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authorAlexey Dobriyan <adobriyan@gmail.com>2019-03-06 02:48:26 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2019-03-06 08:07:19 +0300
commitb9726c26dc21b15a2faea96fae3a42f2f7fffdcb (patch)
tree28c39800b37b56f9cb026a8dfc79e35c6208e2b4 /include/linux/nodemask.h
parentd342a0b38674867ea67fde47b0e1e60ffe9f17a2 (diff)
downloadlinux-b9726c26dc21b15a2faea96fae3a42f2f7fffdcb.tar.xz
numa: make "nr_node_ids" unsigned int
Number of NUMA nodes can't be negative. This saves a few bytes on x86_64: add/remove: 0/0 grow/shrink: 4/21 up/down: 27/-265 (-238) Function old new delta hv_synic_alloc.cold 88 110 +22 prealloc_shrinker 260 262 +2 bootstrap 249 251 +2 sched_init_numa 1566 1567 +1 show_slab_objects 778 777 -1 s_show 1201 1200 -1 kmem_cache_init 346 345 -1 __alloc_workqueue_key 1146 1145 -1 mem_cgroup_css_alloc 1614 1612 -2 __do_sys_swapon 4702 4699 -3 __list_lru_init 655 651 -4 nic_probe 2379 2374 -5 store_user_store 118 111 -7 red_zone_store 106 99 -7 poison_store 106 99 -7 wq_numa_init 348 338 -10 __kmem_cache_empty 75 65 -10 task_numa_free 186 173 -13 merge_across_nodes_store 351 336 -15 irq_create_affinity_masks 1261 1246 -15 do_numa_crng_init 343 321 -22 task_numa_fault 4760 4737 -23 swapfile_init 179 156 -23 hv_synic_alloc 536 492 -44 apply_wqattrs_prepare 746 695 -51 Link: http://lkml.kernel.org/r/20190201223029.GA15820@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>
Diffstat (limited to 'include/linux/nodemask.h')
-rw-r--r--include/linux/nodemask.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/nodemask.h b/include/linux/nodemask.h
index 5a30ad594ccc..962c5e783d50 100644
--- a/include/linux/nodemask.h
+++ b/include/linux/nodemask.h
@@ -444,7 +444,7 @@ static inline int next_memory_node(int nid)
return next_node(nid, node_states[N_MEMORY]);
}
-extern int nr_node_ids;
+extern unsigned int nr_node_ids;
extern int nr_online_nodes;
static inline void node_set_online(int nid)
@@ -485,7 +485,7 @@ static inline int num_node_state(enum node_states state)
#define first_online_node 0
#define first_memory_node 0
#define next_online_node(nid) (MAX_NUMNODES)
-#define nr_node_ids 1
+#define nr_node_ids 1U
#define nr_online_nodes 1
#define node_set_online(node) node_set_state((node), N_ONLINE)