x86/fpu: Speed up lazy FPU restores slightly
authorAndy Lutomirski <luto@kernel.org>
Sun, 24 Jan 2016 22:38:09 +0000 (14:38 -0800)
committerIngo Molnar <mingo@kernel.org>
Tue, 9 Feb 2016 14:42:56 +0000 (15:42 +0100)
commitc6ab109f7e0eae3bae3bb10f8ddb0df67735c150
tree3afec625df2ba21a6bd7913ada3c6599d13f463d
parenta20d7297045f7fdcd676c15243192eb0e95a4306
x86/fpu: Speed up lazy FPU restores slightly

If we have an FPU, there's no need to check CR0 for FPU emulation.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
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: Quentin Casasnovas <quentin.casasnovas@oracle.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: yu-cheng yu <yu-cheng.yu@intel.com>
Link: http://lkml.kernel.org/r/980004297e233c27066d54e71382c44cdd36ef7c.1453675014.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
arch/x86/kernel/traps.c