x86/fpu: Change fpu->fpregs_active users to fpu->fpstate_active
We want to simplify the FPU state machine by eliminating fpu->fpregs_active, and we can do that because the two state flags (::fpregs_active and ::fpstate_active) are set essentially together. The old lazy FPU switching code used to make a distinction - but there's no lazy switching code anymore, we always switch in an 'eager' fashion. Do this by first changing all substantial uses of fpu->fpregs_active to fpu->fpstate_active and adding a few debug checks to double check our assumption is correct. Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Eric Biggers <ebiggers3@gmail.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rik van Riel <riel@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Yu-cheng Yu <yu-cheng.yu@intel.com> Link: http://lkml.kernel.org/r/20170923130016.21448-19-mingo@kernel.orgSigned-off-by: Ingo Molnar <mingo@kernel.org>
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