lkml.org 
[lkml]   [2012]   [Jan]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH v5 11/12] x86/i387.c: Thread xstate is initialized only on CPU0 once
    Date
    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 739d859..cca99fa 100644
    --- a/arch/x86/kernel/i387.c
    +++ b/arch/x86/kernel/i387.c
    @@ -107,7 +107,11 @@ 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


    \
     
     \ /
      Last update: 2012-01-11 18:27    [W:0.021 / U:60.512 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site