In commit b832a354d787 ("mm/memory: page_add_anon_rmap() ->
folio_add_anon_rmap_pte()") we accidentally changed the sanity check to
essentially ignore anonymous folio by mis-placing the "!" ... but we really
always only get anonymous folios in restore_exclusive_pte().
However, in the meantime we removed the separate "writable
device-exclusive entries" and always detect if the PTE can be writable
using can_change_pte_writable() -- which also consults
PageAnonExclusive.
So let's just get rid of this sanity check completely.
Signed-off-by: David Hildenbrand <david@xxxxxxxxxx>
---
mm/memory.c | 3 ---
1 file changed, 3 deletions(-)
diff --git a/mm/memory.c b/mm/memory.c
index 567b45e5d149e..507045fa719cc 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -740,9 +740,6 @@ static void restore_exclusive_pte(struct vm_area_struct *vma,
pte = pte_mkdirty(pte);
pte = pte_mkwrite(pte, vma);
}
-
- VM_BUG_ON_FOLIO(pte_write(pte) && (!folio_test_anon(folio) &&
- PageAnonExclusive(page)), folio);
set_pte_at(vma->vm_mm, address, ptep, pte);
/*
--
2.48.1
