linux-kernel - [PATCH v3 6/7] Mark a few functions with the printf attribute

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Message-Id: <20160726224234.c680b28a327365604664cb2b@gmail.com>
Date:	Tue, 26 Jul 2016 22:42:34 +0200
From:	Emese Revfy <re.emese@...il.com>
To:	kernel-hardening@...ts.openwall.com
Cc:	pageexec@...email.hu, spender@...ecurity.net, mmarek@...e.com,
	keescook@...omium.org, linux-kernel@...r.kernel.org,
	yamada.masahiro@...ionext.com, linux-kbuild@...r.kernel.org,
	minipli@...linux.so, linux@...linux.org.uk,
	catalin.marinas@....com, linux@...musvillemoes.dk,
	david.brown@...aro.org, benh@...nel.crashing.org,
	tglx@...utronix.de, akpm@...ux-foundation.org,
	jlayton@...chiereds.net, arnd@...db.de, sam@...nborg.org,
	isdn@...ux-pingi.de
Subject: [PATCH v3 6/7] Mark a few functions with the printf attribute

This allows not only compile time format string checking but can also
increase the coverage of the initify plugin.

Signed-off-by: Emese Revfy <re.emese@...il.com>
---
 drivers/scsi/esas2r/esas2r_log.h | 4 ++--
 include/acpi/acpiosxf.h          | 3 ++-
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/scsi/esas2r/esas2r_log.h b/drivers/scsi/esas2r/esas2r_log.h
index 7b6397b..75b9d23 100644
--- a/drivers/scsi/esas2r/esas2r_log.h
+++ b/drivers/scsi/esas2r/esas2r_log.h
@@ -61,8 +61,8 @@ enum {
 #endif
 };
 
-int esas2r_log(const long level, const char *format, ...);
-int esas2r_log_dev(const long level,
+__printf(2, 3) int esas2r_log(const long level, const char *format, ...);
+__printf(3, 4) int esas2r_log_dev(const long level,
 		   const struct device *dev,
 		   const char *format,
 		   ...);
diff --git a/include/acpi/acpiosxf.h b/include/acpi/acpiosxf.h
index 562603d..7ee4475 100644
--- a/include/acpi/acpiosxf.h
+++ b/include/acpi/acpiosxf.h
@@ -337,11 +337,12 @@ acpi_status acpi_os_signal(u32 function, void *info);
  * Debug print routines
  */
 #ifndef ACPI_USE_ALTERNATE_PROTOTYPE_acpi_os_printf
+__printf(1, 2)
 void ACPI_INTERNAL_VAR_XFACE acpi_os_printf(const char *format, ...);
 #endif
 
 #ifndef ACPI_USE_ALTERNATE_PROTOTYPE_acpi_os_vprintf
-void acpi_os_vprintf(const char *format, va_list args);
+__printf(1, 0) void acpi_os_vprintf(const char *format, va_list args);
 #endif
 
 #ifndef ACPI_USE_ALTERNATE_PROTOTYPE_acpi_os_redirect_output
-- 
2.8.1