numa: make "nr_online_nodes" unsigned int

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.

Link: http://lkml.kernel.org/r/20190201223151.GB15820@avx2
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/include/linux/nodemask.h b/include/linux/nodemask.h
index 962c5e783d50bfc8cafaffdac896231d211a74c8..27e7fa36f707fb6307fdd0abd4e3114e2e90ae12 100644 (file)
--- 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)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 8df43caf2eb731f39c6716ce299f69fcbb4de013..c29828ec91836ed1fd0d1b1ad9006fbbc4ee7872 100644 (file)
--- 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
@@ -5664,7 +5664,7 @@ 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);