From e31108cad3deabb1a63111d7aa699ca67753c01f Mon Sep 17 00:00:00 2001
From: Manish Badarkhe <badarkhe.manish@gmail.com>
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 <badarkhe.manish@gmail.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
---
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 545c4de412c3e..db4e264eecb60 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 952b01033c32d..ec1b6e21f0efb 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,
--
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