diff options
| author | Joe Perches <joe@perches.com> | 2012-03-23 15:02:16 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-03-23 16:58:36 -0700 |
| commit | 6061d949dd984c762ee272a88e77699fa675d1c8 (patch) | |
| tree | 2e19eecd34a716fc5ed9fa3f18a7db0a3edf6f5b | |
| parent | 97e834c5040b85e133d8d922111a62b2b853a406 (diff) | |
include/ and checkpatch: prefer __scanf to __attribute__((format(scanf,...)
It's equivalent to __printf, so prefer __scanf.
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | include/linux/compiler-gcc.h | 3 | ||||
| -rw-r--r-- | include/linux/kernel.h | 8 | ||||
| -rw-r--r-- | include/xen/xenbus.h | 4 | ||||
| -rwxr-xr-x | scripts/checkpatch.pl | 6 |
4 files changed, 14 insertions, 7 deletions
diff --git a/include/linux/compiler-gcc.h b/include/linux/compiler-gcc.h index 3fd17c249221..e5834aa24b9e 100644 --- a/include/linux/compiler-gcc.h +++ b/include/linux/compiler-gcc.h @@ -87,7 +87,8 @@ */ #define __pure __attribute__((pure)) #define __aligned(x) __attribute__((aligned(x))) -#define __printf(a,b) __attribute__((format(printf,a,b))) +#define __printf(a, b) __attribute__((format(printf, a, b))) +#define __scanf(a, b) __attribute__((format(scanf, a, b))) #define noinline __attribute__((noinline)) #define __attribute_const__ __attribute__((__const__)) #define __maybe_unused __attribute__((unused)) diff --git a/include/linux/kernel.h b/include/linux/kernel.h index d801acb5e680..f2085b541a24 100644 --- a/include/linux/kernel.h +++ b/include/linux/kernel.h @@ -328,10 +328,10 @@ extern __printf(2, 3) char *kasprintf(gfp_t gfp, const char *fmt, ...); extern char *kvasprintf(gfp_t gfp, const char *fmt, va_list args); -extern int sscanf(const char *, const char *, ...) - __attribute__ ((format (scanf, 2, 3))); -extern int vsscanf(const char *, const char *, va_list) - __attribute__ ((format (scanf, 2, 0))); +extern __scanf(2, 3) +int sscanf(const char *, const char *, ...); +extern __scanf(2, 0) +int vsscanf(const char *, const char *, va_list); extern int get_option(char **str, int *pint); extern char *get_options(const char *str, int nints, int *ints); diff --git a/include/xen/xenbus.h b/include/xen/xenbus.h index e8c599b237c2..0a7515c1e3a4 100644 --- a/include/xen/xenbus.h +++ b/include/xen/xenbus.h @@ -139,9 +139,9 @@ int xenbus_transaction_start(struct xenbus_transaction *t); int xenbus_transaction_end(struct xenbus_transaction t, int abort); /* Single read and scanf: returns -errno or num scanned if > 0. */ +__scanf(4, 5) int xenbus_scanf(struct xenbus_transaction t, - const char *dir, const char *node, const char *fmt, ...) - __attribute__((format(scanf, 4, 5))); + const char *dir, const char *node, const char *fmt, ...); /* Single printf and write: returns -errno or 0. */ __printf(4, 5) diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl index a3b9782441f9..89d24b3ea438 100755 --- a/scripts/checkpatch.pl +++ b/scripts/checkpatch.pl @@ -3123,6 +3123,12 @@ sub process { "__printf(string-index, first-to-check) is preferred over __attribute__((format(printf, string-index, first-to-check)))\n" . $herecurr); } +# Check for __attribute__ format(scanf, prefer __scanf + if ($line =~ /\b__attribute__\s*\(\s*\(\s*format\s*\(\s*scanf\b/) { + WARN("PREFER_SCANF", + "__scanf(string-index, first-to-check) is preferred over __attribute__((format(scanf, string-index, first-to-check)))\n" . $herecurr); + } + # check for sizeof(&) if ($line =~ /\bsizeof\s*\(\s*\&/) { WARN("SIZEOF_ADDRESS", |