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| author | Manish Badarkhe <badarkhe.manish@gmail.com> | 2014-01-29 15:57:27 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@linaro.org> | 2014-02-11 17:34:32 +0100 |
| commit | e31108cad3deabb1a63111d7aa699ca67753c01f (patch) | |
| tree | 064b0ddbd24537c667b4d308286d980770f83ac5 | |
| parent | Linus 3.14-rc1 (diff) | |
| download | linux-e31108cad3deabb1a63111d7aa699ca67753c01f.tar.xz linux-e31108cad3deabb1a63111d7aa699ca67753c01f.zip | |
devres: introduce API "devm_kstrdup"
This patch introduces "devm_kstrdup" API so that the
device's driver can allocate memory and copy string.
Signed-off-by: Manish Badarkhe <badarkhe.manish@gmail.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
| -rw-r--r-- | drivers/base/devres.c | 26 | ||||
| -rw-r--r-- | include/linux/device.h | 1 |
2 files changed, 27 insertions, 0 deletions
diff --git a/drivers/base/devres.c b/drivers/base/devres.c index 545c4de412c3..db4e264eecb6 100644 --- a/drivers/base/devres.c +++ b/drivers/base/devres.c @@ -791,6 +791,32 @@ void * devm_kmalloc(struct device *dev, size_t size, gfp_t gfp) EXPORT_SYMBOL_GPL(devm_kmalloc); /** + * devm_kstrdup - Allocate resource managed space and + * copy an existing string into that. + * @dev: Device to allocate memory for + * @s: the string to duplicate + * @gfp: the GFP mask used in the devm_kmalloc() call when + * allocating memory + * RETURNS: + * Pointer to allocated string on success, NULL on failure. + */ +char *devm_kstrdup(struct device *dev, const char *s, gfp_t gfp) +{ + size_t size; + char *buf; + + if (!s) + return NULL; + + size = strlen(s) + 1; + buf = devm_kmalloc(dev, size, gfp); + if (buf) + memcpy(buf, s, size); + return buf; +} +EXPORT_SYMBOL_GPL(devm_kstrdup); + +/** * devm_kfree - Resource-managed kfree * @dev: Device this memory belongs to * @p: Memory to free diff --git a/include/linux/device.h b/include/linux/device.h index 952b01033c32..ec1b6e21f0ef 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -626,6 +626,7 @@ static inline void *devm_kcalloc(struct device *dev, return devm_kmalloc_array(dev, n, size, flags | __GFP_ZERO); } extern void devm_kfree(struct device *dev, void *p); +extern char *devm_kstrdup(struct device *dev, const char *s, gfp_t gfp); void __iomem *devm_ioremap_resource(struct device *dev, struct resource *res); void __iomem *devm_request_and_ioremap(struct device *dev, |