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    SubjectRe: [PATCH v9 09/10] tracing: reserve $12(t0) for mcount-ra-address of gcc 4.5
    On Fri, Nov 20, 2009 at 08:34:37PM +0800, Wu Zhangjin wrote:

    > From: Wu Zhangjin <wuzhangjin@gmail.com>
    >
    > A new option -mmcount-ra-address for gcc 4.5 have been sent by David
    > Daney <ddaney@caviumnetworks.com> in the thread "MIPS: Add option to
    > pass return address location to _mcount", which help to record the
    > location of the return address(ra) for the function graph tracer of MIPS
    > to hijack the return address easier and safer. that option used the
    > $12(t0) register by default, so, we reserve it for it, and use t1,t2,t3
    > instead of t0,t1,t2.
    >
    > Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>

    Queued for 2.6.33 but due to patch 3/3 I won't propagate this series
    immediately to linux-next.

    Thanks!

    Ralf


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