linux-kernel - [PATCH] ARM: kprobes: address gcc -Wempty-body warning

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Date:   Mon, 22 Mar 2021 12:45:50 +0100
From:   Arnd Bergmann <arnd@...nel.org>
To:     Russell King <linux@...linux.org.uk>
Cc:     Arnd Bergmann <arnd@...db.de>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] ARM: kprobes: address gcc -Wempty-body warning

From: Arnd Bergmann <arnd@...db.de>

Building with 'make W=1' shows a warning in some configurations
when 'verbose()' is defined to be empty.

arch/arm/probes/kprobes/test-core.c: In function 'kprobes_test_case_start':
arch/arm/probes/kprobes/test-core.c:1367:26: error: suggest braces around empty body in an 'else' statement [-Werror=empty-body]
 1367 |      current_instruction);
      |                          ^

Change the definition of verbose() to use no_printk(), allowing format
string checking and avoiding the warning.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 arch/arm/probes/kprobes/test-core.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/probes/kprobes/test-core.h b/arch/arm/probes/kprobes/test-core.h
index 19a5b2add41e..6e42c0dd82a5 100644
--- a/arch/arm/probes/kprobes/test-core.h
+++ b/arch/arm/probes/kprobes/test-core.h
@@ -98,7 +98,7 @@ struct test_arg_end {
 #if VERBOSE
 #define verbose(fmt, ...) pr_info(fmt, ##__VA_ARGS__)
 #else
-#define verbose(fmt, ...)
+#define verbose(fmt, ...) no_printk(fmt, ##__VA_ARGS__)
 #endif
 
 #define TEST_GROUP(title)					\
-- 
2.29.2