tools/bootconfig: Fix wrong __VA_ARGS__ usage

Since printk() wrapper macro uses __VA_ARGS__ without "##" prefix, it causes a build error if there is no variable arguments (e.g. only fmt is specified.) To fix this error, use ##__VA_ARGS__ instead of __VAR_ARGS__. Link: http://lkml.kernel.org/r/158108370130.2758.10893830923800978011.stgit@devnote2 Fixes: 950313e ("tools: bootconfig: Add bootconfig command") Reported-by: Michael Ellerman <[email protected]> Tested-by: Michael Ellerman <[email protected]> Signed-off-by: Masami Hiramatsu <[email protected]> Signed-off-by: Steven Rostedt (VMware) <[email protected]>
ambv · Feb 10, 2020 · 17d25ae · 17d25ae
1 parent a005740
commit 17d25ae
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/tools/bootconfig/include/linux/printk.h b/tools/bootconfig/include/linux/printk.h
@@ -7,7 +7,7 @@
 /* controllable printf */
 extern int pr_output;
 #define printk(fmt, ...)	\
-	(pr_output ? printf(fmt, __VA_ARGS__) : 0)
+	(pr_output ? printf(fmt, ##__VA_ARGS__) : 0)
 
 #define pr_err printk
 #define pr_warn	printk