Re: [PATCH] include: Remove pagemap.h from blkdev.h

[Arnd Bergmann]

On Tue, Mar 9, 2021 at 7:15 PM Matthew Wilcox (Oracle)
<willy@xxxxxxxxxxxxx> wrote:
>
> My UEK-derived config has 1030 files depending on pagemap.h before
> this change.  Afterwards, just 240 files need to be rebuilt when I
> touch pagemap.h.  I think blkdev.h is probably included too widely,
> but untangling that dependency is harder and this solves my problem.
> x86 allmodconfig builds, but there may be implicit include problems
> on other architectures.
>
> Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>

Good catch!

With the build regression fixed (I suppose you now need to include
pagemap.h in swap.h):

Acked-by: Arnd Bergmann <arnd@xxxxxxxx>