[PATCH 02/28] radix tree test suite: Add support for fallthrough attribute

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Add support for fallthrough on case statements.  Note this does *NOT*
check for missing fallthrough, but does allow compiling of code with
fallthrough in case statements.

Signed-off-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
---
 tools/testing/radix-tree/linux/kernel.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/tools/testing/radix-tree/linux/kernel.h b/tools/testing/radix-tree/linux/kernel.h
index c5c9d05f29da9..99979aeaa3796 100644
--- a/tools/testing/radix-tree/linux/kernel.h
+++ b/tools/testing/radix-tree/linux/kernel.h
@@ -24,4 +24,11 @@
 #define __must_hold(x)
 
 #define EXPORT_PER_CPU_SYMBOL_GPL(x)
+
+#if __has_attribute(__fallthrough__)
+# define fallthrough                    __attribute__((__fallthrough__))
+#else
+# define fallthrough                    do {} while (0)  /* fallthrough */
+#endif /* __has_attribute */
+
 #endif /* _KERNEL_H */
-- 
2.28.0





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