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SubjectRe: [PATCH v2] include: Remove pagemap.h from blkdev.h
On Tue, Mar 09, 2021 at 07:57:47PM +0000, Matthew Wilcox (Oracle) wrote:
> My UEK-derived config has 1030 files depending on pagemap.h before
> this change. Afterwards, just 326 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@infradead.org>
> ---
> v2: Fix CONFIG_SWAP=n implicit use of pagemap.h by swap.h. Increases
> the number of files from 240, but that's still a big win -- 68%
> reduction instead of 77%.

Looks good. I suspect blkdev.h also has penty of other includes that
aren't needed either..

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

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