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/w1/masters/matrox_w1.c b/drivers/w1/masters/matrox_w1.c
index 6f9d880ab2e..d356da5709f 100644
--- a/drivers/w1/masters/matrox_w1.c
+++ b/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);
 
diff --git a/drivers/w1/slaves/w1_ds2433.c b/drivers/w1/slaves/w1_ds2433.c
index cab56005dd4..858c16a544c 100644
--- a/drivers/w1/slaves/w1_ds2433.c
+++ b/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 */
diff --git a/drivers/w1/w1.c b/drivers/w1/w1.c
index c6332108f1c..8d7ab74170d 100644
--- a/drivers/w1/w1.c
+++ b/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;
diff --git a/drivers/w1/w1_int.c b/drivers/w1/w1_int.c
index 258defdb2ef..2fbd8dd16df 100644
--- a/drivers/w1/w1_int.c
+++ b/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);