On Tue, 11 Sep 2018 15:34:44 -0700 Omar Sandoval <osandov@xxxxxxxxxxx> wrote:
> From: Omar Sandoval <osandov@xxxxxx>
>
> The SWP_FILE flag serves two purposes: to make swap_{read,write}page()
> go through the filesystem, and to make swapoff() call
> ->swap_deactivate(). For Btrfs, we want the latter but not the former,
> so split this flag into two. This makes us always call
> ->swap_deactivate() if ->swap_activate() succeeded, not just if it
> didn't add any swap extents itself.
>
> This also resolves the issue of the very misleading name of SWP_FILE,
> which is only used for swap files over NFS.
>
Acked-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
