Remove array_size() calls and replace vmalloc() with vmalloc_array() in
bsd_alloc().

vmalloc_array() is also optimized better, resulting in less instructions
being used.

Signed-off-by: Qianfeng Rong <rongqianfeng@vivo.com>
---
 drivers/net/ppp/bsd_comp.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ppp/bsd_comp.c b/drivers/net/ppp/bsd_comp.c
index 55954594e157..f385b759d5cf 100644
--- a/drivers/net/ppp/bsd_comp.c
+++ b/drivers/net/ppp/bsd_comp.c
@@ -406,7 +406,7 @@ static void *bsd_alloc (unsigned char *options, int opt_len, int decomp)
  * Allocate space for the dictionary. This may be more than one page in
  * length.
  */
-    db->dict = vmalloc(array_size(hsize, sizeof(struct bsd_dict)));
+    db->dict = vmalloc_array(hsize, sizeof(struct bsd_dict));
     if (!db->dict)
       {
 	bsd_free (db);
@@ -425,7 +425,7 @@ static void *bsd_alloc (unsigned char *options, int opt_len, int decomp)
  */
     else
       {
-        db->lens = vmalloc(array_size(sizeof(db->lens[0]), (maxmaxcode + 1)));
+        db->lens = vmalloc_array(maxmaxcode + 1, sizeof(db->lens[0]));
 	if (!db->lens)
 	  {
 	    bsd_free (db);
-- 
2.34.1