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    SubjectRe: [10 PATCHES] inline functions to avoid stack overflow
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    From: "Bart Van Assche" <bart.vanassche@gmail.com>
    Date: Thu, 26 Jun 2008 08:32:35 +0200

    > On Thu, Jun 26, 2008 at 12:09 AM, David Miller <davem@davemloft.net> wrote:
    > > The extra 16 bytes of space allocated is so that GCC can perform a
    > > secondary reload of a quad floating point value. It always has to be
    > > present, because we can't satisfy a secondary reload by emitting yet
    > > another reload, it's the end of the possible level of recursions
    > > allowed by the reload pass.
    >
    > Is there any floating-point code present in the Linux kernel ?

    Yes, but not coming from C compiled code. Floating point is
    used in most of the memcpy/memset implementations of the
    sparc64 kernel.

    > Would it be a good idea to add an option to gcc that tells gcc that
    > the compiled code does not contain floating-point instructions, such
    > that gcc knows that no space has to be provided for a quad floating
    > point value ?

    I think it exists already, it's called -mno-fpu :-)


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