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    SubjectRe: [PATCH] Futexes IV (Fast Lightweight Userspace Semaphores)
    On Sun, 10 Mar 2002 19:41:36 +0000 (UTC) (Linus Torvalds) wrote:

    > And no, it's not worth discontinuing i386 support. It just isn't
    > painful enough to maintain.

    How about just dropping 386 + SMP support?

    Then it would be a nobrainer to have cmpxchg a generic operation, AND
    export it to userspace in the proposed "kernel routine page".

    diff -urN -I \$.*\$ --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal linux-2.5.6/arch/i386/ working-2.5.6-futex-6/arch/i386/
    --- linux-2.5.6/arch/i386/ Wed Feb 20 17:56:59 2002
    +++ working-2.5.6-futex-6/arch/i386/ Sat Mar 9 15:17:18 2002
    @@ -177,7 +177,9 @@

    bool 'Math emulation' CONFIG_MATH_EMULATION
    bool 'MTRR (Memory Type Range Register) support' CONFIG_MTRR
    -bool 'Symmetric multi-processing support' CONFIG_SMP
    +if [ "$CONFIG_M386" != "y" ]; then
    + bool 'Symmetric multi-processing support' CONFIG_SMP
    bool 'Preemptible Kernel' CONFIG_PREEMPT
    if [ "$CONFIG_SMP" != "y" ]; then
    bool 'Local APIC support on uniprocessors' CONFIG_X86_UP_APIC
    Anyone who quotes me in their sig is an idiot. -- Rusty Russell.
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