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>

2 files changed, 4 insertions, 8 deletions

diff --git a/drivers/s390/char/tape_34xx.c b/drivers/s390/char/tape_34xx.c
index e765875e8db2..80e7a537e7d2 100644
--- a/drivers/s390/char/tape_34xx.c
+++ b/drivers/s390/char/tape_34xx.c
@@ -131,10 +131,9 @@ tape_34xx_schedule_work(struct tape_device *device, enum tape_op op)
 {
         struct tape_34xx_work *p;
 
-        if ((p = kmalloc(sizeof(*p), GFP_ATOMIC)) == NULL)
+        if ((p = kzalloc(sizeof(*p), GFP_ATOMIC)) == NULL)
                 return -ENOMEM;
 
-        memset(p, 0, sizeof(*p));
         INIT_WORK(&p->work, tape_34xx_work_handler);
 
         p->device = tape_get_device_reference(device);
diff --git a/drivers/s390/net/claw.c b/drivers/s390/net/claw.c
index 348bb7b82771..023455a0b34a 100644
--- a/drivers/s390/net/claw.c
+++ b/drivers/s390/net/claw.c
@@ -317,8 +317,8 @@ claw_probe(struct ccwgroup_device *cgdev)
                 CLAW_DBF_TEXT_(2,setup,"probex%d",-ENOMEM);
                 return -ENOMEM;
         }
-        privptr->p_mtc_envelope= kmalloc( MAX_ENVELOPE_SIZE, GFP_KERNEL);
-        privptr->p_env = kmalloc(sizeof(struct claw_env), GFP_KERNEL);
+        privptr->p_mtc_envelope= kzalloc( MAX_ENVELOPE_SIZE, GFP_KERNEL);
+        privptr->p_env = kzalloc(sizeof(struct claw_env), GFP_KERNEL);
         if ((privptr->p_mtc_envelope==NULL) || (privptr->p_env==NULL)) {
                 probe_error(cgdev);
                 put_device(&cgdev->dev);
@@ -327,8 +327,6 @@ claw_probe(struct ccwgroup_device *cgdev)
                 CLAW_DBF_TEXT_(2,setup,"probex%d",-ENOMEM);
                 return -ENOMEM;
         }
-        memset(privptr->p_mtc_envelope, 0x00, MAX_ENVELOPE_SIZE);
-        memset(privptr->p_env, 0x00, sizeof(struct claw_env));
         memcpy(privptr->p_env->adapter_name,WS_NAME_NOT_DEF,8);
         memcpy(privptr->p_env->host_name,WS_NAME_NOT_DEF,8);
         memcpy(privptr->p_env->api_type,WS_NAME_NOT_DEF,8);
@@ -3924,7 +3922,7 @@ add_channel(struct ccw_device *cdev,int i,struct claw_privbk *privptr)
         snprintf(p_ch->id, CLAW_ID_SIZE, "cl-%s", cdev->dev.bus_id);
         ccw_device_get_id(cdev, &dev_id);
         p_ch->devno = dev_id.devno;
-        if ((p_ch->irb = kmalloc(sizeof (struct irb),GFP_KERNEL)) == NULL) {
+        if ((p_ch->irb = kzalloc(sizeof (struct irb),GFP_KERNEL)) == NULL) {
                 printk(KERN_WARNING "%s Out of memory in %s for irb\n",
                         p_ch->id,__FUNCTION__);
 #ifdef FUNCTRACE
@@ -3933,7 +3931,6 @@ add_channel(struct ccw_device *cdev,int i,struct claw_privbk *privptr)
 #endif
                 return -ENOMEM;
         }
-        memset(p_ch->irb, 0, sizeof (struct irb));
 #ifdef FUNCTRACE
                 printk(KERN_INFO "%s:%s Exit on line %d\n",
                         cdev->dev.bus_id,__FUNCTION__,__LINE__);