[RFC 02/10] mm/vmalloc: Skip vmallocinfo NUMA stats for VM_SPARSE

Bail from show_numa_info() in vmalloc_info_show() for areas with
VM_SPARSE set. This lets clients that allocate VM_SPARSE areas directly
use vm_struct's nr_pages and pages fields.

Signed-off-by: David Stevens <redacted>
---
 mm/vmalloc.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index f4fa227a8d7f..d39897300f29 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c

@@ -5294,6 +5294,9 @@ static void show_numa_info(struct seq_file *m, struct vm_struct *v,
 	if (!counters)
 		return;
 
+	if (v->flags & VM_SPARSE)
+		return;
+
 	memset(counters, 0, nr_node_ids * sizeof(unsigned int));
 
 	for (nr = 0; nr < v->nr_pages; nr += step)

-- 
2.55.0.897.gb25b4bd76c-goog