x86/fpu: Split an fpstate_alloc_init() function out of init_fpu()
authorIngo Molnar <mingo@kernel.org>
Fri, 3 Apr 2015 10:02:02 +0000 (12:02 +0200)
committerIngo Molnar <mingo@kernel.org>
Tue, 19 May 2015 13:47:10 +0000 (15:47 +0200)
commit97185c95f7ab7f752473c34672dab0925758094b
tree287e1d57d678656ada4da43572d1defef7d3ae7e
parent68ad8b9feae583cc5102ec86ad410fce542a5311
x86/fpu: Split an fpstate_alloc_init() function out of init_fpu()

Most init_fpu() users don't want the register-saving aspect of the
function, they are calling it for 'current' and when FPU registers
are not allocated and initialized yet.

Split out a simplified API that does just that (and add debug-checks
for these conditions): fpstate_alloc_init().

Use it where appropriate.

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/i387.h
arch/x86/kernel/i387.c
arch/x86/kernel/process.c
arch/x86/kernel/traps.c
arch/x86/kernel/xsave.c
arch/x86/kvm/x86.c
arch/x86/math-emu/fpu_entry.c