s390: add current_stack_pointer() helper function

[cascardo/linux.git] / arch / s390 / include / asm / processor.h

diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h
index 1c4fe12..073e18b 100644 (file)
--- a/arch/s390/include/asm/processor.h
+++ b/arch/s390/include/asm/processor.h
@@ -203,6 +203,14 @@ unsigned long get_wchan(struct task_struct *p);
 /* Has task runtime instrumentation enabled ? */
 #define is_ri_task(tsk) (!!(tsk)->thread.ri_cb)
 
+static inline unsigned long current_stack_pointer(void)
+{
+       unsigned long sp;
+
+       asm volatile("la %0,0(15)" : "=a" (sp));
+       return sp;
+}
+
 static inline unsigned short stap(void)
 {
        unsigned short cpu_address;