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    SubjectRe: obsolete code must die
    Cleanup is a nice idea , but Linux should support old hardware and should
    not affect them in any way.


    ----- Original Message -----
    From: "Daniel" <>
    To: "Linux kernel" <>
    Sent: Wednesday, June 13, 2001 5:44 PM
    Subject: obsolete code must die

    > Anyone concerned about the current size of the kernel source code? I am,
    > I propose to start cleaning house on the x86 platform. I mean it's all
    > well and good to keep adding features, but stuff needs to go if kernel
    > development is to move forward. Before listing the gunk I want to get rid
    > of, here's my justification for doing so:
    > -- Getting rid of old code can help simplify the kernel. This means less
    > chance of bugs.
    > -- Simplifying the kernel means that it will be easier for newbies to
    > understand and perhaps contribute.
    > -- a simpler, cleaner kernel will also be of more use in an academic
    > environment.
    > -- a smaller kernel is easier to maintain and is easier to re-architect
    > should the need arise.
    > -- If someone really needs support for this junk, they will always have
    > option of using the 2.0.x, 2.2.x or 2.4.x series.
    > So without further ado here're the features I want to get rid of:
    > i386, i486
    > The Pentium processor has been around since 1995. Support for these older
    > processors should go so we can focus on optimizations for the pentium and
    > better processors.
    > math-emu
    > If support for i386 and i486 is going away, then so should math emulation.
    > Every intel processor since the 486DX has an FPU unit built in. In fact
    > shouldn't FPU support be a userspace responsibility anyway?
    > ISA bus, MCA bus, EISA bus
    > PCI is the defacto standard. Get rid of CONFIG_BLK_DEV_ISAPNP,
    > CONFIG_ISAPNP, etc
    > ISA, MCA, EISA device drivers
    > If support for the buses is gone, there's no point in supporting devices
    > these buses.
    > all code marked as CONFIG_OBSOLETE
    > Since we're cleaning house we may as well get rid of this stuff.
    > MFM/RLL/XT/ESDI hard drive support
    > Does anyone still *have* an RLL drive that works? At the very least get
    > of the old driver (eg CONFIG_BLK_DEV_HD_ONLY, CONFIG_BLK_DEV_HD_IDE,
    > parallel/serial/game ports
    > More controversial to remove this, since they are *still* in pretty wide
    > use -- but USB and IEEE 1394 are the way to go. No ifs ands or buts.
    > a.out
    > Who needs it anymore. I love ELF.
    > I really think doing a clean up is worthwhile. Maybe while looking for
    > to clean up we'll even be able to better comment the existing code. Any
    > other features people would like to get rid of? Any comments or
    > I'd love to start a good discussion about this going so please send me
    > 2 cents.
    > Daniel
    > -
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