linux-kernel - [PATCH v4 1/6] tools/bootconfig: Fix a build error accroding to undefined fallthrough

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Message-Id: <162262192986.264090.4181938468540696580.stgit@devnote2>
Date:   Wed,  2 Jun 2021 17:18:50 +0900
From:   Masami Hiramatsu <mhiramat@...nel.org>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     Masami Hiramatsu <mhiramat@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Devin Moore <devinmoore@...gle.com>
Subject: [PATCH v4 1/6] tools/bootconfig: Fix a build error accroding to undefined fallthrough

Since the "fallthrough" is defined only in the kernel, building
lib/bootconfig.c as a part of user-space tools causes a build
error.

Add a dummy fallthrough to avoid the build error.

Cc: stable@...r.kernel.org
Fixes: 4c1ca831adb1 ("Revert "lib: Revert use of fallthrough pseudo-keyword in lib/"")
Signed-off-by: Masami Hiramatsu <mhiramat@...nel.org>
---
 tools/bootconfig/include/linux/bootconfig.h |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tools/bootconfig/include/linux/bootconfig.h b/tools/bootconfig/include/linux/bootconfig.h
index 078cbd2ba651..de7f30f99af3 100644
--- a/tools/bootconfig/include/linux/bootconfig.h
+++ b/tools/bootconfig/include/linux/bootconfig.h
@@ -4,4 +4,8 @@
 
 #include "../../../../include/linux/bootconfig.h"
 
+#ifndef fallthrough
+# define fallthrough
+#endif
+
 #endif