From: Uladzislau Rezki (Sony) <urezki@gmail.com>
Date: Tue, 8 Apr 2025 15:15:47 +0000 (+0200)
Subject: vmalloc: add for_each_vmap_node() helper
X-Git-Tag: v6.16-rc1~92^2~209
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4318255091eab6722bea3816bdee09ac7db68035;p=thirdparty%2Flinux.git

vmalloc: add for_each_vmap_node() helper

To simplify iteration over vmap-nodes, add the for_each_vmap_node() macro
that iterates over all nodes in a system.  It tends to simplify the code.

Link: https://lkml.kernel.org/r/20250408151549.77937-1-urezki@gmail.com
Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Cc: Christop Hellwig <hch@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 44b735a4573a7..55949360a5cbd 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -900,6 +900,11 @@ static struct vmap_node *vmap_nodes = &single;
 static __read_mostly unsigned int nr_vmap_nodes = 1;
 static __read_mostly unsigned int vmap_zone_size = 1;
 
+/* A simple iterator over all vmap-nodes. */
+#define for_each_vmap_node(vn)	\
+	for ((vn) = &vmap_nodes[0];	\
+		(vn) < &vmap_nodes[nr_vmap_nodes]; (vn)++)
+
 static inline unsigned int
 addr_to_node_id(unsigned long addr)
 {