[ARM] Add support for pause_on_oops and display preempt/smp options

Add calls to oops_enter() and oops_exit() to __die(), so that
things like lockdep know when an oops occurs.

Add suffixes to the oops report to indicate whether the running
kernel has been built with preempt or smp support.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c
index 10ff36e..1b68d36 100644 (file)
--- a/arch/arm/kernel/traps.c
+++ b/arch/arm/kernel/traps.c
@@ -204,12 +204,24 @@ void show_stack(struct task_struct *tsk, unsigned long *sp)
        barrier();
 }
 
+#ifdef CONFIG_PREEMPT
+#define S_PREEMPT " PREEMPT"
+#else
+#define S_PREEMPT ""
+#endif
+#ifdef CONFIG_SMP
+#define S_SMP " SMP"
+#else
+#define S_SMP ""
+#endif
+
 static void __die(const char *str, int err, struct thread_info *thread, struct pt_regs *regs)
 {
        struct task_struct *tsk = thread->task;
        static int die_counter;
 
-       printk("Internal error: %s: %x [#%d]\n", str, err, ++die_counter);
+       printk("Internal error: %s: %x [#%d]" S_PREEMPT S_SMP "\n",
+              str, err, ++die_counter);
        print_modules();
        __show_regs(regs);
        printk("Process %s (pid: %d, stack limit = 0x%p)\n",
@@ -232,6 +244,8 @@ NORET_TYPE void die(const char *str, struct pt_regs *regs, int err)
 {
        struct thread_info *thread = current_thread_info();
 
+       oops_enter();
+
        console_verbose();
        spin_lock_irq(&die_lock);
        bust_spinlocks(1);
@@ -239,9 +253,13 @@ NORET_TYPE void die(const char *str, struct pt_regs *regs, int err)
        bust_spinlocks(0);
        spin_unlock_irq(&die_lock);
 
+       if (in_interrupt())
+               panic("Fatal exception in interrupt");
+
        if (panic_on_oops)
                panic("Fatal exception");
 
+       oops_exit();
        do_exit(SIGSEGV);
 }