Re: [PATCHv2 1/2] mm: eliminate ifdef of HAVE_IOREMAP_PROT in .c files

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To: Wang Wenhu <wenhu.wang@xxxxxxxxxxx>
Subject: Re: [PATCHv2 1/2] mm: eliminate ifdef of HAVE_IOREMAP_PROT in .c files
From: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Date: Tue, 14 Jun 2022 23:49:10 -0700
Cc: gregkh@xxxxxxxxxxxxxxxxxxx, arnd@xxxxxxxx, hao.wu@xxxxxxxxx, trix@xxxxxxxxxx, mdf@xxxxxxxxxx, yilun.xu@xxxxxxxxx, bhelgaas@xxxxxxxxxx, akpm@xxxxxxxxxxxxxxxxxxxx, linux-fpga@xxxxxxxxxxxxxxx, linux-pci@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, christophe.leroy@xxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linuxppc-dev@xxxxxxxxxxxxxxxx, mpe@xxxxxxxxxxxxxx
In-reply-to: <SG2PR01MB295111ED8F547B9F99DB9FA99FAD9@SG2PR01MB2951.apcprd01.prod.exchangelabs.com>
References: <YqHy1uXwCLlJmftr@kroah.com> <20220615055735.53585-1-wenhu.wang@hotmail.com> <SG2PR01MB295111ED8F547B9F99DB9FA99FAD9@SG2PR01MB2951.apcprd01.prod.exchangelabs.com>

Did you verify that all architectures actually provide a ioremap_prot
prototype?
The header situation for ioremap* is a mess unfortunately.

References:
- [PATCHv2 1/2] mm: eliminate ifdef of HAVE_IOREMAP_PROT in .c files
  - From: Wang Wenhu

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