From: Liam R. Howlett <Liam.Howlett@Oracle.com>
Date: Wed, 20 Jul 2022 02:18:00 +0000 (+0000)
Subject: mm/madvise: use vma_find() instead of vma linked list
X-Git-Tag: howlett/maple/20220816~15
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=77847c09abc90f83b5f92f6fcdd210e5aff4dadc;p=users%2Fjedix%2Flinux-maple.git

mm/madvise: use vma_find() instead of vma linked list

madvise_walk_vmas() no longer uses linked list.

Link: https://lkml.kernel.org/r/20220504011345.662299-39-Liam.Howlett@oracle.com
Link: https://lkml.kernel.org/r/20220621204632.3370049-55-Liam.Howlett@oracle.com
Link: https://lkml.kernel.org/r/20220720021727.17018-55-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: David Howells <dhowells@redhat.com>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Cc: SeongJae Park <sj@kernel.org>
Cc: Will Deacon <will@kernel.org>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: David Hildenbrand <david@redhat.com>
Cc: Hulk Robot <hulkci@huawei.com>
Cc: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

diff --git a/mm/madvise.c b/mm/madvise.c
index 5f0f0948a50e..851fa4e134bc 100644
--- a/mm/madvise.c
+++ b/mm/madvise.c
@@ -1238,7 +1238,7 @@ int madvise_walk_vmas(struct mm_struct *mm, unsigned long start,
 		if (start >= end)
 			break;
 		if (prev)
-			vma = prev->vm_next;
+			vma = find_vma(mm, prev->vm_end);
 		else	/* madvise_remove dropped mmap_lock */
 			vma = find_vma(mm, start);
 	}