drivers/mtd: Use kmemdup

Use kmemdup when some other buffer is immediately copied into the
allocated region.

A simplified version of the semantic patch that makes this change is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@@
expression from,to,size,flag;
statement S;
@@

-  to = \(kmalloc\|kzalloc\)(size,flag);
+  to = kmemdup(from,size,flag);
   if (to==NULL || ...) S
-  memcpy(to, from, size);
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

diff --git a/drivers/mtd/mtdconcat.c b/drivers/mtd/mtdconcat.c
index db6de74..7e07562 100644 (file)
--- a/drivers/mtd/mtdconcat.c
+++ b/drivers/mtd/mtdconcat.c
@@ -183,10 +183,9 @@ concat_writev(struct mtd_info *mtd, const struct kvec *vecs,
        }
 
        /* make a copy of vecs */
-       vecs_copy = kmalloc(sizeof(struct kvec) * count, GFP_KERNEL);
+       vecs_copy = kmemdup(vecs, sizeof(struct kvec) * count, GFP_KERNEL);
        if (!vecs_copy)
                return -ENOMEM;
-       memcpy(vecs_copy, vecs, sizeof(struct kvec) * count);
 
        entry_low = 0;
        for (i = 0; i < concat->num_subdev; i++) {