Commit c4d1a92d authored by Liam R. Howlett's avatar Liam R. Howlett Committed by Andrew Morton
Browse files

mm/gup: use maple tree navigation instead of linked list 

Use find_vma_intersection() to locate the VMAs in __mm_populate() instead
of using find_vma() and the linked list.

Link: https://lkml.kernel.org/r/20220906194824.2110408-52-Liam.Howlett@oracle.com


Signed-off-by: default avatarLiam R. Howlett <Liam.Howlett@Oracle.com>
Reviewed-by: default avatarDavidlohr Bueso <dave@stgolabs.net>
Tested-by: default avatarYu 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: Vlastimil Babka <vbabka@suse.cz>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent becc8cdb

mm/gup.c

+4 −3
Original line number Diff line number Diff line
@@ -1674,10 +1674,11 @@ int __mm_populate(unsigned long start, unsigned long len, int ignore_errors) 
		if (!locked) {

			locked = 1;

			mmap_read_lock(mm);

			vma = find_vma(mm, nstart);

			vma = find_vma_intersection(mm, nstart, end);

		} else if (nstart >= vma->vm_end)

			vma = vma->vm_next;

		if (!vma || vma->vm_start >= end)

			vma = find_vma_intersection(mm, vma->vm_end, end);



		if (!vma)

			break;

		/*

		 * Set [nstart; nend) to intersection of desired address