From: Hugh Dickins <hughd@google.com>
Date: Wed, 19 Oct 2022 03:18:38 +0000 (-0700)
Subject: mm: /proc/pid/smaps_rollup: fix maple tree search
X-Git-Tag: v6.1-rc5~84^2~27
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=08ac85521cb2e26f25b885492180815ce8eaf4b7;p=platform%2Fkernel%2Flinux-starfive.git

mm: /proc/pid/smaps_rollup: fix maple tree search

/proc/pid/smaps_rollup showed 0 kB for everything: now find first vma.

Link: https://lkml.kernel.org/r/3011bee7-182-97a2-1083-d5f5b688e54b@google.com
Fixes: c4c84f06285e ("fs/proc/task_mmu: stop using linked list and highest_vm_end")
Signed-off-by: Hugh Dickins <hughd@google.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 8b4f3073f8f5..8a74cdcc9af0 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -902,7 +902,7 @@ static int show_smaps_rollup(struct seq_file *m, void *v)
 		goto out_put_mm;
 
 	hold_task_mempolicy(priv);
-	vma = mas_find(&mas, 0);
+	vma = mas_find(&mas, ULONG_MAX);
 
 	if (unlikely(!vma))
 		goto empty_set;