linux-kernel - [Patch v2 1/2] mm/page_alloc.c: use NODE_MASK_NONE define used

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20200327220121.27823-1-richard.weiyang@gmail.com>
Date:   Fri, 27 Mar 2020 22:01:20 +0000
From:   Wei Yang <richard.weiyang@...il.com>
To:     akpm@...ux-foundation.org
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org, jgg@...pe.ca,
        david@...hat.com, Wei Yang <richard.weiyang@...il.com>
Subject: [Patch v2 1/2] mm/page_alloc.c: use NODE_MASK_NONE define used_mask

For all 0 nodemask_t, we have already define macro NODE_MASK_NONE.
Leverage this instead of clear it at run time.

Signed-off-by: Wei Yang <richard.weiyang@...il.com>

---
v2: use NODE_MASK_NONE as suggested by David Hildenbrand
---
 mm/page_alloc.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index ef790dfad6aa..dfcf2682ed40 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -5587,14 +5587,13 @@ static void build_zonelists(pg_data_t *pgdat)
 {
 	static int node_order[MAX_NUMNODES];
 	int node, load, nr_nodes = 0;
-	nodemask_t used_mask;
+	nodemask_t used_mask = NODE_MASK_NONE;
 	int local_node, prev_node;
 
 	/* NUMA-aware ordering of nodes */
 	local_node = pgdat->node_id;
 	load = nr_online_nodes;
 	prev_node = local_node;
-	nodes_clear(used_mask);
 
 	memset(node_order, 0, sizeof(node_order));
 	while ((node = find_next_best_node(local_node, &used_mask)) >= 0) {
-- 
2.23.0