From e31108cad3deabb1a63111d7aa699ca67753c01f Mon Sep 17 00:00:00 2001 From: Manish Badarkhe Date: Wed, 29 Jan 2014 20:27:27 +0530 Subject: [PATCH] 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 Signed-off-by: Mark Brown --- drivers/base/devres.c | 26 ++++++++++++++++++++++++++ include/linux/device.h | 1 + 2 files changed, 27 insertions(+) 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 @@ -790,6 +790,32 @@ 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 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, -- 2.39.2