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mm: memory: use a folio in validate_page_before_insert() 

Use a folio in validate_page_before_insert() to save two compound_head()
calls.

Link: https://lkml.kernel.org/r/20231118023232.1409103-3-wangkefeng.wang@huawei.com
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Reviewed-by: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Vishal Moola (Oracle) <vishal.moola@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Kefeng Wang 2023-11-18 10:32:29 +08:00 committed by Andrew Morton
parent 1486fb5013
commit f8b6187d8d
1 changed files with 5 additions and 2 deletions
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7
mm/memory.c
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@ -1842,9 +1842,12 @@ pte_t *__get_locked_pte(struct mm_struct *mm, unsigned long addr,
static int validate_page_before_insert(struct page *page)
{
if (PageAnon(page) || PageSlab(page) || page_has_type(page))
struct folio *folio = page_folio(page);
if (folio_test_anon(folio) || folio_test_slab(folio) ||
page_has_type(page))
return -EINVAL;
flush_dcache_page(page);
flush_dcache_folio(folio);
return 0;
}