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On Sun, Oct 28, 2012 at 1:23 PM, Alan Mackenzie <acm@×××.de> wrote: |
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> Hello, Canek. |
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> |
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> On Sun, Oct 28, 2012 at 12:16:56PM -0600, Canek Peláez Valdés wrote: |
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>> On Sun, Oct 28, 2012 at 11:48 AM, Alan Mackenzie <acm@×××.de> wrote: |
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> |
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>> > Floppy disk support has been removed from kernel 3.4.9. I'm not very |
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>> > happy about this. Does anybody know why, or by whom? |
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> |
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>> Nobody removed anything; it's still there, in 3.6.3. I'm not using it, |
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>> but I can select it without problems. |
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> |
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>> > This removal has been done in a somewhat peculiar manner. The config |
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>> > option was called CONFIG_BLK_DEV_FD, and used to be at <Device |
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>> > Drivers>/<Block Devices>. It is now not visible there. |
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> |
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>> It's visible here. |
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> |
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>> > However, Typing '/' BLK_DEV_FD in 'make menuconfig' returns its |
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>> > documentation, saying BLK_DEV_FD is dependent upon |
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>> > CONFIG_ARCH_MAY_HAVE_PC_FDC. This latter variable isn't visible |
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>> > anywhere. |
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> |
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>> It's defined for you if the ARCHitecture (as the name implies) |
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>> supports floppies. It's set =y in all my kernels. |
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> |
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> But, what does the "architecture" actually mean? |
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x86, ARM. As far as I know, in ARM you can only have floppies if you |
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connect an USB drive to it. So BLK_DEV_FD has no point in ARM. I |
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suppose the IBM s/390 mainframe computer doesn't use floppies either. |
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>> > I tried setting ARCH_MAY_HAVE_PC_FDC by hand in .config, but that didn't |
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>> > help. 'make menuconfig' just unset it again of its own accord. Then I |
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>> > inserted BLK_DEV_FD into .config by hand and built the kernel. I haven't |
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>> > tested it yet. |
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> |
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>> > All this seems rather strange. Why shouldn't I be able to use my floppy |
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>> > drive? |
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> |
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>> Your kernel config/setup has something really weird. |
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> |
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> OK. If I start the configuration afresh, I do indeed see the floppy disk |
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> selector. :-) |
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You had a borked configuration, for some reason. |
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>> ARCH_MAY_HAVE_PC_FDC is a boolean variable that it's set automatically |
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>> for you, since it's arch dependant. You cannot set it (nor unset it, |
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>> AFAIK). |
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> |
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> Do you know where the source for 'make menuconfig' is in the source tree? |
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I believe is in scripts, along with kbuild. menuconfig is one of |
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several frontends to the build system. |
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>> May I recommend to completely uninstall your sources package and |
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>> delete /usr/src/linux (after a proper backup, of course), install them |
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>> again, and do a make oldconfig (after restoring your old .config)? |
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> |
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> By starting again from scratch, it seems clear that the problem is in |
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> some of the config options I have selected. |
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I thought that would help. |
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>> Because ARCH_MAY_HAVE_PC_FDC is something you should not to even think about. |
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> |
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> I agree with you there. ;-) |
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Regards. |
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-- |
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Canek Peláez Valdés |
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Posgrado en Ciencia e Ingeniería de la Computación |
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Universidad Nacional Autónoma de México |
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