K 10 svn:author V 4 jkim K 8 svn:date V 27 2010-07-26T19:53:09.886130Z K 7 svn:log V 212 Re-implement FPU suspend/resume for amd64. This removes superfluous uses of critical_enter(9) and critical_exit(9) by fpugetregs() and fpusetregs(). Also, we do not touch PCB flags any more. MFC after: 1 month END