[PATCH 2/2] numa: make "nr_online_nodes" unsigned int

From: Alexey Dobriyan
Date: Fri Feb 01 2019 - 17:31:58 EST


Number of online NUMA nodes can't be negative as well.
This doesn't save space as the variable is used only in 32-bit context,
but do it anyway for consistency.

Signed-off-by: Alexey Dobriyan <adobriyan@xxxxxxxxx>
---

include/linux/nodemask.h | 4 ++--
mm/page_alloc.c | 4 ++--
2 files changed, 4 insertions(+), 4 deletions(-)

--- a/include/linux/nodemask.h
+++ b/include/linux/nodemask.h
@@ -445,7 +445,7 @@ static inline int next_memory_node(int nid)
}

extern unsigned int nr_node_ids;
-extern int nr_online_nodes;
+extern unsigned int nr_online_nodes;

static inline void node_set_online(int nid)
{
@@ -486,7 +486,7 @@ static inline int num_node_state(enum node_states state)
#define first_memory_node 0
#define next_online_node(nid) (MAX_NUMNODES)
#define nr_node_ids 1U
-#define nr_online_nodes 1
+#define nr_online_nodes 1U

#define node_set_online(node) node_set_state((node), N_ONLINE)
#define node_set_offline(node) node_clear_state((node), N_ONLINE)
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -290,7 +290,7 @@ EXPORT_SYMBOL(movable_zone);

#if MAX_NUMNODES > 1
unsigned int nr_node_ids __read_mostly = MAX_NUMNODES;
-int nr_online_nodes __read_mostly = 1;
+unsigned int nr_online_nodes __read_mostly = 1;
EXPORT_SYMBOL(nr_node_ids);
EXPORT_SYMBOL(nr_online_nodes);
#endif
@@ -5597,7 +5597,7 @@ void __ref build_all_zonelists(pg_data_t *pgdat)
else
page_group_by_mobility_disabled = 0;

- pr_info("Built %i zonelists, mobility grouping %s. Total pages: %ld\n",
+ pr_info("Built %u zonelists, mobility grouping %s. Total pages: %ld\n",
nr_online_nodes,
page_group_by_mobility_disabled ? "off" : "on",
vm_total_pages);