linux-kernel - Re: [dm-devel] [PATCH -next] md: dm-ebs-target: fix build errors & Kconfig entry

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Message-ID: <f78d654d-3f98-151d-bc16-bf31a6547a66@infradead.org>
Date:   Wed, 29 Apr 2020 07:52:00 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Heinz Mauelshagen <heinzm@...hat.com>,
        LKML <linux-kernel@...r.kernel.org>, dm-devel@...hat.com
Cc:     Mike Snitzer <snitzer@...hat.com>, Alasdair Kergon <agk@...hat.com>
Subject: Re: [dm-devel] [PATCH -next] md: dm-ebs-target: fix build errors &
 Kconfig entry

On 4/29/20 5:23 AM, Heinz Mauelshagen wrote:
> On 4/28/20 5:03 PM, Randy Dunlap wrote:
>> From: Randy Dunlap <rdunlap@...radead.org>
>>
>> Fix build errors by selecting DM_BUFIO.
>>
>> Fix Kconfig entry formatting by using tabs instead of spaces,
>> using "help" instead of "---help---", and
>> indenting help text with one additional space.
>>
>> Fixes these build errors:
>>
>> ld: drivers/md/dm-ebs-target.o: in function `__ebs_forget_bio':
>> dm-ebs-target.c:(.text+0x1bc): undefined reference to `dm_bufio_forget'
>> ld: drivers/md/dm-ebs-target.o: in function `ebs_dtr':
>> dm-ebs-target.c:(.text+0x2fe): undefined reference to `dm_bufio_client_destroy'
>> ld: drivers/md/dm-ebs-target.o: in function `__ebs_rw_bio':
>> dm-ebs-target.c:(.text+0x4c4): undefined reference to `dm_bufio_get_block_size'
>> ld: dm-ebs-target.c:(.text+0x4f1): undefined reference to `dm_bufio_read'
>> ld: dm-ebs-target.c:(.text+0x504): undefined reference to `dm_bufio_get_block_size'
>> ld: dm-ebs-target.c:(.text+0x519): undefined reference to `dm_bufio_new'
>> ld: dm-ebs-target.c:(.text+0x567): undefined reference to `dm_bufio_mark_partial_buffer_dirty'
>> ld: dm-ebs-target.c:(.text+0x56f): undefined reference to `dm_bufio_release'
>> ld: drivers/md/dm-ebs-target.o: in function `__ebs_process_bios':
>> dm-ebs-target.c:(.text+0x6bf): undefined reference to `dm_bufio_prefetch'
>> ld: dm-ebs-target.c:(.text+0x72d): undefined reference to `dm_bufio_prefetch'
>> ld: dm-ebs-target.c:(.text+0x783): undefined reference to `dm_bufio_prefetch'
>> ld: dm-ebs-target.c:(.text+0x7fe): undefined reference to `dm_bufio_write_dirty_buffers'
>> ld: drivers/md/dm-ebs-target.o: in function `ebs_ctr':
>> dm-ebs-target.c:(.text+0xa82): undefined reference to `dm_bufio_client_create'
>>
>> Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
>> Cc: Heinz Mauelshagen <dm-devel@...hat.com>
>> Cc: Alasdair Kergon <agk@...hat.com>
>> Cc: Mike Snitzer <snitzer@...hat.com>
>> Cc: dm-devel@...hat.com
>> ---
>>   drivers/md/Kconfig |   12 ++++++------
>>   1 file changed, 6 insertions(+), 6 deletions(-)
>>
>> --- linux-next-20200428.orig/drivers/md/Kconfig
>> +++ linux-next-20200428/drivers/md/Kconfig
>> @@ -338,12 +338,12 @@ config DM_WRITECACHE
>>          to be cached in standard RAM.
>>     config DM_EBS
>> -       tristate "Emulated block size target (EXPERIMENTAL)"
>> -       depends on BLK_DEV_DM
>> -       default n
>> -       ---help---
>> -     dm-ebs emulates smaller logical block size on backing devices
>> -     with larger ones (e.g. 512 byte sectors on 4K native disks).
>> +    tristate "Emulated block size target (EXPERIMENTAL)"
>> +    depends on BLK_DEV_DM
>> +    select DM_BUFIO
>> +    help
>> +      dm-ebs emulates smaller logical block size on backing devices
>> +      with larger ones (e.g. 512 byte sectors on 4K native disks).
>>     config DM_ERA
>>          tristate "Era target (EXPERIMENTAL)"
> 
> 
> Thanks, fine with me for the most part.
> 
> We mainly use '---help---' for dm/md though, so lets's keep it. Mike?
> 
> Heinz

Sure, you can keep it for now, but it is being phased out.

thanks.
-- 
~Randy