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mm/smaps: use vma->vm_pgoff directly when counting partial swap 

As it's trying to cover the whole vma anyways, use direct vm_pgoff value
and vma_pages() rather than linear_page_index.

Link: https://lkml.kernel.org/r/20210917164756.8586-3-peterx@redhat.com
Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Hugh Dickins <hughd@google.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Peter Xu 2021-11-05 13:36:02 -07:00 committed by Linus Torvalds
parent 10c848c8b4
commit 02399c8802
1 changed files with 2 additions and 3 deletions
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mm/shmem.c
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@ -856,9 +856,8 @@ unsigned long shmem_swap_usage(struct vm_area_struct *vma)
return swapped << PAGE_SHIFT;
/* Here comes the more involved part */
return shmem_partial_swap_usage(mapping,
linear_page_index(vma, vma->vm_start),
linear_page_index(vma, vma->vm_end));
return shmem_partial_swap_usage(mapping, vma->vm_pgoff,
vma->vm_pgoff + vma_pages(vma));
}
/*