[ARM] Re-organise die()

Provide __die() which can be called from various contexts to provide
an oops report.

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 66e5a05..45e9ea6 100644 (file)
--- a/arch/arm/kernel/traps.c
+++ b/arch/arm/kernel/traps.c
@@ -198,25 +198,16 @@ void show_stack(struct task_struct *tsk, unsigned long *sp)
        barrier();
 }
 
-DEFINE_SPINLOCK(die_lock);
-
-/*
- * This function is protected against re-entrancy.
- */
-NORET_TYPE void die(const char *str, struct pt_regs *regs, int err)
+static void __die(const char *str, int err, struct thread_info *thread, struct pt_regs *regs)
 {
-       struct task_struct *tsk = current;
+       struct task_struct *tsk = thread->task;
        static int die_counter;
 
-       console_verbose();
-       spin_lock_irq(&die_lock);
-       bust_spinlocks(1);
-
        printk("Internal error: %s: %x [#%d]\n", str, err, ++die_counter);
        print_modules();
        __show_regs(regs);
        printk("Process %s (pid: %d, stack limit = 0x%p)\n",
-               tsk->comm, tsk->pid, tsk->thread_info + 1);
+               tsk->comm, tsk->pid, thread + 1);
 
        if (!user_mode(regs) || in_interrupt()) {
                dump_mem("Stack: ", regs->ARM_sp,
@@ -224,7 +215,21 @@ NORET_TYPE void die(const char *str, struct pt_regs *regs, int err)
                dump_backtrace(regs, tsk);
                dump_instr(regs);
        }
+}
 
+DEFINE_SPINLOCK(die_lock);
+
+/*
+ * This function is protected against re-entrancy.
+ */
+NORET_TYPE void die(const char *str, struct pt_regs *regs, int err)
+{
+       struct thread_info *thread = current_thread_info();
+
+       console_verbose();
+       spin_lock_irq(&die_lock);
+       bust_spinlocks(1);
+       __die(str, err, thread, regs);
        bust_spinlocks(0);
        spin_unlock_irq(&die_lock);
        do_exit(SIGSEGV);