Commit cf1d3417 authored by Matthew Wilcox (Oracle)'s avatar Matthew Wilcox (Oracle) Committed by Andrew Morton
Browse files

buffer: use b_folio in mark_buffer_dirty() 

Removes about four calls to compound_head().  Two of them are inline which
removes 132 bytes from the kernel text.

Link: https://lkml.kernel.org/r/20221215214402.3522366-8-willy@infradead.org


Signed-off-by: default avatarMatthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: default avatarJan Kara <jack@suse.cz>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent c10d9119

fs/buffer.c

+6 −6
Original line number Diff line number Diff line
@@ -1095,16 +1095,16 @@ void mark_buffer_dirty(struct buffer_head *bh) 
	}



	if (!test_set_buffer_dirty(bh)) {

		struct page *page = bh->b_page;

		struct folio *folio = bh->b_folio;

		struct address_space *mapping = NULL;



		lock_page_memcg(page);

		if (!TestSetPageDirty(page)) {

			mapping = page_mapping(page);

		folio_memcg_lock(folio);

		if (!folio_test_set_dirty(folio)) {

			mapping = folio->mapping;

			if (mapping)

				__set_page_dirty(page, mapping, 0);

				__folio_mark_dirty(folio, mapping, 0);

		}

		unlock_page_memcg(page);

		folio_memcg_unlock(folio);

		if (mapping)

			__mark_inode_dirty(mapping->host, I_DIRTY_PAGES);

	}