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Date:   Tue, 14 Jun 2022 23:49:10 -0700
From:   Christoph Hellwig <hch@infradead.org>
To:     Wang Wenhu <wenhu.wang@hotmail.com>
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Subject: Re: [PATCHv2 1/2] mm: eliminate ifdef of HAVE_IOREMAP_PROT in .c
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Did you verify that all architectures actually provide a ioremap_prot
prototype?
The header situation for ioremap* is a mess unfortunately.