Re: [PATCH] Make math_state_restore() save and restore the interrupt flag

[Suresh Siddha]

On Sat, Feb 1, 2014 at 5:26 PM, H. Peter Anvin <hpa@xxxxxxxxx> wrote:
> Even "b" does that, no?

oh right. It needs an else. only for non-eager fpu case we should do stts()

  void __kernel_fpu_end(void)
  {
          if (use_eager_fpu()) {
                  struct task_struct *me = current;

                  if (tsk_used_math(me) && likely(!restore_fpu_checking(
me)))
                          return;
          } else
                  stts();
  }

thanks,
suresh

> "a" should be fine as long as we don't ever use
> those features in the kernel, even under kernel_fpu_begin/end().
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