drivers/gpu/drm: Use kzalloc

Use kzalloc rather than the combination of kmalloc and memset.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression x,size,flags;
statement S;
@@

-x = kmalloc(size,flags);
+x = kzalloc(size,flags);
 if (x == NULL) S
-memset(x, 0, size);
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Reviewed-by: Corbin Simpson <MostAwesomeDude@gmail.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

4 files changed, 4 insertions, 9 deletions

diff --git a/drivers/gpu/drm/drm_auth.c b/drivers/gpu/drm/drm_auth.c
index 932b5aa96a67..3f46772f0cb2 100644
--- a/drivers/gpu/drm/drm_auth.c
+++ b/drivers/gpu/drm/drm_auth.c
@@ -79,10 +79,9 @@ static int drm_add_magic(struct drm_master *master, struct drm_file *priv,
         struct drm_device *dev = master->minor->dev;
         DRM_DEBUG("%d\n", magic);
 
-        entry = kmalloc(sizeof(*entry), GFP_KERNEL);
+        entry = kzalloc(sizeof(*entry), GFP_KERNEL);
         if (!entry)
                 return -ENOMEM;
-        memset(entry, 0, sizeof(*entry));
         entry->priv = priv;
         entry->hash_item.key = (unsigned long)magic;
         mutex_lock(&dev->struct_mutex);
diff --git a/drivers/gpu/drm/drm_dma.c b/drivers/gpu/drm/drm_dma.c
index 13f1537413fb..252cbd74df0e 100644
--- a/drivers/gpu/drm/drm_dma.c
+++ b/drivers/gpu/drm/drm_dma.c
@@ -47,12 +47,10 @@ int drm_dma_setup(struct drm_device *dev)
 {
         int i;
 
-        dev->dma = kmalloc(sizeof(*dev->dma), GFP_KERNEL);
+        dev->dma = kzalloc(sizeof(*dev->dma), GFP_KERNEL);
         if (!dev->dma)
                 return -ENOMEM;
 
-        memset(dev->dma, 0, sizeof(*dev->dma));
-
         for (i = 0; i <= DRM_MAX_ORDER; i++)
                 memset(&dev->dma->bufs[i], 0, sizeof(dev->dma->bufs[0]));
 
diff --git a/drivers/gpu/drm/drm_fops.c b/drivers/gpu/drm/drm_fops.c
index 9d532d7fdf59..e7aace20981f 100644
--- a/drivers/gpu/drm/drm_fops.c
+++ b/drivers/gpu/drm/drm_fops.c
@@ -243,11 +243,10 @@ static int drm_open_helper(struct inode *inode, struct file *filp,
 
         DRM_DEBUG("pid = %d, minor = %d\n", task_pid_nr(current), minor_id);
 
-        priv = kmalloc(sizeof(*priv), GFP_KERNEL);
+        priv = kzalloc(sizeof(*priv), GFP_KERNEL);
         if (!priv)
                 return -ENOMEM;
 
-        memset(priv, 0, sizeof(*priv));
         filp->private_data = priv;
         priv->filp = filp;
         priv->uid = current_euid();
diff --git a/drivers/gpu/drm/savage/savage_bci.c b/drivers/gpu/drm/savage/savage_bci.c
index bff6fc2524c8..2d0c9ca484c5 100644
--- a/drivers/gpu/drm/savage/savage_bci.c
+++ b/drivers/gpu/drm/savage/savage_bci.c
@@ -539,11 +539,10 @@ int savage_driver_load(struct drm_device *dev, unsigned long chipset)
 {
         drm_savage_private_t *dev_priv;
 
-        dev_priv = kmalloc(sizeof(drm_savage_private_t), GFP_KERNEL);
+        dev_priv = kzalloc(sizeof(drm_savage_private_t), GFP_KERNEL);
         if (dev_priv == NULL)
                 return -ENOMEM;
 
-        memset(dev_priv, 0, sizeof(drm_savage_private_t));
         dev->dev_private = (void *)dev_priv;
 
         dev_priv->chipset = (enum savage_family)chipset;