s390/compiler.h Fix sparse vs. hotpatch

sparse does not understand the s390 specific hotpatch attribute and
floods the log with messages like
include/uapi/linux/swab.h:92:8: error: attribute 'hotpatch': unknown attribute

Let's just dont use it, if __CHECKER__ is defined.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/include/linux/compiler.h b/include/linux/compiler.h
index c836eb2..449cb67 100644
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -56,7 +56,7 @@
 #include <linux/compiler-gcc.h>
 #endif
 
-#ifdef CC_USING_HOTPATCH
+#if defined(CC_USING_HOTPATCH) && !defined(__CHECKER__)
 #define notrace __attribute__((hotpatch(0,0)))
 #else
 #define notrace __attribute__((no_instrument_function))