On Tue, 2018-09-25 at 19:03 +0200, Peter Zijlstra wrote: > On Fri, Sep 21, 2018 at 08:03:27AM -0700, Yu-cheng Yu wrote: > > diff --git a/arch/x86/kernel/fpu/core.c b/arch/x86/kernel/fpu/core.c > > index 4bd56079048f..9f51b0e1da25 100644 > > --- a/arch/x86/kernel/fpu/core.c > > +++ b/arch/x86/kernel/fpu/core.c > > @@ -365,8 +365,13 @@ void fpu__drop(struct fpu *fpu) > > */ > > static inline void copy_init_user_fpstate_to_fpregs(void) > > { > > + /* > > + * Only XSAVES user states are copied. > > + * System states are preserved. > > + */ > > if (use_xsave()) > > - copy_kernel_to_xregs(&init_fpstate.xsave, -1); > > + copy_kernel_to_xregs(&init_fpstate.xsave, > > + xfeatures_mask_user); > > By my counting, that doesn't qualify for a line-break, it hits 80. > > If you were to do this line-break, coding style would have you liberally > sprinkle {} around. Ok, will fix it.