On Fri, 2016-01-15 at 16:04 +1100, Cyril Bur wrote: > With threads leaving the math bits enabled in their saved MSR to indicate > that the hardware is hot and a restore is not needed, children need to turn > it off as when they do get scheduled, there's no way their registers could > have been hot.
Is this a bug in the current code? Mikey > Signed-off-by: Cyril Bur <cyril...@gmail.com> > --- > arch/powerpc/kernel/process.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/arch/powerpc/kernel/process.c > b/arch/powerpc/kernel/process.c > index dccc87e..e0c3d2d 100644 > --- a/arch/powerpc/kernel/process.c > +++ b/arch/powerpc/kernel/process.c > @@ -1307,6 +1307,7 @@ int copy_thread(unsigned long clone_flags, > unsigned long usp, > > f = ret_from_fork; > } > + childregs->msr &= ~(MSR_FP|MSR_VEC|MSR_VSX); > sp -= STACK_FRAME_OVERHEAD; > > /* _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
