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)

[[email protected]: get kcalloc args the right way around]
Signed-off-by: Yoann Padioleau <[email protected]>
Cc: Richard Henderson <[email protected]>
Cc: Ivan Kokshaysky <[email protected]>
Acked-by: Russell King <[email protected]>
Cc: Bryan Wu <[email protected]>
Acked-by: Jiri Slaby <[email protected]>
Cc: Dave Airlie <[email protected]>
Acked-by: Roland Dreier <[email protected]>
Cc: Jiri Kosina <[email protected]>
Acked-by: Dmitry Torokhov <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Acked-by: Mauro Carvalho Chehab <[email protected]>
Acked-by: Pierre Ossman <[email protected]>
Cc: Jeff Garzik <[email protected]>
Cc: "David S. Miller" <[email protected]>
Acked-by: Greg KH <[email protected]>
Cc: James Bottomley <[email protected]>
Cc: "Antonino A. Daplas" <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

drivers/w1/masters/matrox_w1.c

@@ -164,7 +164,7 @@ static int __devinit matrox_w1_probe(struct pci_dev *pdev, const struct pci_devi
 	if (pdev->vendor != PCI_VENDOR_ID_MATROX || pdev->device != PCI_DEVICE_ID_MATROX_G400)
 		return -ENODEV;
 
-	dev = kmalloc(sizeof(struct matrox_device) +
+	dev = kzalloc(sizeof(struct matrox_device) +
 		       sizeof(struct w1_bus_master), GFP_KERNEL);
 	if (!dev) {
 		dev_err(&pdev->dev,
@@ -173,7 +173,6 @@ static int __devinit matrox_w1_probe(struct pci_dev *pdev, const struct pci_devi
 		return -ENOMEM;
 	}
 
-	memset(dev, 0, sizeof(struct matrox_device) + sizeof(struct w1_bus_master));
 
 	dev->bus_master = (struct w1_bus_master *)(dev + 1);
 

drivers/w1/slaves/w1_ds2433.c

@@ -266,10 +266,9 @@ static int w1_f23_add_slave(struct w1_slave *sl)
 #ifdef CONFIG_W1_SLAVE_DS2433_CRC
 	struct w1_f23_data *data;
 
-	data = kmalloc(sizeof(struct w1_f23_data), GFP_KERNEL);
+	data = kzalloc(sizeof(struct w1_f23_data), GFP_KERNEL);
 	if (!data)
 		return -ENOMEM;
-	memset(data, 0, sizeof(struct w1_f23_data));
 	sl->family_data = data;
 
 #endif	/* CONFIG_W1_SLAVE_DS2433_CRC */

drivers/w1/w1.c

@@ -520,7 +520,7 @@ static int w1_attach_slave_device(struct w1_master *dev, struct w1_reg_num *rn)
 	int err;
 	struct w1_netlink_msg msg;
 
-	sl = kmalloc(sizeof(struct w1_slave), GFP_KERNEL);
+	sl = kzalloc(sizeof(struct w1_slave), GFP_KERNEL);
 	if (!sl) {
 		dev_err(&dev->dev,
 			 "%s: failed to allocate new slave device.\n",
@@ -528,7 +528,6 @@ static int w1_attach_slave_device(struct w1_master *dev, struct w1_reg_num *rn)
 		return -ENOMEM;
 	}
 
-	memset(sl, 0, sizeof(*sl));
 
 	sl->owner = THIS_MODULE;
 	sl->master = dev;

drivers/w1/w1_int.c

@@ -41,7 +41,7 @@ static struct w1_master * w1_alloc_dev(u32 id, int slave_count, int slave_ttl,
 	/*
 	 * We are in process context(kernel thread), so can sleep.
 	 */
-	dev = kmalloc(sizeof(struct w1_master) + sizeof(struct w1_bus_master), GFP_KERNEL);
+	dev = kzalloc(sizeof(struct w1_master) + sizeof(struct w1_bus_master), GFP_KERNEL);
 	if (!dev) {
 		printk(KERN_ERR
 			"Failed to allocate %zd bytes for new w1 device.\n",
@@ -49,7 +49,6 @@ static struct w1_master * w1_alloc_dev(u32 id, int slave_count, int slave_ttl,
 		return NULL;
 	}
 
-	memset(dev, 0, sizeof(struct w1_master) + sizeof(struct w1_bus_master));
 
 	dev->bus_master = (struct w1_bus_master *)(dev + 1);