Commit b43790ee authored by Cyrill Gorcunov's avatar Cyrill Gorcunov Committed by Linus Torvalds
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mm: softdirty: don't forget to save file map softdiry bit on unmap

pte_file_mksoft_dirty operates with argument passed by a value and
returns modified result thus we need to assign @ptfile here, otherwise
itis a no-op which may lead to loss of the softdirty bit.
Signed-off-by: default avatarCyrill Gorcunov <>
Cc: Pavel Emelyanov <>
Cc: Hugh Dickins <>
Signed-off-by: default avatarAndrew Morton <>
Signed-off-by: default avatarLinus Torvalds <>
parent 0bf07331
......@@ -1361,7 +1361,7 @@ static int try_to_unmap_cluster(unsigned long cursor, unsigned int *mapcount,
if (page->index != linear_page_index(vma, address)) {
pte_t ptfile = pgoff_to_pte(page->index);
if (pte_soft_dirty(pteval))
ptfile = pte_file_mksoft_dirty(ptfile);
set_pte_at(mm, address, pte, ptfile);
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