rmap: recompute pgoff for unmapping huge page
We have to recompute pgoff if the given page is huge, since result based on HPAGE_SIZE is not approapriate for scanning the vma interval tree, as shown by commit 36e4f20a ("hugetlb: do not use vma_hugecache_offset() for vma_prio_tree_foreach"). Signed-off-by: NHillf Danton <dhillf@gmail.com> Cc: Michal Hocko <mhocko@suse.cz> Cc: Michel Lespinasse <walken@google.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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