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authorSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>2014-04-29 03:51:00 +0400
committerJonathan Cameron <jic23@kernel.org>2014-04-30 00:58:15 +0400
commit3046365bb470f0ec2f7cf5cb07a8ee7e4b490103 (patch)
tree66fbbb9b115c71814ff5a6e36566a47c492f0a6a
parent37aa48368f2508defb1976be62e1ed6ca4dde683 (diff)
downloadlinux-3046365bb470f0ec2f7cf5cb07a8ee7e4b490103.tar.xz
devres: introduce API "devm_kmemdup
Introduce devm_kmemdup, which uses resource managed kmalloc. There are several request from maintainers to add this instead of using kmemdup. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
-rw-r--r--Documentation/driver-model/devres.txt1
-rw-r--r--drivers/base/devres.c21
-rw-r--r--include/linux/device.h2
3 files changed, 24 insertions, 0 deletions
diff --git a/Documentation/driver-model/devres.txt b/Documentation/driver-model/devres.txt
index 4f7897e99cba..499951873997 100644
--- a/Documentation/driver-model/devres.txt
+++ b/Documentation/driver-model/devres.txt
@@ -236,6 +236,7 @@ certainly invest a bit more effort into libata core layer).
MEM
devm_kzalloc()
devm_kfree()
+ devm_kmemdup()
IIO
devm_iio_device_alloc()
diff --git a/drivers/base/devres.c b/drivers/base/devres.c
index db4e264eecb6..d0914cba2413 100644
--- a/drivers/base/devres.c
+++ b/drivers/base/devres.c
@@ -831,3 +831,24 @@ void devm_kfree(struct device *dev, void *p)
WARN_ON(rc);
}
EXPORT_SYMBOL_GPL(devm_kfree);
+
+/**
+ * devm_kmemdup - Resource-managed kmemdup
+ * @dev: Device this memory belongs to
+ * @src: Memory region to duplicate
+ * @len: Memory region length
+ * @gfp: GFP mask to use
+ *
+ * Duplicate region of a memory using resource managed kmalloc
+ */
+void *devm_kmemdup(struct device *dev, const void *src, size_t len, gfp_t gfp)
+{
+ void *p;
+
+ p = devm_kmalloc(dev, len, gfp);
+ if (p)
+ memcpy(p, src, len);
+
+ return p;
+}
+EXPORT_SYMBOL_GPL(devm_kmemdup);
diff --git a/include/linux/device.h b/include/linux/device.h
index d1d1c055b48e..ab871588da89 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 *src, size_t len,
+ gfp_t gfp);
void __iomem *devm_ioremap_resource(struct device *dev, struct resource *res);
void __iomem *devm_request_and_ioremap(struct device *dev,