Merge branch 'x86/cpufeature' into irq/numa

[sfrench/cifs-2.6.git] / arch / xtensa / kernel / traps.c

diff --git a/arch/xtensa/kernel/traps.c b/arch/xtensa/kernel/traps.c
index 9f0b71189e940bccc462c933175c877060ded3c2..ba9ab9349782d3ffbf364d500f03005c433d2798 100644 (file)
--- a/arch/xtensa/kernel/traps.c
+++ b/arch/xtensa/kernel/traps.c
@@ -369,6 +369,18 @@ void show_regs(struct pt_regs * regs)
                       regs->syscall);
 }
 
+static __always_inline unsigned long *stack_pointer(struct task_struct *task)
+{
+       unsigned long *sp;
+
+       if (!task || task == current)
+               __asm__ __volatile__ ("mov %0, a1\n" : "=a"(sp));
+       else
+               sp = (unsigned long *)task->thread.sp;
+
+       return sp;
+}
+
 void show_trace(struct task_struct *task, unsigned long *sp)
 {
        unsigned long a0, a1, pc;
@@ -377,7 +389,7 @@ void show_trace(struct task_struct *task, unsigned long *sp)
        if (sp)
                a1 = (unsigned long)sp;
        else
-               a1 = task->thread.sp;
+               a1 = (unsigned long)stack_pointer(task);
 
        sp_start = a1 & ~(THREAD_SIZE-1);
        sp_end = sp_start + THREAD_SIZE;
@@ -420,7 +432,7 @@ void show_stack(struct task_struct *task, unsigned long *sp)
        unsigned long *stack;
 
        if (!sp)
-               sp = (unsigned long *)task->thread.sp;
+               sp = stack_pointer(task);
        stack = sp;
 
        printk("\nStack: ");