[PATCH v6 16/27] mm/filemap: Add unlock_folio

[Christoph Hellwig]

On Wed, Mar 31, 2021 at 07:47:17PM +0100, Matthew Wilcox (Oracle) wrote:
> Convert unlock_page() to call unlock_folio().  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 24 bytes of text for the
> kernel as a whole, but any path that uses unlock_folio() will execute
> 4 fewer instructions.

Looks good,

Reviewed-by: Christoph Hellwig <hch at lst.de>