[PATCH V2 1/3] base: Add block copy func. for managed devices

From: Rob Jones
Date: Wed Jul 02 2014 - 06:07:42 EST


Add function devm_kmemdup() which is exactly analogous to the
non-managed device function kmemdup().

Reviewed-by: Ian Molton <ian.molton@xxxxxxxxxxxxxxx>
Signed-off-by: Rob Jones <rob.jones@xxxxxxxxxxxxxxx>
---
drivers/base/devres.c | 25 +++++++++++++++++++++++++
include/linux/device.h | 2 ++
2 files changed, 27 insertions(+)

diff --git a/drivers/base/devres.c b/drivers/base/devres.c
index db4e264..77a6ce7 100644
--- a/drivers/base/devres.c
+++ b/drivers/base/devres.c
@@ -817,6 +817,31 @@ char *devm_kstrdup(struct device *dev, const char *s, gfp_t gfp)
EXPORT_SYMBOL_GPL(devm_kstrdup);

/**
+ * devm_kmemdup - Allocate resource managed space and
+ * copy existing data into that.
+ * @dev: Device to allocate memory for
+ * @s: The memory block 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.
+ */
+void *devm_kmemdup(struct device *dev, const void *s, size_t size, gfp_t gfp)
+{
+ void *buf;
+
+ if (!s || (size == 0))
+ return NULL;
+
+ buf = devm_kmalloc(dev, size, gfp);
+ if (buf)
+ memcpy(buf, s, size);
+
+ return buf;
+}
+EXPORT_SYMBOL_GPL(devm_kmemdup);
+
+/**
* 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 d1d1c05..7ace116 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 *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

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/