linux-kernel - Re: 回复: [PATCH 2/2] uio:powerpc:mpc85xx: l2-cache-sram uio driver implementation

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Message-ID: <304d0f87-a7d9-2db1-020d-f864cab52a23@csgroup.eu>
Date:   Wed, 15 Jun 2022 06:04:01 +0000
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     Wenhu Wang <wenhu.wang@...mail.com>,
        Greg KH <gregkh@...uxfoundation.org>
CC:     "mpe@...erman.id.au" <mpe@...erman.id.au>,
        "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: 回复: [PATCH 2/2] uio:powerpc:mpc85xx: l2-cache-sram uio driver implementation



Le 14/06/2022 à 08:09, Wenhu Wang a écrit :
>>> +
>>> +static const struct vm_operations_struct uio_cache_sram_vm_ops = {
>>> +#ifdef CONFIG_HAVE_IOREMAP_PROT
>>
>> Same here.
>>
> 
> I tried to eliminate it in mainline
> See: [PATCH v2] mm: eliminate ifdef of HAVE_IOREMAP_PROT in .c files
> https://lkml.org/lkml/2022/6/10/695
> 
>>> +     .access = generic_access_phys,
>>> +#endif
>>> +};

Another solution is to do:


static const struct vm_operations_struct uio_cache_sram_vm_ops = {
	.access = IS_ENABLED(CONFIG_HAVE_IOREMAP_PROT) ? generic_access_phys : 
NULL,
};


Christophe