z3fold: Simplify the zhdr initialization code in init_z3fold_page()

Commit Message

Miaohe Lin Jan. 20, 2021, 8:58 a.m. UTC

We can simplify the zhdr initialization by memset() the zhdr first instead
of set struct member to zero one by one. This would also make code more
compact and clear.

Signed-off-by: Miaohe Lin <[e-mail]>
---
 mm/z3fold.c | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

Patch

diff --git a/mm/z3fold.c b/mm/z3fold.c
index 8e53cdf4d190..c1ccf6bb0ffb 100644
--- a/mm/z3fold.c
+++ b/mm/z3fold.c
@@ -413,16 +413,10 @@  static struct z3fold_header *init_z3fold_page(struct page *page, bool headless,
 	if (!slots)
 		return NULL;
 
+	memset(zhdr, 0, sizeof(*zhdr));
 	spin_lock_init(&zhdr->page_lock);
 	kref_init(&zhdr->refcount);
-	zhdr->first_chunks = 0;
-	zhdr->middle_chunks = 0;
-	zhdr->last_chunks = 0;
-	zhdr->first_num = 0;
-	zhdr->start_middle = 0;
 	zhdr->cpu = -1;
-	zhdr->foreign_handles = 0;
-	zhdr->mapped_count = 0;
 	zhdr->slots = slots;
 	zhdr->pool = pool;
 	INIT_LIST_HEAD(&zhdr->buddy);