treewide: Replace kmalloc with kmalloc_obj for non-scalar types

This is the result of running the Coccinelle script from
scripts/coccinelle/api/kmalloc_objs.cocci. The script is designed to
avoid scalar types (which need careful case-by-case checking), and
instead replace kmalloc-family calls that allocate struct or union
object instances:

Single allocations:	kmalloc(sizeof(TYPE), ...)
are replaced with:	kmalloc_obj(TYPE, ...)

Array allocations:	kmalloc_array(COUNT, sizeof(TYPE), ...)
are replaced with:	kmalloc_objs(TYPE, COUNT, ...)

Flex array allocations:	kmalloc(struct_size(PTR, FAM, COUNT), ...)
are replaced with:	kmalloc_flex(*PTR, FAM, COUNT, ...)

(where TYPE may also be *VAR)

The resulting allocations no longer return "void *", instead returning
"TYPE *".

Signed-off-by: Kees Cook <kees@kernel.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/fs/char_dev.c b/fs/char_dev.c
index bf7b32650e54..49b2641bbe03 100644
--- a/fs/char_dev.c
+++ b/fs/char_dev.c
@@ -115,7 +115,7 @@ __register_chrdev_region(unsigned int major, unsigned int baseminor,
 		return ERR_PTR(-EINVAL);
 	}
 
-	cd = kzalloc(sizeof(struct char_device_struct), GFP_KERNEL);
+	cd = kzalloc_obj(struct char_device_struct, GFP_KERNEL);
 	if (cd == NULL)
 		return ERR_PTR(-ENOMEM);
 
@@ -636,7 +636,7 @@ static struct kobj_type ktype_cdev_dynamic = {
  */
 struct cdev *cdev_alloc(void)
 {
-	struct cdev *p = kzalloc(sizeof(struct cdev), GFP_KERNEL);
+	struct cdev *p = kzalloc_obj(struct cdev, GFP_KERNEL);
 	if (p) {
 		INIT_LIST_HEAD(&p->list);
 		kobject_init(&p->kobj, &ktype_cdev_dynamic);