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Commit 30242aa6 authored by Fenghua Yu's avatar Fenghua Yu Committed by H. Peter Anvin
Browse files

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: default avatarFenghua Yu <fenghua.yu@intel.com>
Link: http://lkml.kernel.org/r/1352835171-3958-12-git-send-email-fenghua.yu@intel.com


Signed-off-by: default avatarH. Peter Anvin <hpa@linux.intel.com>
parent 27fd185f

arch/x86/kernel/cpu/mtrr/main.c

+7 −2
Original line number Diff line number Diff line
@@ -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)