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mm: remove __HAVE_ARCH_PTE_SWP_EXCLUSIVE

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__HAVE_ARCH_PTE_SWP_EXCLUSIVE is now supported by all architectures that
support swp PTEs, so let's drop it.

Link: https://lkml.kernel.org/r/20230113171026.582290-27-david@redhat.com
Signed-off-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
David Hildenbrand
2023-01-13 18:10:26 +01:00
committed by Andrew Morton
parent f5c3fe300c
commit 950fe885a8
31 changed files with 0 additions and 73 deletions
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11
mm/rmap.c
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@@ -1710,17 +1710,6 @@ static bool try_to_unmap_one(struct folio *folio, struct vm_area_struct *vma,
page_vma_mapped_walk_done(&pvmw);
break;
}
/*
* Note: We *don't* remember if the page was mapped
* exclusively in the swap pte if the architecture
* doesn't support __HAVE_ARCH_PTE_SWP_EXCLUSIVE. In
* that case, swapin code has to re-determine that
* manually and might detect the page as possibly
* shared, for example, if there are other references on
* the page or if the page is under writeback. We made
* sure that there are no GUP pins on the page that
* would rely on it, so for GUP pins this is fine.
*/
if (list_empty(&mm->mmlist)) {
spin_lock(&mmlist_lock);
if (list_empty(&mm->mmlist))