Commit 6f5298c2 authored Nov 13, 2012 by Fenghua Yu Committed by H. Peter Anvin Nov 14, 2012

x86/i387.c: Initialize thread xstate only on CPU0 only once



init_thread_xstate() is only called once to avoid overriding xstate_size during
boot time or during CPU hotplug.

Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Link: http://lkml.kernel.org/r/1352835171-3958-14-git-send-email-fenghua.yu@intel.com


Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

parent 8d966a04

arch/x86/kernel/i387.c

+5 −1

Original line number	Diff line number	Diff line
		@@ -175,7 +175,11 @@ void __cpuinit fpu_init(void)
		cr0 \|= X86_CR0_EM;
		write_cr0(cr0);

		if (!smp_processor_id())
		/*
		* init_thread_xstate is only called once to avoid overriding
		* xstate_size during boot time or during CPU hotplug.
		*/
		if (xstate_size == 0)
		init_thread_xstate();

		mxcsr_feature_mask_init();