[patch] use __asm__ rather than asm in asm-s390/ptrace.h

Since asm-s390/ptrace.h is exported to userspace, we need to make sure we use
__asm__() rather than asm() as the latter is disabled when gcc compiles with
GNU extensions turned off (like -std=c99).

Signed-off-by: Mike Frysinger <[email protected]>
---
diff --git a/include/asm-s390/ptrace.h b/include/asm-s390/ptrace.h
index fa6ca87..4add355 100644
--- a/include/asm-s390/ptrace.h
+++ b/include/asm-s390/ptrace.h
@@ -475,7 +475,7 @@ extern void show_regs(struct pt_regs * regs);
 static inline void
 psw_set_key(unsigned int key)
 {
-	asm volatile("spka 0(%0)" : : "d" (key));
+	__asm__ __volatile__("spka 0(%0)" : : "d" (key));
 }
 
 #endif /* __ASSEMBLY__ */
-
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