linux-kernel - Re: [PATCH v2 01/28] csky,sparc: Declare flush_dcache

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Message-ID: <YYozKaEXemjKwEar@infradead.org>
Date:   Tue, 9 Nov 2021 00:36:57 -0800
From:   Christoph Hellwig <hch@...radead.org>
To:     "Matthew Wilcox (Oracle)" <willy@...radead.org>
Cc:     "Darrick J . Wong " <djwong@...nel.org>, linux-xfs@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-block@...r.kernel.org, Jens Axboe <axboe@...nel.dk>,
        Christoph Hellwig <hch@...radead.org>
Subject: Re: [PATCH v2 01/28] csky,sparc: Declare flush_dcache_folio()

On Mon, Nov 08, 2021 at 04:05:24AM +0000, Matthew Wilcox (Oracle) wrote:
> These architectures do not include asm-generic/cacheflush.h so need
> to declare it themselves.

In mainline mm/util.c implements flush_dcache_folio unless
ARCH_IMPLEMENTS_FLUSH_DCACHE_FOLIO is set.  So I think you need to
define that for csky and sparc.