Messages in this thread Patch in this message | | | From | "Fenghua Yu" <> | Subject | [PATCH v3 3/7] x86/mtrr/main.c: Ask the first online CPU to save mtrr | Date | Wed, 9 Nov 2011 16:34:13 -0800 |
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From: Fenghua Yu <fenghua.yu@intel.com>
Ask the first online CPU to save mtrr instead of asking BSP. BSP could be offline when mtrr_save_state() is called.
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com> --- arch/x86/kernel/cpu/mtrr/main.c | 9 +++++++-- 1 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kernel/cpu/mtrr/main.c b/arch/x86/kernel/cpu/mtrr/main.c index 6b96110..e4c1a41 100644 --- a/arch/x86/kernel/cpu/mtrr/main.c +++ b/arch/x86/kernel/cpu/mtrr/main.c @@ -695,11 +695,16 @@ void mtrr_ap_init(void) } /** - * Save current fixed-range MTRR state of the BSP + * Save current fixed-range MTRR state of the first cpu in cpu_online_mask. */ void mtrr_save_state(void) { - smp_call_function_single(0, mtrr_save_fixed_ranges, NULL, 1); + int first_cpu; + + get_online_cpus(); + first_cpu = cpumask_first(cpu_online_mask); + smp_call_function_single(first_cpu, mtrr_save_fixed_ranges, NULL, 1); + put_online_cpus(); } void set_mtrr_aps_delayed_init(void) -- 1.6.0.3
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