[PATCH 3/3] apparmor: replace get_zeroed_page() with kzalloc()

[Mike Rapoport (Microsoft)]

multi_transaction_new() allocates memory with get_zeroed_page() and uses
it as struct multi_transaction.

The usage of that structure does not require struct page access and it is
better to allocate multi_transaction objects with kzalloc() that provides
better scalability and more debugging possibilities.

Replace use of get_zeroed_page() with kzalloc().

Link: https://lore.kernel.org/all/635405e4-9423-4a25-a6e7-e03c8ea0bcbe@redhat.com
Signed-off-by: Mike Rapoport (Microsoft) <rppt at kernel.org>
---
 security/apparmor/apparmorfs.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/security/apparmor/apparmorfs.c b/security/apparmor/apparmorfs.c
index ededaf46f3ca..e5c99c71e7ca 100644
--- a/security/apparmor/apparmorfs.c
+++ b/security/apparmor/apparmorfs.c
@@ -9,6 +9,7 @@
  */
 
 #include <linux/ctype.h>
+#include <linux/slab.h>
 #include <linux/security.h>
 #include <linux/vmalloc.h>
 #include <linux/init.h>
@@ -904,7 +905,7 @@ static void multi_transaction_kref(struct kref *kref)
 	struct multi_transaction *t;
 
 	t = container_of(kref, struct multi_transaction, count);
-	free_page((unsigned long) t);
+	kfree(t);
 }
 
 static struct multi_transaction *
@@ -947,7 +948,7 @@ static struct multi_transaction *multi_transaction_new(struct file *file,
 	if (size > MULTI_TRANSACTION_LIMIT - 1)
 		return ERR_PTR(-EFBIG);
 
-	t = (struct multi_transaction *)get_zeroed_page(GFP_KERNEL);
+	t = kzalloc(PAGE_SIZE, GFP_KERNEL);
 	if (!t)
 		return ERR_PTR(-ENOMEM);
 	kref_init(&t->count);

-- 
2.53.0