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| author |   Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> | 2014-04-29 00:51:00 +0100 |
|---|---|---|
| committer |   Jonathan Cameron <jic23@kernel.org> | 2014-04-29 21:58:15 +0100 |
| commit | 3046365bb470f0ec2f7cf5cb07a8ee7e4b490103 (patch) | |
| tree | 66fbbb9b115c71814ff5a6e36566a47c492f0a6a | |
| parent | Merge 3.15-rc3 into staging-next (diff) | |
| download | linux-dev-3046365bb470f0ec2f7cf5cb07a8ee7e4b490103.tar.xz linux-dev-3046365bb470f0ec2f7cf5cb07a8ee7e4b490103.zip | |
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: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
| -rw-r--r-- | Documentation/driver-model/devres.txt | 1 | ||||
| -rw-r--r-- | drivers/base/devres.c | 21 | ||||
| -rw-r--r-- | include/linux/device.h | 2 |
3 files changed, 24 insertions, 0 deletions
diff --git a/Documentation/driver-model/devres.txt b/Documentation/driver-model/devres.txt index 4f7897e99cba..499951873997 100644 --- a/Documentation/driver-model/devres.txt +++ b/Documentation/driver-model/devres.txt @@ -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() diff --git a/drivers/base/devres.c b/drivers/base/devres.c index db4e264eecb6..d0914cba2413 100644 --- a/drivers/base/devres.c +++ b/drivers/base/devres.c @@ -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); diff --git a/include/linux/device.h b/include/linux/device.h index d1d1c055b48e..ab871588da89 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -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, |