6738200 CPU power management sometimes makes gratuitous xc_call().

[mark.hayw...@sun.com]

Author: Mark Haywood <Mark.Haywood at Sun.COM>
Repository: /hg/onnv/onnv-gate
Latest revision: f9a21a761e49ef49026d382895c0e71aeb39a45c
Total changesets: 1
Log message:
6738200 CPU power management sometimes makes gratuitous xc_call().

Files:
        update: usr/src/uts/i86pc/io/cpudrv/cpudrv_throttle.c
        update: usr/src/uts/i86pc/io/cpudrv/pwrnow.c
        update: usr/src/uts/i86pc/io/cpudrv/speedstep.c