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    SubjectRe: [PATCH] bootup: Add built-in kernel command line for x86
    Matt Mackall wrote:
    > On Wed, 2008-08-06 at 15:48 -0700, H. Peter Anvin wrote:
    >> Tim Bird wrote:
    >>> One difficulty is that the other arches' command lines
    >>> are not currently "broken", so there's no real incentive
    >>> to change them.
    >>> The only thing novel thing I'm adding here is the addition of
    >>> the leading '!' to allow for an override. This is needed
    >>> in some x86 cases I'm familiar with, but I've haven't seen
    >>> any cases where it would be useful for other arches.
    >>> (not to say they don't exist - I just haven't seen them.)
    >> Note that it could just as easily be done with a CONFIG_CMDLINE_OVERRIDE
    >> option, since the initial reason for a magic character was to be able to
    >> provide both prefix and suffix splicing.
    > You're right, I had forgotten about the suffix splicing and my brain is
    > a bit foggy on what motivated it.

    Well, prefix = bootloader overrides; suffix = builtin overrides.

    >> CONFIG_CMDLINE_OVERRIDE is probably more palatable to other architectures.
    > Yes, though I doubt we're in danger of introducing any real backwards
    > compatibility issues with the magic '!' at the beginning.

    Well, it does if we want to make this a generic feature, which I believe
    we should.


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