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>

5 files changed, 5 insertions, 10 deletions

diff --git a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4_compat.c b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4_compat.c
index 3da9d73..27c7918 100644
--- a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4_compat.c
+++ b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4_compat.c
@@ -177,7 +177,7 @@ static int ct_open(struct inode *inode, struct file *file)
 	struct ct_iter_state *st;
 	int ret;
 
-	st = kmalloc(sizeof(struct ct_iter_state), GFP_KERNEL);
+	st = kzalloc(sizeof(struct ct_iter_state), GFP_KERNEL);
 	if (st == NULL)
 		return -ENOMEM;
 	ret = seq_open(file, &ct_seq_ops);
@@ -185,7 +185,6 @@ static int ct_open(struct inode *inode, struct file *file)
 		goto out_free;
 	seq          = file->private_data;
 	seq->private = st;
-	memset(st, 0, sizeof(struct ct_iter_state));
 	return ret;
 out_free:
 	kfree(st);
diff --git a/net/mac80211/ieee80211_rate.c b/net/mac80211/ieee80211_rate.c
index 16e8508..2118de0 100644
--- a/net/mac80211/ieee80211_rate.c
+++ b/net/mac80211/ieee80211_rate.c
@@ -24,11 +24,10 @@ int ieee80211_rate_control_register(struct rate_control_ops *ops)
 {
 	struct rate_control_alg *alg;
 
-	alg = kmalloc(sizeof(*alg), GFP_KERNEL);
+	alg = kzalloc(sizeof(*alg), GFP_KERNEL);
 	if (alg == NULL) {
 		return -ENOMEM;
 	}
-	memset(alg, 0, sizeof(*alg));
 	alg->ops = ops;
 
 	mutex_lock(&rate_ctrl_mutex);
diff --git a/net/mac80211/ieee80211_sta.c b/net/mac80211/ieee80211_sta.c
index ba2bf8f..22b1178 100644
--- a/net/mac80211/ieee80211_sta.c
+++ b/net/mac80211/ieee80211_sta.c
@@ -1327,10 +1327,9 @@ ieee80211_rx_bss_add(struct net_device *dev, u8 *bssid)
 	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);
 	struct ieee80211_sta_bss *bss;
 
-	bss = kmalloc(sizeof(*bss), GFP_ATOMIC);
+	bss = kzalloc(sizeof(*bss), GFP_ATOMIC);
 	if (!bss)
 		return NULL;
-	memset(bss, 0, sizeof(*bss));
 	atomic_inc(&bss->users);
 	atomic_inc(&bss->users);
 	memcpy(bss->bssid, bssid, ETH_ALEN);
diff --git a/net/netfilter/nf_conntrack_standalone.c b/net/netfilter/nf_conntrack_standalone.c
index ffb6ff8..fc847cc 100644
--- a/net/netfilter/nf_conntrack_standalone.c
+++ b/net/netfilter/nf_conntrack_standalone.c
@@ -198,7 +198,7 @@ static int ct_open(struct inode *inode, struct file *file)
 	struct ct_iter_state *st;
 	int ret;
 
-	st = kmalloc(sizeof(struct ct_iter_state), GFP_KERNEL);
+	st = kzalloc(sizeof(struct ct_iter_state), GFP_KERNEL);
 	if (st == NULL)
 		return -ENOMEM;
 	ret = seq_open(file, &ct_seq_ops);
@@ -206,7 +206,6 @@ static int ct_open(struct inode *inode, struct file *file)
 		goto out_free;
 	seq          = file->private_data;
 	seq->private = st;
-	memset(st, 0, sizeof(struct ct_iter_state));
 	return ret;
 out_free:
 	kfree(st);
diff --git a/net/tipc/name_table.c b/net/tipc/name_table.c
index 9dfc912..d8473ee 100644
--- a/net/tipc/name_table.c
+++ b/net/tipc/name_table.c
@@ -1052,12 +1052,11 @@ int tipc_nametbl_init(void)
 {
 	int array_size = sizeof(struct hlist_head) * tipc_nametbl_size;
 
-	table.types = kmalloc(array_size, GFP_ATOMIC);
+	table.types = kzalloc(array_size, GFP_ATOMIC);
 	if (!table.types)
 		return -ENOMEM;
 
 	write_lock_bh(&tipc_nametbl_lock);
-	memset(table.types, 0, array_size);
 	table.local_publ_count = 0;
 	write_unlock_bh(&tipc_nametbl_lock);
 	return 0;