some kmalloc/memset ->kzalloc (tree wide)

Transform some calls to kmalloc/memset to a single kzalloc (or kcalloc).

Here is a short excerpt of the semantic patch performing
this transformation:

@@
type T2;
expression x;
identifier f,fld;
expression E;
expression E1,E2;
expression e1,e2,e3,y;
statement S;
@@

 x =
- kmalloc
+ kzalloc
  (E1,E2)
  ...  when != \(x->fld=E;\|y=f(...,x,...);\|f(...,x,...);\|x=E;\|while(...) S\|for(e1;e2;e3) S\)
- memset((T2)x,0,E1);

@@
expression E1,E2,E3;
@@

- kzalloc(E1 * E2,E3)
+ kcalloc(E1,E2,E3)

[akpm@linux-foundation.org: get kcalloc args the right way around]
Signed-off-by: Yoann Padioleau <padator@wanadoo.fr>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Acked-by: Russell King <rmk@arm.linux.org.uk>
Cc: Bryan Wu <bryan.wu@analog.com>
Acked-by: Jiri Slaby <jirislaby@gmail.com>
Cc: Dave Airlie <airlied@linux.ie>
Acked-by: Roland Dreier <rolandd@cisco.com>
Cc: Jiri Kosina <jkosina@suse.cz>
Acked-by: Dmitry Torokhov <dtor@mail.ru>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Acked-by: Pierre Ossman <drzeus-list@drzeus.cx>
Cc: Jeff Garzik <jeff@garzik.org>
Cc: "David S. Miller" <davem@davemloft.net>
Acked-by: Greg KH <greg@kroah.com>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

4 files changed, 4 insertions, 8 deletions

diff --git a/drivers/usb/gadget/goku_udc.c b/drivers/usb/gadget/goku_udc.c
index d6c5f1150ae..349b8166f34 100644
--- a/drivers/usb/gadget/goku_udc.c
+++ b/drivers/usb/gadget/goku_udc.c
@@ -1777,14 +1777,13 @@ static int goku_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	}
 
 	/* alloc, and start init */
-	dev = kmalloc (sizeof *dev, GFP_KERNEL);
+	dev = kzalloc (sizeof *dev, GFP_KERNEL);
 	if (dev == NULL){
 		pr_debug("enomem %s\n", pci_name(pdev));
 		retval = -ENOMEM;
 		goto done;
 	}
 
-	memset(dev, 0, sizeof *dev);
 	spin_lock_init(&dev->lock);
 	dev->pdev = pdev;
 	dev->gadget.ops = &goku_ops;
diff --git a/drivers/usb/gadget/serial.c b/drivers/usb/gadget/serial.c
index dd33ff0ae4c..38138bb9ddb 100644
--- a/drivers/usb/gadget/serial.c
+++ b/drivers/usb/gadget/serial.c
@@ -1427,7 +1427,7 @@ static int __init gs_bind(struct usb_gadget *gadget)
 		gs_acm_config_desc.bmAttributes |= USB_CONFIG_ATT_WAKEUP;
 	}
 
-	gs_device = dev = kmalloc(sizeof(struct gs_dev), GFP_KERNEL);
+	gs_device = dev = kzalloc(sizeof(struct gs_dev), GFP_KERNEL);
 	if (dev == NULL)
 		return -ENOMEM;
 
@@ -1435,7 +1435,6 @@ static int __init gs_bind(struct usb_gadget *gadget)
 		init_utsname()->sysname, init_utsname()->release,
 		gadget->name);
 
-	memset(dev, 0, sizeof(struct gs_dev));
 	dev->dev_gadget = gadget;
 	spin_lock_init(&dev->dev_lock);
 	INIT_LIST_HEAD(&dev->dev_req_list);
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index 2038125b7f8..6edf4097d2d 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -171,11 +171,10 @@ static int ohci_urb_enqueue (
 	}
 
 	/* allocate the private part of the URB */
-	urb_priv = kmalloc (sizeof (urb_priv_t) + size * sizeof (struct td *),
+	urb_priv = kzalloc (sizeof (urb_priv_t) + size * sizeof (struct td *),
 			mem_flags);
 	if (!urb_priv)
 		return -ENOMEM;
-	memset (urb_priv, 0, sizeof (urb_priv_t) + size * sizeof (struct td *));
 	INIT_LIST_HEAD (&urb_priv->pending);
 	urb_priv->length = size;
 	urb_priv->ed = ed;
diff --git a/drivers/usb/host/sl811_cs.c b/drivers/usb/host/sl811_cs.c
index 2d0e73b2009..5da63f53500 100644
--- a/drivers/usb/host/sl811_cs.c
+++ b/drivers/usb/host/sl811_cs.c
@@ -278,10 +278,9 @@ static int sl811_cs_probe(struct pcmcia_device *link)
 {
 	local_info_t *local;
 
-	local = kmalloc(sizeof(local_info_t), GFP_KERNEL);
+	local = kzalloc(sizeof(local_info_t), GFP_KERNEL);
 	if (!local)
 		return -ENOMEM;
-	memset(local, 0, sizeof(local_info_t));
 	local->p_dev = link;
 	link->priv = local;