This patch introduces "devm_kstrdup" API so that the
device's driver can allocate memory and copy string.
Signed-off-by: Manish Badarkhe <badarkhe.man...@gmail.com>
---
:100644 100644 545c4de... 6e88a3d... M drivers/base/devres.c
:100644 100644 952b010... 8fee649... M include/linux/device.h
drivers/base/devres.c | 26 ++++++++++++++++++++++++++
include/linux/device.h | 2 ++
2 files changed, 28 insertions(+)
diff --git a/drivers/base/devres.c b/drivers/base/devres.c
index 545c4de..6e88a3d 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
+ * and copy an existing string
+ * @dev: Device to allocate memory for
+ * @s: the string to duplicate
+ * @size: Allocation size
+ * @gfp: the GFP mask used in the devm_kzalloc() call when
+ * allocating memory
+ * RETURNS:
+ * Pointer to allocated string on success, NULL on failure.
+ */
+char *devm_kstrdup(struct device *dev,
+ const char *s, size_t size, gfp_t gfp)
+{
+ char *buf;
+
+ if (!s)
+ return NULL;
+
+ buf = devm_kzalloc(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 952b010..8fee649 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -626,6 +626,8 @@ 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, size_t size,
+ gfp_t gfp);
void __iomem *devm_ioremap_resource(struct device *dev, struct resource *res);
void __iomem *devm_request_and_ioremap(struct device *dev,
--
1.7.10.4
--
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