* Re: [PATCH] add gcc printf format checks
[not found] ` <200801061858.50975.deller@gmx.de>
@ 2008-01-07 19:14 ` Mathieu Desnoyers
0 siblings, 0 replies; 3+ messages in thread
From: Mathieu Desnoyers @ 2008-01-07 19:14 UTC (permalink / raw)
To: Helge Deller; +Cc: Joe Perches, linux-kernel, Andrew Morton, Robert P. J. Day
* Helge Deller (deller@gmx.de) wrote:
> On Sunday 06 January 2008, Joe Perches wrote:
> > __attribute__((format(printf, 1, 2))) seems to be the preferred
> > form. 91 to 1.
> >
> > I think __printf should be removed from gcc-compiler.h
> > and the only use in include/linux/marker.h converted.
>
> Personally I would prefer to convert every user over to the smaller __printf() version.
> Nevertheless, below is an updated patch which does what you propose.
>
> =======================================
>
> [PATCH] add gcc printf format checks and drop __printf() define
>
> Trivial patch which adds some missing printf format checking to
> compat.h and msdos_fs.h. Additionally, it converts the one and
> only user of the __printf macro to __attribute__ (printf).
>
> Signed-off-by: Helge Deller <deller@gmx.de>
>
>
> diff --git a/include/linux/compiler-gcc.h b/include/linux/compiler-gcc.h
> index fe23792..3579ac8 100644
> --- a/include/linux/compiler-gcc.h
> +++ b/include/linux/compiler-gcc.h
> @@ -49,7 +49,6 @@
> */
> #define __pure __attribute__((pure))
> #define __aligned(x) __attribute__((aligned(x)))
> -#define __printf(a,b) __attribute__((format(printf,a,b)))
> #define noinline __attribute__((noinline))
> #define __attribute_const__ __attribute__((__const__))
> #define __maybe_unused __attribute__((unused))
>
> diff --git a/include/linux/marker.h b/include/linux/marker.h
> index 5f36cf9..0fb3f0e 100644
> --- a/include/linux/marker.h
> +++ b/include/linux/marker.h
> @@ -100,7 +100,8 @@ static inline void marker_update_probe_range(struct marker *begin,
> #define MARK_NOARGS " "
>
> /* To be used for string format validity checking with gcc */
> -static inline void __printf(1, 2) __mark_check_format(const char *fmt, ...)
> +static inline void __attribute__((format(printf,1,2)))
> + __mark_check_format(const char *fmt, ...)
If the markers are the only user of this macro, it makes sense to change
them and remove the macro. I have no strong opinion about this, but it
is technically ok.
Acked-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
> {
> }
>
> diff --git a/include/linux/compat.h b/include/linux/compat.h
> index 0e69d2c..6d465ad 100644
> --- a/include/linux/compat.h
> +++ b/include/linux/compat.h
> @@ -232,7 +232,7 @@ extern int put_compat_itimerspec(struct compat_itimerspec __user *dst,
>
> asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp);
>
> -extern int compat_printk(const char *fmt, ...);
> +extern int compat_printk(const char *fmt, ...) __attribute__ ((format(printf,1,2)));
> extern void sigset_from_compat(sigset_t *set, compat_sigset_t *compat);
>
> asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
>
> diff --git a/include/linux/msdos_fs.h b/include/linux/msdos_fs.h
> index f950921..dd2b6bb 100644
> --- a/include/linux/msdos_fs.h
> +++ b/include/linux/msdos_fs.h
> @@ -419,7 +419,8 @@ extern int fat_fill_super(struct super_block *sb, void *data, int silent,
> extern int fat_flush_inodes(struct super_block *sb, struct inode *i1,
> struct inode *i2);
> /* fat/misc.c */
> -extern void fat_fs_panic(struct super_block *s, const char *fmt, ...);
> +extern void fat_fs_panic(struct super_block *s, const char *fmt, ...)
> + __attribute__ ((format(printf,2,3)));
> extern void fat_clusters_flush(struct super_block *sb);
> extern int fat_chain_add(struct inode *inode, int new_dclus, int nr_cluster);
> extern int date_dos2unix(unsigned short time, unsigned short date);
--
Mathieu Desnoyers
Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68
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