On Thu, Jul 15, 2021 at 04:35:03AM +0100, Matthew Wilcox (Oracle) wrote: > Convert unlock_page() to call folio_unlock(). By using a folio we > avoid a call to compound_head(). This shortens the function from 39 > bytes to 25 and removes 4 instructions on x86-64. Because we still > have unlock_page(), it's a net increase of 16 bytes of text for the > kernel as a whole, but any path that uses folio_unlock() will execute > 4 fewer instructions. > > Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx> > Reviewed-by: Christoph Hellwig <hch@xxxxxx> > Acked-by: Jeff Layton <jlayton@xxxxxxxxxx> > Acked-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx> > Reviewed-by: William Kucharski <william.kucharski@xxxxxxxxxx> > Reviewed-by: David Howells <dhowells@xxxxxxxxxx> > --- > include/linux/pagemap.h | 3 ++- > mm/filemap.c | 29 ++++++++++++----------------- > mm/folio-compat.c | 6 ++++++ > 3 files changed, 20 insertions(+), 18 deletions(-) Acked-by: Mike Rapoport <rppt@xxxxxxxxxxxxx>
