd94f2..1df869e5bd0b935fc12e5a65b254eeb985df3f6f 100644 (file)
--- a/arch/x86/kernel/irq_64.c
+++ b/arch/x86/kernel/irq_64.c
@@ -19,7 +19,6 @@
 #include <asm/idle.h>
 #include <asm/smp.h>
 
-#ifdef CONFIG_DEBUG_STACKOVERFLOW
 /*
  * Probabilistic stack overflow check:
  *
@@ -29,19 +28,18 @@
  */
 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
@@ -61,9 +59,7 @@ asmlinkage unsigned int __irq_entry 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))