Re: [PATCH v7 8/8] mm: Renumber FOLL_GET and FOLL_PIN down

[Matthew Wilcox]

On Fri, Jan 20, 2023 at 05:55:56PM +0000, David Howells wrote:
> Renumber FOLL_GET and FOLL_PIN down to bit 0 and 1 respectively so that
> they are coincidentally the same as BIO_PAGE_REFFED and BIO_PAGE_PINNED and
> also so that they can be stored in the bottom two bits of a page pointer
> (something I'm looking at for zerocopy socket fragments).
> 
> Signed-off-by: David Howells <dhowells@xxxxxxxxxx>

Reviewed-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>

Although I was hoping you'd renumber some of the others since we
currently have gaps at 0x200, 0x400, 0x1000, and 0x4000 as well
as the 0x40 you're using here.