Messages in this thread Patch in this message | | | From | "Fenghua Yu" <> | Subject | [PATCH v6 11/12] x86/i387.c: Thread xstate is initialized only on CPU0 once | Date | Thu, 10 May 2012 09:16:53 -0700 |
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From: Fenghua Yu <fenghua.yu@intel.com>
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> --- arch/x86/kernel/i387.c | 6 +++++- 1 files changed, 5 insertions(+), 1 deletions(-)
diff --git a/arch/x86/kernel/i387.c b/arch/x86/kernel/i387.c index 2d6e649..9d9ce97 100644 --- a/arch/x86/kernel/i387.c +++ b/arch/x86/kernel/i387.c @@ -188,7 +188,11 @@ 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(); -- 1.6.0.3
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