Commit-ID: 30242aa6023b71325c6b8addac06faf544a85fd0 Gitweb: http://git.kernel.org/tip/30242aa6023b71325c6b8addac06faf544a85fd0 Author: Fenghua Yu <fenghua...@intel.com> AuthorDate: Tue, 13 Nov 2012 11:32:48 -0800 Committer: H. Peter Anvin <h...@linux.intel.com> CommitDate: Wed, 14 Nov 2012 15:28:10 -0800
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...@intel.com> Link: http://lkml.kernel.org/r/1352835171-3958-12-git-send-email-fenghua...@intel.com Signed-off-by: H. Peter Anvin <h...@linux.intel.com> --- arch/x86/kernel/cpu/mtrr/main.c | 9 +++++++-- 1 file 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) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
