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| author | Pierre Ossman <drzeus@drzeus.cx> | 2008-12-31 21:56:05 +0300 |
|---|---|---|
| committer | Pierre Ossman <drzeus@drzeus.cx> | 2008-12-31 21:56:05 +0300 |
| commit | 418f19ea17a99421b22a64e101e14b6a16bed66d (patch) | |
| tree | 7c21fcc368c63f1f9907deac6d16b30bd371792d /arch/x86/kernel/irq_64.c | |
| parent | 98444d3dd975653a4a970ecc0dfc30918da92f60 (diff) | |
| parent | f6e10b865c3ea56bdaa8c6ecfee313b997900dbb (diff) | |
| download | linux-418f19ea17a99421b22a64e101e14b6a16bed66d.tar.xz | |
Merge branch 'master' of ../mmc
Diffstat (limited to 'arch/x86/kernel/irq_64.c')
| -rw-r--r-- | arch/x86/kernel/irq_64.c | 29 |
1 files changed, 14 insertions, 15 deletions
diff --git a/arch/x86/kernel/irq_64.c b/arch/x86/kernel/irq_64.c index 60eb84eb77a0..a174a217eb1a 100644 --- a/arch/x86/kernel/irq_64.c +++ b/arch/x86/kernel/irq_64.c @@ -13,12 +13,12 @@ #include <linux/seq_file.h> #include <linux/module.h> #include <linux/delay.h> +#include <linux/ftrace.h> #include <asm/uaccess.h> #include <asm/io_apic.h> #include <asm/idle.h> #include <asm/smp.h> -#ifdef CONFIG_DEBUG_STACKOVERFLOW /* * Probabilistic stack overflow check: * @@ -28,26 +28,25 @@ */ 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 * SMP cross-CPU interrupts have their own specific * handlers). */ -asmlinkage unsigned int do_IRQ(struct pt_regs *regs) +asmlinkage unsigned int __irq_entry do_IRQ(struct pt_regs *regs) { struct pt_regs *old_regs = set_irq_regs(regs); struct irq_desc *desc; @@ -60,9 +59,7 @@ 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)) @@ -94,6 +91,8 @@ void fixup_irqs(cpumask_t map) int break_affinity = 0; int set_affinity = 1; + if (!desc) + continue; if (irq == 2) continue; |