mm: remove PageAnonExclusive assertions in unuse_pte()

mainline inclusion
from mainline-v6.8-rc1
category: performance

The page in question is either freshly allocated or known to be in
the swap cache; these assertions are not particularly useful.

Link: https://lkml.kernel.org/r/20231212164813.2540119-1-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
(cherry picked from commit 8d294a8)
Signed-off-by: Wentao Guan <guanwentao@uniontech.com>

Author: Matthew Wilcox (Oracle)

mm/swapfile.c

@@ -1797,10 +1797,6 @@ static int unuse_pte(struct vm_area_struct *vma, pmd_t *pmd,
 	 */
 	arch_swap_restore(entry, page_folio(page));
 
-	/* See do_swap_page() */
-	BUG_ON(!PageAnon(page) && PageMappedToDisk(page));
-	BUG_ON(PageAnon(page) && PageAnonExclusive(page));
-
 	dec_mm_counter(vma->vm_mm, MM_SWAPENTS);
 	inc_mm_counter(vma->vm_mm, MM_ANONPAGES);
 	get_page(page);