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Commit 3046365b authored by Srinivas Pandruvada's avatar Srinivas Pandruvada Committed by Jonathan Cameron
Browse files

devres: introduce API "devm_kmemdup 



Introduce devm_kmemdup, which uses resource managed kmalloc.
There are several request from maintainers to add this instead
of using kmemdup.

Signed-off-by: default avatarSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: default avatarJonathan Cameron <jic23@kernel.org>
parent 37aa4836

Documentation/driver-model/devres.txt

+1 −0
Original line number Diff line number Diff line
@@ -236,6 +236,7 @@ certainly invest a bit more effort into libata core layer). 
MEM

  devm_kzalloc()

  devm_kfree()

  devm_kmemdup()



IIO

  devm_iio_device_alloc()

drivers/base/devres.c

+21 −0
Original line number Diff line number Diff line
@@ -831,3 +831,24 @@ void devm_kfree(struct device *dev, void *p) 
	WARN_ON(rc);

}

EXPORT_SYMBOL_GPL(devm_kfree);



/**

 * devm_kmemdup - Resource-managed kmemdup

 * @dev: Device this memory belongs to

 * @src: Memory region to duplicate

 * @len: Memory region length

 * @gfp: GFP mask to use

 *

 * Duplicate region of a memory using resource managed kmalloc

 */

void *devm_kmemdup(struct device *dev, const void *src, size_t len, gfp_t gfp)

{

	void *p;



	p = devm_kmalloc(dev, len, gfp);

	if (p)

		memcpy(p, src, len);



	return p;

}

EXPORT_SYMBOL_GPL(devm_kmemdup);

include/linux/device.h

+2 −0
Original line number Diff line number Diff line
@@ -623,6 +623,8 @@ static inline void *devm_kcalloc(struct device *dev, 
}

extern void devm_kfree(struct device *dev, void *p);

extern char *devm_kstrdup(struct device *dev, const char *s, gfp_t gfp);

extern void *devm_kmemdup(struct device *dev, const void *src, size_t len,

			  gfp_t gfp);



void __iomem *devm_ioremap_resource(struct device *dev, struct resource *res);

void __iomem *devm_request_and_ioremap(struct device *dev,