From 9d9ae0f153294e0d23f9216ac093b97f2875eb75 Mon Sep 17 00:00:00 2001
From: Bart Van Assche <bvanassche@acm.org>
Date: Tue, 15 Sep 2020 03:44:03 +0000
Subject: [PATCH] scst: Restore compatibility with gcc 4.x (RHEL 7.x)

git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@9161 d57e44dd-8a1f-0410-8b47-8ef2f437770f
---
 scst/include/backport.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/scst/include/backport.h b/scst/include/backport.h
index 0358636d4..8ffa83254 100644
--- a/scst/include/backport.h
+++ b/scst/include/backport.h
@@ -246,7 +246,15 @@ static inline void cpu_to_be32_array(__be32 *dst, const u32 *src, size_t len)
  * pseudo keyword for switch/case use") # v5.4
  */
 #ifndef fallthrough
+#ifdef __has_attribute
+#if __has_attribute(__fallthrough__)
 #define fallthrough __attribute__((__fallthrough__))
+#else
+#define fallthrough do {} while (0)  /* fallthrough */
+#endif
+#else
+#define fallthrough do {} while (0)  /* fallthrough */
+#endif
 #endif
 
 /* <linux/cpumask.h> */