diff options
| author | Fenghua Yu <fenghua.yu@intel.com> | 2012-11-13 20:32:48 +0100 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2012-11-15 00:28:10 +0100 |
| commit | 30242aa6023b71325c6b8addac06faf544a85fd0 (patch) | |
| tree | 94b99db2e530fe10a11cfdacb16a6c36f4e2e27e /arch/x86/kernel/cpu/mtrr/main.c | |
| parent | x86, hotplug: During CPU0 online, enable x2apic, set_numa_node. (diff) | |
| download | linux-30242aa6023b71325c6b8addac06faf544a85fd0.tar.xz linux-30242aa6023b71325c6b8addac06faf544a85fd0.zip | |
x86, hotplug: The first online processor saves the MTRR state
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>
Link: http://lkml.kernel.org/r/1352835171-3958-12-git-send-email-fenghua.yu@intel.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch/x86/kernel/cpu/mtrr/main.c')
| -rw-r--r-- | 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 6b96110bb0c3..e4c1a4184531 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) |