x86/fpu: Rename fpu::fpstate_active to fpu::initialized
authorIngo Molnar <mingo@kernel.org>
Tue, 26 Sep 2017 07:43:36 +0000 (09:43 +0200)
committerIngo Molnar <mingo@kernel.org>
Tue, 26 Sep 2017 07:43:36 +0000 (09:43 +0200)
commite4a81bfcaae1ebbdc6efe74e8ea563144d90e9a9
tree7b1d916413eab7beb165eb969208930730edcfc8
parent685c930d6e58e31e251ec354f9dca3958a4c5040
x86/fpu: Rename fpu::fpstate_active to fpu::initialized

The x86 FPU code used to have a complex state machine where both the FPU
registers and the FPU state context could be 'active' (or inactive)
independently of each other - which enabled features like lazy FPU restore.

Much of this complexity is gone in the current code: now we basically can
have FPU-less tasks (kernel threads) that don't use (and save/restore) FPU
state at all, plus full FPU users that save/restore directly with no laziness
whatsoever.

But the fpu::fpstate_active still carries bits of the old complexity - meanwhile
this flag has become a simple flag that shows whether the FPU context saving
area in the thread struct is initialized and used, or not.

Rename it to fpu::initialized to express this simplicity in the name as well.

Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@amacapital.net>
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/20170923130016.21448-30-mingo@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
arch/x86/ia32/ia32_signal.c
arch/x86/include/asm/fpu/internal.h
arch/x86/include/asm/fpu/types.h
arch/x86/include/asm/trace/fpu.h
arch/x86/kernel/fpu/core.c
arch/x86/kernel/fpu/init.c
arch/x86/kernel/fpu/regset.c
arch/x86/kernel/fpu/signal.c
arch/x86/kernel/fpu/xstate.c
arch/x86/kernel/signal.c
arch/x86/mm/pkeys.c