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mm/writeback: Add folio_mark_dirty()

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Reimplement set_page_dirty() as a wrapper around folio_mark_dirty().
There is no change to filesystems as they were already being called
with the compound_head of the page being marked dirty.  We avoid
several calls to compound_head(), both statically (through
using folio_test_dirty() instead of PageDirty() and dynamically by
calling folio_mapping() instead of page_mapping().

Also return bool instead of int to show the range of values actually
returned, and add kernel-doc.

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) 2021-04-26 23:53:10 -04:00
parent f143f1ea5a
commit b5e84594ca
3 changed files with 27 additions and 17 deletions
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3
include/linux/mm.h
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@ -2008,7 +2008,8 @@ int redirty_page_for_writepage(struct writeback_control *wbc,
struct page *page);
void account_page_cleaned(struct page *page, struct address_space *mapping,
struct bdi_writeback *wb);
int set_page_dirty(struct page *page);
bool folio_mark_dirty(struct folio *folio);
bool set_page_dirty(struct page *page);
int set_page_dirty_lock(struct page *page);
void __cancel_dirty_page(struct page *page);
static inline void cancel_dirty_page(struct page *page)