linux-kernel - [PATCH v2 2/6] seq_file: Mark binary printing functions with _

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Message-ID: <20250321144822.324050-3-andriy.shevchenko@linux.intel.com>
Date: Fri, 21 Mar 2025 16:40:48 +0200
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Christophe JAILLET <christophe.jaillet@...adoo.fr>,
	Kees Cook <kees@...nel.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	"Masami Hiramatsu (Google)" <mhiramat@...nel.org>,
	linux-kernel@...r.kernel.org,
	linux-hardening@...r.kernel.org,
	linux-trace-kernel@...r.kernel.org
Cc: Andy Shevchenko <andy@...nel.org>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Petr Mladek <pmladek@...e.com>,
	Rasmus Villemoes <linux@...musvillemoes.dk>,
	Sergey Senozhatsky <senozhatsky@...omium.org>
Subject: [PATCH v2 2/6] seq_file: Mark binary printing functions with __printf() attribute

Binary printing functions are using printf() type of format, and compiler
is not happy about them as is:

fs/seq_file.c:418:35: error: function ‘seq_bprintf’ might be a candidate for ‘gnu_printf’ format attribute [-Werror=suggest-attribute=format]

Fix the compilation errors by adding __printf() attribute.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 include/linux/seq_file.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/linux/seq_file.h b/include/linux/seq_file.h
index 2fb266ea69fa..d6ebf0596510 100644
--- a/include/linux/seq_file.h
+++ b/include/linux/seq_file.h
@@ -181,6 +181,7 @@ int seq_open_private(struct file *, const struct seq_operations *, int);
 int seq_release_private(struct inode *, struct file *);
 
 #ifdef CONFIG_BINARY_PRINTF
+__printf(2, 0)
 void seq_bprintf(struct seq_file *m, const char *f, const u32 *binary);
 #endif
 
-- 
2.47.2