Prev: [PATCH 7/37] drivers/net/wireless/wl12xx: Use kmemdup
Next: [PATCH 3/37] drivers/misc/iwmc3200top/log.c: Use kmemdup
From: Julia Lawall on 15 May 2010 17:20
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/usb/gadget/atmel_usba_udc.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)

diff -u -p a/drivers/usb/gadget/atmel_usba_udc.c b/drivers/usb/gadget/atmel_usba_udc.c
--- a/drivers/usb/gadget/atmel_usba_udc.c
+++ b/drivers/usb/gadget/atmel_usba_udc.c
@@ -48,10 +48,9 @@ static int queue_dbg_open(struct inode *

spin_lock_irq(&ep->udc->lock);
list_for_each_entry(req, &ep->queue, queue) {
- req_copy = kmalloc(sizeof(*req_copy), GFP_ATOMIC);
+ req_copy = kmemdup(req, sizeof(*req_copy), GFP_ATOMIC);
if (!req_copy)
goto fail;
- memcpy(req_copy, req, sizeof(*req_copy));
list_add_tail(&req_copy->queue, queue_data);
}
spin_unlock_irq(&ep->udc->lock);
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo(a)vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
 | 
Pages: 1
Prev: [PATCH 7/37] drivers/net/wireless/wl12xx: Use kmemdup
Next: [PATCH 3/37] drivers/misc/iwmc3200top/log.c: Use kmemdup