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Commit 75f2a4ea authored by Himangi Saraogi's avatar Himangi Saraogi Committed by Greg Kroah-Hartman
Browse files

devres: Add devm_kasprintf and devm_kvasprintf API 



devm_kasprintf() and devm_kvasprintf() are the managed counterparts
for kasprintf() and kvasprintf().

Signed-off-by: default avatarHimangi Saraogi <himangi774@gmail.com>
Acked-by: default avatarJulia Lawall <julia.lawall@lip6.fr>
Acked-by: default avatarTejun Heo <tj@kernel.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 871379dc

drivers/base/devres.c

+55 −0
Original line number Original line Diff line number Diff line
@@ -816,6 +816,61 @@ char *devm_kstrdup(struct device *dev, const char *s, gfp_t gfp) 
}

}

EXPORT_SYMBOL_GPL(devm_kstrdup);

EXPORT_SYMBOL_GPL(devm_kstrdup);





/**

 * devm_kvasprintf - Allocate resource managed space

 *			for the formatted string.

 * @dev: Device to allocate memory for

 * @gfp: the GFP mask used in the devm_kmalloc() call when

 *       allocating memory

 * @fmt: the formatted string to duplicate

 * @ap: the list of tokens to be placed in the formatted string

 * RETURNS:

 * Pointer to allocated string on success, NULL on failure.

 */

char *devm_kvasprintf(struct device *dev, gfp_t gfp, const char *fmt,

		      va_list ap)

{

	unsigned int len;

	char *p;

	va_list aq;



	va_copy(aq, ap);

	len = vsnprintf(NULL, 0, fmt, aq);

	va_end(aq);



	p = devm_kmalloc(dev, len+1, gfp);

	if (!p)

		return NULL;



	vsnprintf(p, len+1, fmt, ap);



	return p;

}

EXPORT_SYMBOL(devm_kvasprintf);



/**

 * devm_kasprintf - Allocate resource managed space

 *		and copy an existing formatted string into that

 * @dev: Device to allocate memory for

 * @gfp: the GFP mask used in the devm_kmalloc() call when

 *       allocating memory

 * @fmt: the string to duplicate

 * RETURNS:

 * Pointer to allocated string on success, NULL on failure.

 */

char *devm_kasprintf(struct device *dev, gfp_t gfp, const char *fmt, ...)

{

	va_list ap;

	char *p;



	va_start(ap, fmt);

	p = devm_kvasprintf(dev, gfp, fmt, ap);

	va_end(ap);



	return p;

}

EXPORT_SYMBOL_GPL(devm_kasprintf);



/**

/**

 * devm_kfree - Resource-managed kfree

 * devm_kfree - Resource-managed kfree

 * @dev: Device this memory belongs to

 * @dev: Device this memory belongs to

include/linux/device.h

+4 −0
Original line number Original line Diff line number Diff line
@@ -605,6 +605,10 @@ extern int devres_release_group(struct device *dev, void *id); 




/* managed devm_k.alloc/kfree for device drivers */

/* managed devm_k.alloc/kfree for device drivers */

extern void *devm_kmalloc(struct device *dev, size_t size, gfp_t gfp);

extern void *devm_kmalloc(struct device *dev, size_t size, gfp_t gfp);

extern char *devm_kvasprintf(struct device *dev, gfp_t gfp, const char *fmt,

			     va_list ap);

extern char *devm_kasprintf(struct device *dev, gfp_t gfp,

			    const char *fmt, ...);

static inline void *devm_kzalloc(struct device *dev, size_t size, gfp_t gfp)

static inline void *devm_kzalloc(struct device *dev, size_t size, gfp_t gfp)

{

{

	return devm_kmalloc(dev, size, gfp | __GFP_ZERO);

	return devm_kmalloc(dev, size, gfp | __GFP_ZERO);