linux-kernel - Re: sata & scsi suggestion for make menuconfig

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Date:	Sat, 08 Sep 2007 09:31:47 -0700
From:	Randy Dunlap <randy.dunlap@...cle.com>
To:	Stefan Richter <stefanr@...6.in-berlin.de>
CC:	Folkert van Heusden <folkert@...heusden.com>,
	linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org
Subject: Re: sata & scsi suggestion for make menuconfig

Stefan Richter wrote:
> (added Cc linux-ide)
> 
> Folkert van Heusden wrote:
>>>>> A popup makes some sense, but I don't know if menuconfig knows how to
>>>>> do popup warnings... and it needs to be done for all *configs,
>>>>> not just menuconfig.
>>>> Maybe add a new type?
>>> How about
>>> comment "Note: 'SCSI disk support' is required for SATA/PATA HDDs!"
>>> 	depends on ATA && !BLK_DEV_SD
>> Yes! Maybe create some status-line at the bottom of the screen in which
>> these hints scrollby. Like powertop does.
> 
> 'comment' is already supported by make {menu,x,g}config and AFAIK by
> make oldconfig too.  It is not effective in make oldconfig though
> because it will scroll off the screen quickly.
> 
> I am not a friend of 'select', but maybe the following actually helps.
> I didn't follow all of this and previous related discussions, so I guess
> somebody else suggested something like this before:
> 

The problem with 'select' here is that it will enable BLK_DEV_SD,
but if SCSI is not enabled, it will not become enabled -- i.e.,
select does not follow the dependency chain.  So usually the
kernel will not build unless SCSI is enabled by the user.

> # drivers/ata/Kconfig
> 
> config ATA
> 	[...]
> 
> comment "Controller drivers"
> 
> [...low-level drivers go here...]
> 
> comment "Storage device drivers"
> 
> config ATA_SD
> 	tristate "SATA/PATA HDD support (via SCSI disk support)"
> 	depends on ATA
> 	select BLK_DEV_SD
> 	help
> 	  'SCSI disk support' is required to access SATA HDDs.  It is
> 	  also necessary for parallel ATA (IDE) HDDs if you use the
> 	  experimental parallel ATA option.
> 
> 	  You can say Y or M here to select SCSI disk support, or you
> 	  can do so in the 'SCSI device support' section.
> 
> [...ditto for CD/DVD-ROMs, tapes, and generic support...]


-- 
~Randy
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