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mm: remove HUGETLB_PAGE_DTOR

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We can use a bit in page[1].flags to indicate that this folio belongs to
hugetlb instead of using a value in page[1].dtors.  That lets
folio_test_hugetlb() become an inline function like it should be.  We can
also get rid of NULL_COMPOUND_DTOR.

Link: https://lkml.kernel.org/r/20230816151201.3655946-8-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: David Hildenbrand <david@redhat.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Sidhartha Kumar <sidhartha.kumar@oracle.com>
Cc: Yanteng Si <siyanteng@loongson.cn>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Matthew Wilcox (Oracle)
2023-08-16 16:11:55 +01:00
committed by Andrew Morton
parent 0f2f43fabb
commit 9c5ccf2db0
6 changed files with 43 additions and 67 deletions
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4
include/linux/mm.h
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@@ -1240,11 +1240,7 @@ void folio_copy(struct folio *dst, struct folio *src);
unsigned long nr_free_buffer_pages(void);
enum compound_dtor_id {
NULL_COMPOUND_DTOR,
COMPOUND_PAGE_DTOR,
#ifdef CONFIG_HUGETLB_PAGE
HUGETLB_PAGE_DTOR,
#endif
TRANSHUGE_PAGE_DTOR,
NR_COMPOUND_DTORS,
};