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>

drivers/net/hamradio/dmascc.c

@@ -453,8 +453,8 @@ static int __init setup_adapter(int card_base, int type, int n)
 	int scc_base = card_base + hw[type].scc_offset;
 	char *chipnames[] = CHIPNAMES;
 
-	/* Allocate memory */
-	info = kmalloc(sizeof(struct scc_info), GFP_KERNEL | GFP_DMA);
+	/* Initialize what is necessary for write_scc and write_scc_data */
+	info = kzalloc(sizeof(struct scc_info), GFP_KERNEL | GFP_DMA);
 	if (!info) {
 		printk(KERN_ERR "dmascc: "
 		       "could not allocate memory for %s at %#3x\n",
@@ -462,8 +462,6 @@ static int __init setup_adapter(int card_base, int type, int n)
 		goto out;
 	}
 
-	/* Initialize what is necessary for write_scc and write_scc_data */
-	memset(info, 0, sizeof(struct scc_info));
 
 	info->dev[0] = alloc_netdev(0, "", dev_setup);
 	if (!info->dev[0]) {