linux-kernel - Re: [PATCH v5 RESEND 14/17] mm/ioremap: Consider IOREMAP space in generic ioremap

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Message-ID: <ZGg++JKsQh/tOZHI@MiWiFi-R3L-srv>
Date:   Sat, 20 May 2023 11:31:04 +0800
From:   Baoquan He <bhe@...hat.com>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
        linux-mm@...ck.org, arnd@...db.de, christophe.leroy@...roup.eu,
        agordeev@...ux.ibm.com, wangkefeng.wang@...wei.com,
        schnelle@...ux.ibm.com, David.Laight@...lab.com, shorne@...il.com,
        willy@...radead.org, deller@....de
Subject: Re: [PATCH v5 RESEND 14/17] mm/ioremap: Consider IOREMAP space in
 generic ioremap

On 05/16/23 at 11:44pm, Christoph Hellwig wrote:
> On Tue, May 16, 2023 at 11:41:26PM -0700, Christoph Hellwig wrote:
> > I think this would be cleaner if we'd just always use
> > __get_vm_area_caller and at the top of the file add a:
> > 
> > #ifndef IOREMAP_START
> > #define IOREMAP_START	VMALLOC_START
> > #define IOREMAP_END	VMALLOC_END
> > #endif
> > 
> > Together with a little comment that ioremap often, but not always
> > uses the generic vmalloc area.
> 
> .. and with that we can also simply is_ioremap_addr by moving it
> to ioremap.c and making it always operate on the IOREMAP constants.

Great idea too, will do. Put this into a separate patch?