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mm/writeback: Add folio_cancel_dirty()

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Turn __cancel_dirty_page() into __folio_cancel_dirty() and add wrappers.
Move the prototypes into pagemap.h since this is page cache functionality.
Saves 44 bytes of kernel text in total; 33 bytes from __folio_cancel_dirty
and 11 from two callers of cancel_dirty_page().

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: David Howells <dhowells@redhat.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
This commit is contained in:
Matthew Wilcox (Oracle)
2021-03-08 16:43:04 -05:00
parent fc9b6a538b
commit fdaf532a23
3 changed files with 19 additions and 15 deletions
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11
include/linux/pagemap.h
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@@ -785,6 +785,17 @@ static inline void account_page_cleaned(struct page *page,
{
return folio_account_cleaned(page_folio(page), mapping, wb);
}
void __folio_cancel_dirty(struct folio *folio);
static inline void folio_cancel_dirty(struct folio *folio)
{
/* Avoid atomic ops, locking, etc. when not actually needed. */
if (folio_test_dirty(folio))
__folio_cancel_dirty(folio);
}
static inline void cancel_dirty_page(struct page *page)
{
folio_cancel_dirty(page_folio(page));
}
int __set_page_dirty_nobuffers(struct page *page);
int __set_page_dirty_no_writeback(struct page *page);