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authorKartik <kkartik@nvidia.com>2023-10-17 07:23:15 +0200
committerThierry Reding <treding@nvidia.com>2024-02-01 15:58:05 +0100
commit7092e9b3bed1252c7d3f5812b9fb9d82375b73a6 (patch)
treef394199a150ef9400a8967586a481d87e4e14768 /mm/util.c
parentsoc/tegra: pmc: Remove some old and deprecated functions and constants (diff)
downloadlinux-7092e9b3bed1252c7d3f5812b9fb9d82375b73a6.tar.xz
linux-7092e9b3bed1252c7d3f5812b9fb9d82375b73a6.zip
mm/util: Introduce kmemdup_array()
Introduce kmemdup_array() API to duplicate `n` number of elements from a given array. This internally uses kmemdup to allocate and duplicate the `src` array. Signed-off-by: Kartik <kkartik@nvidia.com> Acked-by: Kees Cook <keescook@chromium.org> Signed-off-by: Thierry Reding <treding@nvidia.com>
Diffstat (limited to 'mm/util.c')
-rw-r--r--mm/util.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/mm/util.c b/mm/util.c
index 5a6a9802583b..5faf3adc6f43 100644
--- a/mm/util.c
+++ b/mm/util.c
@@ -136,6 +136,23 @@ void *kmemdup(const void *src, size_t len, gfp_t gfp)
EXPORT_SYMBOL(kmemdup);
/**
+ * kmemdup_array - duplicate a given array.
+ *
+ * @src: array to duplicate.
+ * @element_size: size of each element of array.
+ * @count: number of elements to duplicate from array.
+ * @gfp: GFP mask to use.
+ *
+ * Return: duplicated array of @src or %NULL in case of error,
+ * result is physically contiguous. Use kfree() to free.
+ */
+void *kmemdup_array(const void *src, size_t element_size, size_t count, gfp_t gfp)
+{
+ return kmemdup(src, size_mul(element_size, count), gfp);
+}
+EXPORT_SYMBOL(kmemdup_array);
+
+/**
* kvmemdup - duplicate region of memory
*
* @src: memory region to duplicate