Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Subject: Re: [PATCH 0/3] Remove scsi_cmnd.tag
To:     Bart Van Assche <bvanassche@acm.org>,
        John Garry <john.garry@huawei.com>,
        "Martin K. Petersen" <martin.petersen@oracle.com>
Cc:     satishkh@cisco.com, sebaddel@cisco.com, kartilak@cisco.com,
        jejb@linux.ibm.com, linux-scsi@vger.kernel.org,
        linux-kernel@vger.kernel.org, hch@lst.de
References: <1628862553-179450-1-git-send-email-john.garry@huawei.com>
 <yq14kbppa42.fsf@ca-mkp.ca.oracle.com>
 <176ce4f2-42c9-bba6-c8f9-70a08faa21b8@huawei.com>
 <e0d7ba32-2999-794e-2ccb-fdba2c847eb1@acm.org>
From:   Hannes Reinecke <hare@suse.de>
Message-ID: <038ec0c6-92c9-0f2a-7d81-afb91b8343af@suse.de>
Date:   Thu, 19 Aug 2021 09:15:38 +0200
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101
 Thunderbird/78.12.0
MIME-Version: 1.0
In-Reply-To: <e0d7ba32-2999-794e-2ccb-fdba2c847eb1@acm.org>
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Language: en-US
Content-Transfer-Encoding: 8bit
Precedence: bulk

Hey Bart,

Thanks for this!
Really helpful.

Just a tiny wee snag:

On 8/19/21 4:41 AM, Bart Van Assche wrote:
> On 8/18/21 11:08 AM, John Garry wrote:
>> Or maybe you or Bart have a better idea?
> 
> This is how I test compilation of SCSI drivers on a SUSE system (only
> the cross-compilation prefix is distro specific):
> 
>      # Acorn RiscPC
>      make ARCH=arm xconfig
>      # Select the RiscPC architecture (ARCH_RPC)
>      make -j9 ARCH=arm CROSS_COMPILE=arm-suse-linux-gnueabi- </dev/null
> 

Acorn RiscPC is ARMv3, which sadly isn't supported anymore with gcc9.
So for compilation I had to modify Kconfig to select ARMv4:

diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig
index 8355c3895894..22ec9e275335 100644
--- a/arch/arm/mm/Kconfig
+++ b/arch/arm/mm/Kconfig
@@ -278,7 +278,7 @@ config CPU_ARM1026
  # SA110
  config CPU_SA110
         bool
-       select CPU_32v3 if ARCH_RPC
+       select CPU_32v4 if ARCH_RPC
         select CPU_32v4 if !ARCH_RPC
         select CPU_ABRT_EV4
         select CPU_CACHE_V4WB

Cheers,

Hannes
-- 
Dr. Hannes Reinecke                Kernel Storage Architect
hare@suse.de                              +49 911 74053 688
SUSE Software Solutions GmbH, Maxfeldstr. 5, 90409 Nürnberg
HRB 36809 (AG Nürnberg), Geschäftsführer: Felix Imendörffer