kernel/linux.git/mm/folio-compat.c, branch v5.18

mm/rmap: Convert rmap_walk() to take a folio

2022-03-21T17:01:35+00:00

This ripples all the way through to every calling and called function from rmap. Signed-off-by: Matthew Wilcox (Oracle)

mm/rmap: Turn page_lock_anon_vma_read() into folio_lock_anon_vma_read()

2022-03-21T17:01:35+00:00

Add back page_lock_anon_vma_read() as a wrapper. This saves a few calls to compound_head(). If any callers were passing a tail page before, this would have failed to lock the anon VMA as page->mapping is not valid for tail pages. Signed-off-by: Matthew Wilcox (Oracle)

mm: Turn putback_lru_page() into folio_putback_lru()

2022-03-21T16:59:01+00:00

Add a putback_lru_page() wrapper. Removes a couple of compound_head() calls. Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: Christoph Hellwig

mm: Turn isolate_lru_page() into folio_isolate_lru()

2022-03-21T16:56:36+00:00

Add isolate_lru_page() as a wrapper around isolate_lru_folio(). TestClearPageLRU() would have always failed on a tail page, so returning -EBUSY is the same behaviour. Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: Christoph Hellwig Reviewed-by: John Hubbard Reviewed-by: Jason Gunthorpe Reviewed-by: William Kucharski

filemap: Add filemap_release_folio()

2022-01-04T18:15:34+00:00

Reimplement try_to_release_page() as a wrapper around filemap_release_folio(). Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: Christoph Hellwig Reviewed-by: William Kucharski

filemap: Add filemap_remove_folio and __filemap_remove_folio

2022-01-04T18:15:33+00:00

Reimplement __delete_from_page_cache() as a wrapper around __filemap_remove_folio() and delete_from_page_cache() as a wrapper around filemap_remove_folio(). Remove the EXPORT_SYMBOL as delete_from_page_cache() was not used by any in-tree modules. Convert page_cache_free_page() into filemap_free_folio(). Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: Christoph Hellwig Reviewed-by: William Kucharski

mm/filemap: Add FGP_STABLE

2021-10-18T11:49:41+00:00

Allow filemap_get_folio() to wait for writeback to complete (if the filesystem wants that behaviour). This is the folio equivalent of grab_cache_page_write_begin(), which is moved into the folio-compat file as a reminder to migrate all the code using it. This paves the way for getting rid of AOP_FLAG_NOFS once grab_cache_page_write_begin() is removed. Kernel grows by 11 bytes. filemap_get_folio() grows by 33 bytes but grab_cache_page_write_begin() shrinks by 22 bytes to make up for it. Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: David Howells Acked-by: Vlastimil Babka

mm/filemap: Add filemap_get_folio

2021-10-18T11:49:40+00:00

filemap_get_folio() is a replacement for find_get_page(). Turn pagecache_get_page() into a wrapper around __filemap_get_folio(). Remove find_lock_head() as this use case is now covered by filemap_get_folio(). Reduces overall kernel size by 209 bytes. __filemap_get_folio() is 316 bytes shorter than pagecache_get_page() was, but the new pagecache_get_page() wrapper is 99 bytes. Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: David Howells Acked-by: Vlastimil Babka

mm/filemap: Add filemap_add_folio()

2021-10-18T11:49:40+00:00

Convert __add_to_page_cache_locked() into __filemap_add_folio(). Add an assertion to it that (for !hugetlbfs), the folio is naturally aligned within the file. Move the prototype from mm.h to pagemap.h. Convert add_to_page_cache_lru() into filemap_add_folio(). Add a compatibility wrapper for unconverted callers. Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: Christoph Hellwig Reviewed-by: David Howells Acked-by: Vlastimil Babka

mm/lru: Add folio_add_lru()

2021-10-18T11:49:40+00:00

Reimplement lru_cache_add() as a wrapper around folio_add_lru(). Saves 159 bytes of kernel text due to removing calls to compound_head(). Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: Christoph Hellwig Reviewed-by: David Howells Acked-by: Vlastimil Babka