compiler.h: add CC_USING_PATCHABLE_FUNCTION_ENTRY

commit 2809b392a62ae307da058a52d451b2fc3ce4de7e upstream.

This can be used for architectures implementing dynamic
ftrace via -fpatchable-function-entry.
Signed-off-by: NSven Schnelle <svens@stackframe.org>
Signed-off-by: NHelge Deller <deller@gmx.de>
Signed-off-by: Zou Cao<zoucao@linux.alibaba.com>
Acked-by: NBaoyou Xie <xie.baoyou@linux.alibaba.com>

include/linux/compiler_types.h

@@ -230,6 +230,8 @@ struct ftrace_likely_data {
 
 #if defined(CC_USING_HOTPATCH) && !defined(__CHECKER__)
 #define notrace			__attribute__((hotpatch(0, 0)))
+#elif defined(CC_USING_PATCHABLE_FUNCTION_ENTRY)
+#define notrace			__attribute__((patchable_function_entry(0, 0)))
 #else
 #define notrace			__attribute__((no_instrument_function))
 #endif