From 8b2a1fd1b394c60eaa2587716102dd5e9b4e5990 Mon Sep 17 00:00:00 2001
From: Zach Brown <zach.brown@oracle.com>
Date: Tue, 3 Oct 2006 01:16:15 -0700
Subject: [PATCH] [PATCH] pr_debug: check pr_debug() arguments
check pr_debug() arguments
When DEBUG isn't defined pr_debug() is defined away as an empty macro. By
throwing away the arguments we allow completely incorrect code to build.
Instead let's make it an empty inline which checks arguments and mark it so gcc
can check the format specification.
This results in a seemingly insignificant code size increase. A x86-64
allyesconfig:
text data bss dec hex filename
25354768 7191098 4854720 37400586 23ab00a vmlinux.before
25354945 7191138 4854720 37400803 23ab0e3 vmlinux
Signed-off-by: Zach Brown <zach.brown@oracle.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
include/linux/kernel.h | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 4d00988dad0..80f39cab470 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -216,8 +216,10 @@ extern void dump_stack(void);
#define pr_debug(fmt,arg...) \
printk(KERN_DEBUG fmt,##arg)
#else
-#define pr_debug(fmt,arg...) \
- do { } while (0)
+static inline int __attribute__ ((format (printf, 1, 2))) pr_debug(const char * fmt, ...)
+{
+ return 0;
+}
#endif
#define pr_info(fmt,arg...) \
--
2.41.3