+ mm-move-fold_vm_numa_events-to-fix-numa-without-smp.patch added to -mm tree

+ mm-move-fold_vm_numa_events-to-fix-numa-without-smp.patch added to -mm tree

[akpm]

The patch titled
     Subject: mm: move fold_vm_numa_events() to fix NUMA without SMP
has been added to the -mm tree.  Its filename is
     mm-move-fold_vm_numa_events-to-fix-numa-without-smp.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/mm-move-fold_vm_numa_events-to-fix-numa-without-smp.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/mm-move-fold_vm_numa_events-to-fix-numa-without-smp.patch

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------------------------------------------------------
From: Geert Uytterhoeven <geert+renesas@glider.be>
Subject: mm: move fold_vm_numa_events() to fix NUMA without SMP

If CONFIG_NUMA=y, but CONFIG_SMP=n (e.g. sh/migor_defconfig):

    sh4-linux-gnu-ld: mm/vmstat.o: in function `vmstat_start':
    vmstat.c:(.text+0x97c): undefined reference to `fold_vm_numa_events'
    sh4-linux-gnu-ld: drivers/base/node.o: in function `node_read_vmstat':
    node.c:(.text+0x140): undefined reference to `fold_vm_numa_events'
    sh4-linux-gnu-ld: drivers/base/node.o: in function `node_read_numastat':
    node.c:(.text+0x1d0): undefined reference to `fold_vm_numa_events'

Fix this by moving fold_vm_numa_events() outside the SMP-only section.

Link: https://lkml.kernel.org/r/9d16ccdd9ef32803d7100c84f737de6a749314fb.1631781495.git.geert+renesas@glider.be
Fixes: f19298b9516c1a03 ("mm/vmstat: convert NUMA statistics to basic NUMA counters")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Gon Solo <gonsolo@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Juri Lelli <juri.lelli@redhat.com>
Cc: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rich Felker <dalias@libc.org>
Cc: Vincent Guittot <vincent.guittot@linaro.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Yoshinori Sato <ysato@users.osdn.me>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/vmstat.c |   56 +++++++++++++++++++++++++-------------------------
 1 file changed, 28 insertions(+), 28 deletions(-)

--- a/mm/vmstat.c~mm-move-fold_vm_numa_events-to-fix-numa-without-smp
+++ a/mm/vmstat.c
@@ -165,6 +165,34 @@ atomic_long_t vm_numa_event[NR_VM_NUMA_E
 EXPORT_SYMBOL(vm_zone_stat);
 EXPORT_SYMBOL(vm_node_stat);
 
+#ifdef CONFIG_NUMA
+static void fold_vm_zone_numa_events(struct zone *zone)
+{
+	unsigned long zone_numa_events[NR_VM_NUMA_EVENT_ITEMS] = { 0, };
+	int cpu;
+	enum numa_stat_item item;
+
+	for_each_online_cpu(cpu) {
+		struct per_cpu_zonestat *pzstats;
+
+		pzstats = per_cpu_ptr(zone->per_cpu_zonestats, cpu);
+		for (item = 0; item < NR_VM_NUMA_EVENT_ITEMS; item++)
+			zone_numa_events[item] += xchg(&pzstats->vm_numa_event[item], 0);
+	}
+
+	for (item = 0; item < NR_VM_NUMA_EVENT_ITEMS; item++)
+		zone_numa_event_add(zone_numa_events[item], zone, item);
+}
+
+void fold_vm_numa_events(void)
+{
+	struct zone *zone;
+
+	for_each_populated_zone(zone)
+		fold_vm_zone_numa_events(zone);
+}
+#endif
+
 #ifdef CONFIG_SMP
 
 int calculate_pressure_threshold(struct zone *zone)
@@ -771,34 +799,6 @@ static int fold_diff(int *zone_diff, int
 	return changes;
 }
 
-#ifdef CONFIG_NUMA
-static void fold_vm_zone_numa_events(struct zone *zone)
-{
-	unsigned long zone_numa_events[NR_VM_NUMA_EVENT_ITEMS] = { 0, };
-	int cpu;
-	enum numa_stat_item item;
-
-	for_each_online_cpu(cpu) {
-		struct per_cpu_zonestat *pzstats;
-
-		pzstats = per_cpu_ptr(zone->per_cpu_zonestats, cpu);
-		for (item = 0; item < NR_VM_NUMA_EVENT_ITEMS; item++)
-			zone_numa_events[item] += xchg(&pzstats->vm_numa_event[item], 0);
-	}
-
-	for (item = 0; item < NR_VM_NUMA_EVENT_ITEMS; item++)
-		zone_numa_event_add(zone_numa_events[item], zone, item);
-}
-
-void fold_vm_numa_events(void)
-{
-	struct zone *zone;
-
-	for_each_populated_zone(zone)
-		fold_vm_zone_numa_events(zone);
-}
-#endif
-
 /*
  * Update the zone counters for the current cpu.
  *
_

Patches currently in -mm which might be from geert+renesas@glider.be are

mm-move-node_reclaim_distance-to-fix-numa-without-smp.patch
mm-move-fold_vm_numa_events-to-fix-numa-without-smp.patch