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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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7
include/linux/mm.h
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@@ -2008,13 +2008,6 @@ int redirty_page_for_writepage(struct writeback_control *wbc,
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)
{
/* Avoid atomic ops, locking, etc. when not actually needed. */
if (PageDirty(page))
__cancel_dirty_page(page);
}
int clear_page_dirty_for_io(struct page *page);
int get_cmdline(struct task_struct *task, char *buffer, int buflen);