From: Fenghua Yu Date: Tue, 13 Nov 2012 19:32:50 +0000 (-0800) Subject: x86/i387.c: Initialize thread xstate only on CPU0 only once X-Git-Tag: firefly_0821_release~3680^2~1506^2~1 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=6f5298c2139b06925037490367906f3d73955b86;p=firefly-linux-kernel-4.4.55.git 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 Link: http://lkml.kernel.org/r/1352835171-3958-14-git-send-email-fenghua.yu@intel.com Signed-off-by: H. Peter Anvin --- diff --git a/arch/x86/kernel/i387.c b/arch/x86/kernel/i387.c index 675a05012449..245a71db401a 100644 --- a/arch/x86/kernel/i387.c +++ b/arch/x86/kernel/i387.c @@ -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();