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From: Julia Lawall on 15 May 2010 17:30
From: Julia Lawall <julia(a)diku.dk>

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(a)diku.dk>

---
drivers/net/wireless/orinoco/wext.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)

diff -u -p a/drivers/net/wireless/orinoco/wext.c b/drivers/net/wireless/orinoco/wext.c
--- a/drivers/net/wireless/orinoco/wext.c
+++ b/drivers/net/wireless/orinoco/wext.c
@@ -993,11 +993,9 @@ static int orinoco_ioctl_set_genie(struc
return -EINVAL;

if (wrqu->data.length) {
- buf = kmalloc(wrqu->data.length, GFP_KERNEL);
+ buf = kmemdup(extra, wrqu->data.length, GFP_KERNEL);
if (buf == NULL)
return -ENOMEM;
-
- memcpy(buf, extra, wrqu->data.length);
} else
buf = NULL;

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