linux/arch/x86/include/asm/fpu
Ingo Molnar 72ee6f87ad x86/fpu: Simplify __save_fpu()
__save_fpu() has this pattern:

		if (unlikely(system_state == SYSTEM_BOOTING))
			xsave_state_booting(&fpu->state.xsave);
		else
			xsave_state(&fpu->state.xsave);

... but it does not actually get called during system bootup.

So remove the complication and always call xsave_state().

To make sure this assumption is correct, add a WARN_ONCE()
debug check to xsave_state().

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>
2015-05-19 15:47:53 +02:00
..
api.h x86/fpu: Uninline the irq_ts_save()/restore() functions 2015-05-19 15:47:48 +02:00
internal.h x86/fpu: Factor out FPU hw activation/deactivation 2015-05-19 15:47:52 +02:00
types.h x86/fpu: Simplify FPU handling by embedding the fpstate in task_struct (again) 2015-05-19 15:47:49 +02:00
xsave.h x86/fpu: Simplify __save_fpu() 2015-05-19 15:47:53 +02:00