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-rw-r--r--mm/util.c39
1 files changed, 39 insertions, 0 deletions
diff --git a/mm/util.c b/mm/util.c
new file mode 100644
index 000000000000..5f4bb59da63c
--- /dev/null
+++ b/mm/util.c
@@ -0,0 +1,39 @@
1#include <linux/slab.h>
2#include <linux/string.h>
3#include <linux/module.h>
4
5/**
6 * kzalloc - allocate memory. The memory is set to zero.
7 * @size: how many bytes of memory are required.
8 * @flags: the type of memory to allocate.
9 */
10void *kzalloc(size_t size, gfp_t flags)
11{
12 void *ret = kmalloc(size, flags);
13 if (ret)
14 memset(ret, 0, size);
15 return ret;
16}
17EXPORT_SYMBOL(kzalloc);
18
19/*
20 * kstrdup - allocate space for and copy an existing string
21 *
22 * @s: the string to duplicate
23 * @gfp: the GFP mask used in the kmalloc() call when allocating memory
24 */
25char *kstrdup(const char *s, gfp_t gfp)
26{
27 size_t len;
28 char *buf;
29
30 if (!s)
31 return NULL;
32
33 len = strlen(s) + 1;
34 buf = kmalloc(len, gfp);
35 if (buf)
36 memcpy(buf, s, len);
37 return buf;
38}
39EXPORT_SYMBOL(kstrdup);