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Code Issues Releases Wiki Activity

page_alloc: use folio fields directly

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Rmove the uses of compound_mapcount_ptr(), head_compound_mapcount() and
subpages_mapcount_ptr()

Link: https://lkml.kernel.org/r/20230111142915.1001531-10-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2023-01-11 14:28:55 +00:00 committed by Andrew Morton
parent 4d510f3da4
commit 65a689f35a
1 changed files with 6 additions and 6 deletions
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12
mm/page_alloc.c
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@ -779,8 +779,8 @@ static void prep_compound_head(struct page *page, unsigned int order)
set_compound_page_dtor(page, COMPOUND_PAGE_DTOR);
set_compound_order(page, order);
atomic_set(compound_mapcount_ptr(page), -1);
atomic_set(subpages_mapcount_ptr(page), 0);
atomic_set(&folio->_entire_mapcount, -1);
atomic_set(&folio->_nr_pages_mapped, 0);
atomic_set(&folio->_pincount, 0);
}
@ -1309,12 +1309,12 @@ static int free_tail_pages_check(struct page *head_page, struct page *page)
switch (page - head_page) {
case 1:
/* the first tail page: these may be in place of ->mapping */
if (unlikely(head_compound_mapcount(head_page))) {
bad_page(page, "nonzero compound_mapcount");
if (unlikely(folio_entire_mapcount(folio))) {
bad_page(page, "nonzero entire_mapcount");
goto out;
}
if (unlikely(atomic_read(subpages_mapcount_ptr(head_page)))) {
bad_page(page, "nonzero subpages_mapcount");
if (unlikely(atomic_read(&folio->_nr_pages_mapped))) {
bad_page(page, "nonzero nr_pages_mapped");
goto out;
}
if (unlikely(atomic_read(&folio->_pincount))) {