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

madvise_walk_vmas() no longer uses linked list.

Link: https://lkml.kernel.org/r/20220906194824.2110408-55-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: Davidlohr Bueso <dave@stgolabs.net>
Tested-by: Yu Zhao <yuzhao@google.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Cc: SeongJae Park <sj@kernel.org>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/mm/madvise.c b/mm/madvise.c
index 4f86eb7f554d65c6762b39ea710eedb55f098745..a3fc4cd32ed364dafa78712f98f13bd054ef8624 100644 (file)
--- a/mm/madvise.c
+++ b/mm/madvise.c
@@ -1245,7 +1245,7 @@ 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);
        }