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, 3 insertions, 3 deletions

diff --git a/drivers/xen/evtchn.c b/drivers/xen/evtchn.c
index 7e4a13e632dc..568f1830f3a3 100644
--- a/drivers/xen/evtchn.c
+++ b/drivers/xen/evtchn.c
@@ -332,7 +332,7 @@ static int evtchn_resize_ring(struct per_user_data *u)
 	else
 		new_size = 2 * u->ring_size;
 
-	new_ring = kvmalloc_array(new_size, sizeof(*new_ring), GFP_KERNEL);
+	new_ring = kvmalloc_objs(*new_ring, new_size, GFP_KERNEL);
 	if (!new_ring)
 		return -ENOMEM;
 
@@ -386,7 +386,7 @@ static int evtchn_bind_to_user(struct per_user_data *u, evtchn_port_t port,
 	 * serialized bind operations.)
 	 */
 
-	evtchn = kzalloc(sizeof(*evtchn), GFP_KERNEL);
+	evtchn = kzalloc_obj(*evtchn, GFP_KERNEL);
 	if (!evtchn)
 		return -ENOMEM;
 
@@ -642,7 +642,7 @@ static int evtchn_open(struct inode *inode, struct file *filp)
 {
 	struct per_user_data *u;
 
-	u = kzalloc(sizeof(*u), GFP_KERNEL);
+	u = kzalloc_obj(*u, GFP_KERNEL);
 	if (u == NULL)
 		return -ENOMEM;