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From: Christophe Leroy <christophe.leroy@csgroup.eu>
To: Wenhu Wang <wenhu.wang@hotmail.com>,
	Greg KH <gregkh@linuxfoundation.org>
Cc: "mpe@ellerman.id.au" <mpe@ellerman.id.au>,
	"linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: 回复: [PATCH 2/2] uio:powerpc:mpc85xx: l2-cache-sram uio driver implementation
Date: Tue, 14 Jun 2022 07:18:48 +0000	[thread overview]
Message-ID: <efebcb50-0481-622a-894c-7000999aacc6@csgroup.eu> (raw)
In-Reply-To: <SG2PR01MB2951EA9ED70E5F766DD26A069FAA9@SG2PR01MB2951.apcprd01.prod.exchangelabs.com>



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
> 

I looked at that patch.

I don't think you can just drop the #ifdef in function 
__access_remote_vm() in mm/memory.c

You have to replace it with something like:

	if (!IS_ENABLED(CONFIG_HAVE_IOREMAP_PROT))
		break;

Christophe

WARNING: multiple messages have this Message-ID (diff)
From: Christophe Leroy <christophe.leroy@csgroup.eu>
To: Wenhu Wang <wenhu.wang@hotmail.com>,
	Greg KH <gregkh@linuxfoundation.org>
Cc: "linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: 回复: [PATCH 2/2] uio:powerpc:mpc85xx: l2-cache-sram uio driver implementation
Date: Tue, 14 Jun 2022 07:18:48 +0000	[thread overview]
Message-ID: <efebcb50-0481-622a-894c-7000999aacc6@csgroup.eu> (raw)
In-Reply-To: <SG2PR01MB2951EA9ED70E5F766DD26A069FAA9@SG2PR01MB2951.apcprd01.prod.exchangelabs.com>



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
> 

I looked at that patch.

I don't think you can just drop the #ifdef in function 
__access_remote_vm() in mm/memory.c

You have to replace it with something like:

	if (!IS_ENABLED(CONFIG_HAVE_IOREMAP_PROT))
		break;

Christophe

  parent reply	other threads:[~2022-06-14  7:19 UTC|newest]

Thread overview: 52+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20220609102855.272270-1-wenhu.wang@hotmail.com>
2022-06-09 10:28 ` [PATCH 1/2] powerpc:mm: export symbol ioremap_coherent Wang Wenhu
2022-06-09 10:28   ` Wang Wenhu
2022-06-14 10:45   ` Michael Ellerman
2022-06-14 14:49     ` Christoph Hellwig
2022-06-14 14:49       ` Christoph Hellwig
2022-06-15  4:37     ` 回复: " Wenhu Wang
2022-06-09 10:28 ` [PATCH 2/2] uio:powerpc:mpc85xx: l2-cache-sram uio driver implementation Wang Wenhu
2022-06-09 10:28   ` Wang Wenhu
2022-06-09 13:17   ` Greg KH
2022-06-09 13:17     ` Greg KH
2022-06-14  6:09     ` 回复: " Wenhu Wang
2022-06-14  6:09       ` Wenhu Wang
2022-06-14  6:34       ` Greg KH
2022-06-14  6:34         ` Greg KH
2022-06-14  7:12         ` Christophe Leroy
2022-06-14  7:12           ` Christophe Leroy
2022-06-14  7:18       ` Christophe Leroy [this message]
2022-06-14  7:18         ` Christophe Leroy
2022-06-14  7:26         ` Christophe Leroy
2022-06-14  7:26           ` Christophe Leroy
2022-06-14  7:53           ` Wenhu Wang
2022-06-14  7:53             ` Wenhu Wang
2022-06-14  8:03             ` Greg KH
2022-06-14  8:03               ` Greg KH
2022-06-14  8:39               ` Wenhu Wang
2022-06-14  8:39                 ` Wenhu Wang
2022-06-14 14:40             ` Wenhu Wang
2022-06-14 14:40               ` Wenhu Wang
2022-06-14 14:59               ` Christophe Leroy
2022-06-14 14:59                 ` Christophe Leroy
2022-06-15  6:04       ` 回复: " Christophe Leroy
2022-06-15  6:04         ` Christophe Leroy
2022-06-15  5:57     ` [PATCHv2 0/2] uio:powerpc:mpc85xx: l2-cache-sram uio driver Wang Wenhu
2022-06-15  5:57       ` Wang Wenhu
     [not found]     ` <20220615055735.53585-1-wenhu.wang@hotmail.com>
2022-06-15  5:57       ` [PATCHv2 1/2] mm: eliminate ifdef of HAVE_IOREMAP_PROT in .c files Wang Wenhu
2022-06-15  5:57         ` Wang Wenhu
2022-06-15  6:49         ` Christoph Hellwig
2022-06-15  6:49           ` Christoph Hellwig
2022-06-22  2:22         ` kernel test robot
2022-06-22  2:22           ` kernel test robot
2022-06-22  4:13         ` kernel test robot
2022-06-22  4:13           ` kernel test robot
2022-06-15  5:57       ` [PATCHv2 2/2] uio:powerpc:mpc85xx: l2-cache-sram uio driver implementation Wang Wenhu
2022-06-15  5:57         ` Wang Wenhu
2022-06-15  6:43         ` Christoph Hellwig
2022-06-15  6:43           ` Christoph Hellwig
2022-06-15  6:48         ` Christophe Leroy
2022-06-15  6:48           ` Christophe Leroy
2022-06-15  6:49         ` Christophe Leroy
2022-06-15  6:49           ` Christophe Leroy
2022-06-14 14:51   ` [PATCH " Christoph Hellwig
2022-06-14 14:51     ` Christoph Hellwig

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