Techwizz/kernel-fxtec-pro1x
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

x86, hotplug: The first online processor saves the MTRR state

Browse source 
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>
This commit is contained in:
Fenghua Yu 2012-11-13 11:32:48 -08:00 committed by H. Peter Anvin
parent 27fd185f3d
commit 30242aa602
1 changed files with 7 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

9
arch/x86/kernel/cpu/mtrr/main.c
View file

@ -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)