ppp: replace kmalloc+memset with kzalloc

diff -rubp linux-2.6.19-rc5_orig/drivers/net/ppp_async.c linux-2.6.19-rc5_kzalloc/drivers/net/ppp_async.c
@@ -159,12 +159,11 @@ ppp_asynctty_open(struct tty_struct *tty
 	int err;
 
 	err = -ENOMEM;
-	ap = kmalloc(sizeof(*ap), GFP_KERNEL);
+	ap = kzalloc(sizeof(*ap), GFP_KERNEL);
 	if (ap == 0)
 		goto out;
 
 	/* initialize the asyncppp structure */
-	memset(ap, 0, sizeof(*ap));
 	ap->tty = tty;
 	ap->mru = PPP_MRU;
 	spin_lock_init(&ap->xmit_lock);

diff -rubp linux-2.6.19-rc5_orig/drivers/net/ppp_deflate.c linux-2.6.19-rc5_kzalloc/drivers/net/ppp_deflate.c
@@ -121,12 +121,11 @@ static void *z_comp_alloc(unsigned char 
 	if (w_size < DEFLATE_MIN_SIZE || w_size > DEFLATE_MAX_SIZE)
 		return NULL;
 
-	state = (struct ppp_deflate_state *) kmalloc(sizeof(*state),
-							GFP_KERNEL);
+	state = kzalloc(sizeof(*state), GFP_KERNEL);
 	if (state == NULL)
 		return NULL;
 
-	memset (state, 0, sizeof (struct ppp_deflate_state));
 	state->strm.next_in   = NULL;
 	state->w_size         = w_size;
 	state->strm.workspace = vmalloc(zlib_deflate_workspacesize());

@@ -341,11 +340,10 @@ static void *z_decomp_alloc(unsigned cha
 	if (w_size < DEFLATE_MIN_SIZE || w_size > DEFLATE_MAX_SIZE)
 		return NULL;
 
-	state = (struct ppp_deflate_state *) kmalloc(sizeof(*state), GFP_KERNEL);
+	state = kzalloc(sizeof(*state), GFP_KERNEL);
 	if (state == NULL)
 		return NULL;
 
-	memset (state, 0, sizeof (struct ppp_deflate_state));
 	state->w_size         = w_size;
 	state->strm.next_out  = NULL;
 	state->strm.workspace = kmalloc(zlib_inflate_workspacesize(),

diff -rubp linux-2.6.19-rc5_orig/drivers/net/ppp_mppe.c linux-2.6.19-rc5_kzalloc/drivers/net/ppp_mppe.c
@@ -200,12 +200,10 @@ static void *mppe_alloc(unsigned char *o
 	    || options[0] != CI_MPPE || options[1] != CILEN_MPPE)
 		goto out;
 
-	state = (struct ppp_mppe_state *) kmalloc(sizeof(*state), GFP_KERNEL);
+	state = kzalloc(sizeof(*state), GFP_KERNEL);
 	if (state == NULL)
 		goto out;
 
-	memset(state, 0, sizeof(*state));
-
 	state->arc4 = crypto_alloc_blkcipher("ecb(arc4)", 0, CRYPTO_ALG_ASYNC);
 	if (IS_ERR(state->arc4)) {
 		state->arc4 = NULL;

diff -rubp linux-2.6.19-rc5_orig/drivers/net/ppp_synctty.c linux-2.6.19-rc5_kzalloc/drivers/net/ppp_synctty.c
@@ -207,13 +207,12 @@ ppp_sync_open(struct tty_struct *tty)
 	struct syncppp *ap;
 	int err;
 
-	ap = kmalloc(sizeof(*ap), GFP_KERNEL);
+	ap = kzalloc(sizeof(*ap), GFP_KERNEL);
 	err = -ENOMEM;
 	if (ap == 0)
 		goto out;
 
 	/* initialize the syncppp structure */
-	memset(ap, 0, sizeof(*ap));
 	ap->tty = tty;
 	ap->mru = PPP_MRU;
 	spin_lock_init(&ap->xmit_lock);