x86/fpu: Rename fpu->has_fpu to fpu->fpregs_active
authorIngo Molnar <mingo@kernel.org>
Fri, 24 Apr 2015 12:19:26 +0000 (14:19 +0200)
committerIngo Molnar <mingo@kernel.org>
Tue, 19 May 2015 13:47:36 +0000 (15:47 +0200)
commitd5cea9b0af1509f170337ba8f47160d0699ff374
treebe0c3057b782e219ed1c87374f3824ac7b63ad25
parent73a3aeb3ac5312122d5a261c7acb0ab9be93857a
x86/fpu: Rename fpu->has_fpu to fpu->fpregs_active

So the current code uses fpu->has_cpu to determine whether a given
user FPU context is actively loaded into the FPU's registers [*] and
that those registers represent the task's current FPU state.

But this term is not unambiguous: especially the distinction between
fpu->has_fpu, PF_USED_MATH and fpu_fpregs_owner_ctx is not clear.

Increase clarity by unambigously signalling that it's about
hardware registers being active right now, by renaming it to
fpu->fpregs_active.

( In later patches we'll use more of the 'fpregs' naming, which will
  make it easier to grep for as well. )

[*] There's the kernel_fpu_begin()/end() primitive that also
    activates FPU hw registers as well and uses them, without
    touching the fpu->fpregs_active flag.

Reviewed-by: Borislav Petkov <bp@alien8.de>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
arch/x86/include/asm/fpu/api.h
arch/x86/include/asm/fpu/internal.h
arch/x86/include/asm/fpu/types.h
arch/x86/kernel/fpu/core.c