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authorManish Badarkhe <badarkhe.manish@gmail.com>2014-01-29 09:57:27 -0500
committerMark Brown <broonie@linaro.org>2014-02-11 11:34:32 -0500
commite31108cad3deabb1a63111d7aa699ca67753c01f (patch)
tree064b0ddbd24537c667b4d308286d980770f83ac5 /drivers
parent38dbfb59d1175ef458d006556061adeaa8751b72 (diff)
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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/base/devres.c26
1 files changed, 26 insertions, 0 deletions
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
@@ -791,6 +791,32 @@ void * devm_kmalloc(struct device *dev, size_t size, gfp_t gfp)
791EXPORT_SYMBOL_GPL(devm_kmalloc); 791EXPORT_SYMBOL_GPL(devm_kmalloc);
792 792
793/** 793/**
794 * devm_kstrdup - Allocate resource managed space and
795 * copy an existing string into that.
796 * @dev: Device to allocate memory for
797 * @s: the string to duplicate
798 * @gfp: the GFP mask used in the devm_kmalloc() call when
799 * allocating memory
800 * RETURNS:
801 * Pointer to allocated string on success, NULL on failure.
802 */
803char *devm_kstrdup(struct device *dev, const char *s, gfp_t gfp)
804{
805 size_t size;
806 char *buf;
807
808 if (!s)
809 return NULL;
810
811 size = strlen(s) + 1;
812 buf = devm_kmalloc(dev, size, gfp);
813 if (buf)
814 memcpy(buf, s, size);
815 return buf;
816}
817EXPORT_SYMBOL_GPL(devm_kstrdup);
818
819/**
794 * devm_kfree - Resource-managed kfree 820 * devm_kfree - Resource-managed kfree
795 * @dev: Device this memory belongs to 821 * @dev: Device this memory belongs to
796 * @p: Memory to free 822 * @p: Memory to free