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authorNicolas Iooss <nicolas.iooss_linux@m4x.org>2015-07-18 02:23:42 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2015-07-18 02:39:53 +0300
commit8db1486065141e619e4855b84e350ef32064f7e1 (patch)
tree438cace62ece1251656b38fbf428cf5aa5184fb8 /include/linux/cpu.h
parent7f9be77555bb2e52de84e9dddf7b4eb20cc6e171 (diff)
downloadlinux-8db1486065141e619e4855b84e350ef32064f7e1.tar.xz
include, lib: add __printf attributes to several function prototypes
Using __printf attributes helps to detect several format string issues at compile time (even though -Wformat-security is currently disabled in Makefile). For example it can detect when formatting a pointer as a number, like the issue fixed in commit a3fa71c40f18 ("wl18xx: show rx_frames_per_rates as an array as it really is"), or when the arguments do not match the format string, c.f. for example commit 5ce1aca81435 ("reiserfs: fix __RASSERT format string"). To prevent similar bugs in the future, add a __printf attribute to every function prototype which needs one in include/linux/ and lib/. These functions were mostly found by using gcc's -Wsuggest-attribute=format flag. Signed-off-by: Nicolas Iooss <nicolas.iooss_linux@m4x.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Felipe Balbi <balbi@ti.com> Cc: Joel Becker <jlbec@evilplan.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/cpu.h')
-rw-r--r--include/linux/cpu.h7
1 files changed, 4 insertions, 3 deletions
diff --git a/include/linux/cpu.h b/include/linux/cpu.h
index c0fb6b1b4712..23c30bdcca86 100644
--- a/include/linux/cpu.h
+++ b/include/linux/cpu.h
@@ -40,9 +40,10 @@ extern void cpu_remove_dev_attr(struct device_attribute *attr);
extern int cpu_add_dev_attr_group(struct attribute_group *attrs);
extern void cpu_remove_dev_attr_group(struct attribute_group *attrs);
-extern struct device *cpu_device_create(struct device *parent, void *drvdata,
- const struct attribute_group **groups,
- const char *fmt, ...);
+extern __printf(4, 5)
+struct device *cpu_device_create(struct device *parent, void *drvdata,
+ const struct attribute_group **groups,
+ const char *fmt, ...);
#ifdef CONFIG_HOTPLUG_CPU
extern void unregister_cpu(struct cpu *cpu);
extern ssize_t arch_cpu_probe(const char *, size_t);