DRM: Replace kmalloc/memset combos with kzalloc

Currently most, if not all, memory allocation in drm_bufs.c is followed by initializing the memory with 0.

Replace the use of kmalloc+memset with kzalloc.

Signed-off-by: Davidlohr Bueso <dave@gnu.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/drivers/gpu/drm/drm_bufs.c b/drivers/gpu/drm/drm_bufs.c
index a5c9ce93bbcba1cf4d7390cfa3f7fe1c1e504078..3e257a50bf56f447563318d86bff3f6b2650c517 100644 (file)
--- a/drivers/gpu/drm/drm_bufs.c
+++ b/drivers/gpu/drm/drm_bufs.c
@@ -328,14 +328,13 @@ static int drm_addmap_core(struct drm_device * dev, resource_size_t offset,
                return -EINVAL;
        }
 
-       list = kmalloc(sizeof(*list), GFP_KERNEL);
+       list = kzalloc(sizeof(*list), GFP_KERNEL);
        if (!list) {
                if (map->type == _DRM_REGISTERS)
                        iounmap(map->handle);
                kfree(map);
                return -EINVAL;
        }
-       memset(list, 0, sizeof(*list));
        list->map = map;
 
        mutex_lock(&dev->struct_mutex);
@@ -678,13 +677,12 @@ int drm_addbufs_agp(struct drm_device * dev, struct drm_buf_desc * request)
                return -EINVAL;
        }
 
-       entry->buflist = kmalloc(count * sizeof(*entry->buflist), GFP_KERNEL);
+       entry->buflist = kzalloc(count * sizeof(*entry->buflist), GFP_KERNEL);
        if (!entry->buflist) {
                mutex_unlock(&dev->struct_mutex);
                atomic_dec(&dev->buf_alloc);
                return -ENOMEM;
        }
-       memset(entry->buflist, 0, count * sizeof(*entry->buflist));
 
        entry->buf_size = size;
        entry->page_order = page_order;
@@ -708,7 +706,7 @@ int drm_addbufs_agp(struct drm_device * dev, struct drm_buf_desc * request)
                buf->file_priv = NULL;
 
                buf->dev_priv_size = dev->driver->dev_priv_size;
-               buf->dev_private = kmalloc(buf->dev_priv_size, GFP_KERNEL);
+               buf->dev_private = kzalloc(buf->dev_priv_size, GFP_KERNEL);
                if (!buf->dev_private) {
                        /* Set count correctly so we free the proper amount. */
                        entry->buf_count = count;
@@ -717,7 +715,6 @@ int drm_addbufs_agp(struct drm_device * dev, struct drm_buf_desc * request)
                        atomic_dec(&dev->buf_alloc);
                        return -ENOMEM;
                }
-               memset(buf->dev_private, 0, buf->dev_priv_size);
 
                DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address);
 
@@ -832,22 +829,20 @@ int drm_addbufs_pci(struct drm_device * dev, struct drm_buf_desc * request)
                return -EINVAL;
        }
 
-       entry->buflist = kmalloc(count * sizeof(*entry->buflist), GFP_KERNEL);
+       entry->buflist = kzalloc(count * sizeof(*entry->buflist), GFP_KERNEL);
        if (!entry->buflist) {
                mutex_unlock(&dev->struct_mutex);
                atomic_dec(&dev->buf_alloc);
                return -ENOMEM;
        }
-       memset(entry->buflist, 0, count * sizeof(*entry->buflist));
 
-       entry->seglist = kmalloc(count * sizeof(*entry->seglist), GFP_KERNEL);
+       entry->seglist = kzalloc(count * sizeof(*entry->seglist), GFP_KERNEL);
        if (!entry->seglist) {
                kfree(entry->buflist);
                mutex_unlock(&dev->struct_mutex);
                atomic_dec(&dev->buf_alloc);
                return -ENOMEM;
        }
-       memset(entry->seglist, 0, count * sizeof(*entry->seglist));
 
        /* Keep the original pagelist until we know all the allocations
         * have succeeded
@@ -911,8 +906,8 @@ int drm_addbufs_pci(struct drm_device * dev, struct drm_buf_desc * request)
                        buf->file_priv = NULL;
 
                        buf->dev_priv_size = dev->driver->dev_priv_size;
-                       buf->dev_private = kmalloc(buf->dev_priv_size,
-                                                 GFP_KERNEL);
+                       buf->dev_private = kzalloc(buf->dev_priv_size,
+                                               GFP_KERNEL);
                        if (!buf->dev_private) {
                                /* Set count correctly so we free the proper amount. */
                                entry->buf_count = count;
@@ -923,7 +918,6 @@ int drm_addbufs_pci(struct drm_device * dev, struct drm_buf_desc * request)
                                atomic_dec(&dev->buf_alloc);
                                return -ENOMEM;
                        }
-                       memset(buf->dev_private, 0, buf->dev_priv_size);
 
                        DRM_DEBUG("buffer %d @ %p\n",
                                  entry->buf_count, buf->address);
@@ -1048,14 +1042,13 @@ static int drm_addbufs_sg(struct drm_device * dev, struct drm_buf_desc * request
                return -EINVAL;
        }
 
-       entry->buflist = kmalloc(count * sizeof(*entry->buflist),
+       entry->buflist = kzalloc(count * sizeof(*entry->buflist),
                                GFP_KERNEL);
        if (!entry->buflist) {
                mutex_unlock(&dev->struct_mutex);
                atomic_dec(&dev->buf_alloc);
                return -ENOMEM;
        }
-       memset(entry->buflist, 0, count * sizeof(*entry->buflist));
 
        entry->buf_size = size;
        entry->page_order = page_order;
@@ -1080,7 +1073,7 @@ static int drm_addbufs_sg(struct drm_device * dev, struct drm_buf_desc * request
                buf->file_priv = NULL;
 
                buf->dev_priv_size = dev->driver->dev_priv_size;
-               buf->dev_private = kmalloc(buf->dev_priv_size, GFP_KERNEL);
+               buf->dev_private = kzalloc(buf->dev_priv_size, GFP_KERNEL);
                if (!buf->dev_private) {
                        /* Set count correctly so we free the proper amount. */
                        entry->buf_count = count;
@@ -1090,8 +1083,6 @@ static int drm_addbufs_sg(struct drm_device * dev, struct drm_buf_desc * request
                        return -ENOMEM;
                }
 
-               memset(buf->dev_private, 0, buf->dev_priv_size);
-
                DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address);
 
                offset += alignment;
@@ -1209,14 +1200,13 @@ static int drm_addbufs_fb(struct drm_device * dev, struct drm_buf_desc * request
                return -EINVAL;
        }
 
-       entry->buflist = kmalloc(count * sizeof(*entry->buflist),
+       entry->buflist = kzalloc(count * sizeof(*entry->buflist),
                                GFP_KERNEL);
        if (!entry->buflist) {
                mutex_unlock(&dev->struct_mutex);
                atomic_dec(&dev->buf_alloc);
                return -ENOMEM;
        }
-       memset(entry->buflist, 0, count * sizeof(*entry->buflist));
 
        entry->buf_size = size;
        entry->page_order = page_order;
@@ -1240,7 +1230,7 @@ static int drm_addbufs_fb(struct drm_device * dev, struct drm_buf_desc * request
                buf->file_priv = NULL;
 
                buf->dev_priv_size = dev->driver->dev_priv_size;
-               buf->dev_private = kmalloc(buf->dev_priv_size, GFP_KERNEL);
+               buf->dev_private = kzalloc(buf->dev_priv_size, GFP_KERNEL);
                if (!buf->dev_private) {
                        /* Set count correctly so we free the proper amount. */
                        entry->buf_count = count;
@@ -1249,7 +1239,6 @@ static int drm_addbufs_fb(struct drm_device * dev, struct drm_buf_desc * request
                        atomic_dec(&dev->buf_alloc);
                        return -ENOMEM;
                }
-               memset(buf->dev_private, 0, buf->dev_priv_size);
 
                DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address);