x86/fpu: Optimize fpu_copy()
authorIngo Molnar <mingo@kernel.org>
Mon, 27 Apr 2015 07:59:11 +0000 (09:59 +0200)
committerIngo Molnar <mingo@kernel.org>
Tue, 19 May 2015 13:47:54 +0000 (15:47 +0200)
commit68271c6ae726d7ab51e39b7342c838761bf0a25c
tree0184bb65cd74a7d9e2dddc5dbd43b0d0f6d478e3
parent48c4717f30cc1f83d02f045c3b47a2885863bff2
x86/fpu: Optimize fpu_copy()

Optimize fpu_copy() a bit by expanding the ->fpstate_active == 1
portion of fpu__save() into it.

( The main purpose of this change is to enable another, larger
  optimization that will be done in the next patch. )

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/kernel/fpu/core.c