root@dub:/usr/src/linux-2.6# git bisect good
5d8b34fdcb384161552d01ee8f34af5ff11f9684 is first bad commit
commit 5d8b34fdcb384161552d01ee8f34af5ff11f9684
Author: Thomas Gleixner <tglx@linutronix.de>
Date:   Fri Feb 16 01:27:43 2007 -0800

    [PATCH] clocksource: Add verification (watchdog) helper
    
    The TSC needs to be verified against another clocksource.  Instead of using
    hardwired assumptions of available hardware, provide a generic verification
    mechanism.  The verification uses the best available clocksource and handles
    the usability for high resolution timers / dynticks of the clocksource which
    needs to be verified.
    
    Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
    Signed-off-by: Ingo Molnar <mingo@elte.hu>
    Cc: john stultz <johnstul@us.ibm.com>
    Cc: Roman Zippel <zippel@linux-m68k.org>
    Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
    Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

:040000 040000 62dc665aebadaa1bdb948959a718162b88e1ff68 605d2b2d55e0b0edc4b26580d700f64fb878753a M      arch
:040000 040000 ce257f3585445396942b4bb35d4fd23c44ab4bb1 5ace8e9bd9e9806ce468d7e8dec2db4f9052ed5e M      include
:040000 040000 dfca91fe8a0b3ee7de842b4dd3451220634516f1 4c2ec00e90009d296f44f3e0b89c50e43336c6bc M      kernel
root@dub:/usr/src/linux-2.6#