Re: [PATCH 01/16] md/bitmap: Use kmalloc_array() in bitmap_storage_alloc()

From: Markus Elfring <redacted>
Date: Tue, 27 Sep 2016 13:01:07 +0200

* A multiplication for the size determination of a memory allocation
  indicated that an array data structure should be processed.
  Thus use the corresponding function "kmalloc_array".

  This issue was detected by using the Coccinelle software.

* Replace the specification of a data type by a pointer dereference
  to make the corresponding size determination a bit safer according to
  the Linux coding style convention.

Signed-off-by: Markus Elfring <redacted>
---
 drivers/md/bitmap.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c
index 13041ee..8cfb02c 100644
--- a/drivers/md/bitmap.c
+++ b/drivers/md/bitmap.c

@@ -760,9 +760,9 @@ static int bitmap_storage_alloc(struct bitmap_storage *store,
 
 	num_pages = DIV_ROUND_UP(bytes, PAGE_SIZE);
 	offset = slot_number * num_pages;
-
-	store->filemap = kmalloc(sizeof(struct page *)
-				 * num_pages, GFP_KERNEL);
+	store->filemap = kmalloc_array(num_pages,
+				       sizeof(*store->filemap),
+				       GFP_KERNEL);