[PATCH] tools/bootconfig: Fix wrong __VA_ARGS__ usage

[Masami Hiramatsu]

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__.

Fixes: 950313ebf79c ("tools: bootconfig: Add bootconfig command")
Reported-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Signed-off-by: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
---
 tools/bootconfig/include/linux/printk.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/bootconfig/include/linux/printk.h b/tools/bootconfig/include/linux/printk.h
index 017bcd6912a5..e978a63d3222 100644
--- 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