From: Liam R. Howlett <Liam.Howlett@Oracle.com>
Date: Thu, 8 Apr 2021 20:24:41 +0000 (-0400)
Subject: mm/migrate: Use vma_lookup() in do_pages_stat_array()
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=da4442160cb9ecb9a022a4435a280ac0960cf4b4;p=users%2Fjedix%2Flinux-maple.git

mm/migrate: Use vma_lookup() in do_pages_stat_array()

Use vma_lookup() to find the VMA at a specific address.  As vma_lookup()
will return NULL if the address is not within any VMA, the start address
no longer needs to be validated.

Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
---

diff --git a/mm/migrate.c b/mm/migrate.c
index b234c3f3acb79..611781c0f9b54 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -1833,8 +1833,8 @@ static void do_pages_stat_array(struct mm_struct *mm, unsigned long nr_pages,
 		struct page *page;
 		int err = -EFAULT;
 
-		vma = find_vma(mm, addr);
-		if (!vma || addr < vma->vm_start)
+		vma = vma_lookup(mm, addr);
+		if (!vma)
 			goto set_status;
 
 		/* FOLL_DUMP to ignore special (like zero) pages */