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x86, MCE, AMD: Adjust initcall sequence for xen

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there are 3 funcs which need to be _initcalled in a logic sequence:
1. xen_late_init_mcelog
2. mcheck_init_device
3. threshold_init_device

xen_late_init_mcelog must register xen_mce_chrdev_device before
native mce_chrdev_device registration if running under xen platform;

mcheck_init_device should be inited before threshold_init_device to
initialize mce_device, otherwise a a NULL ptr dereference will cause panic.

so we use following _initcalls
1. device_initcall(xen_late_init_mcelog);
2. device_initcall_sync(mcheck_init_device);
3. late_initcall(threshold_init_device);

when running under xen, the initcall order is 1,2,3;
on baremetal, we skip 1 and we do only 2 and 3.

Acked-and-tested-by: Borislav Petkov <bp@amd64.org>
Suggested-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Liu, Jinsong <jinsong.liu@intel.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
Liu, Jinsong 2012-06-07 19:58:50 +08:00 committed by Konrad Rzeszutek Wilk
parent cef12ee52b
commit a8fccdb061
1 changed files with 21 additions and 1 deletions
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22
arch/x86/kernel/cpu/mcheck/mce_amd.c
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@ -777,4 +777,24 @@ static __init int threshold_init_device(void)
return 0;
}
device_initcall(threshold_init_device);
/*
* there are 3 funcs which need to be _initcalled in a logic sequence:
* 1. xen_late_init_mcelog
* 2. mcheck_init_device
* 3. threshold_init_device
*
* xen_late_init_mcelog must register xen_mce_chrdev_device before
* native mce_chrdev_device registration if running under xen platform;
*
* mcheck_init_device should be inited before threshold_init_device to
* initialize mce_device, otherwise a NULL ptr dereference will cause panic.
*
* so we use following _initcalls
* 1. device_initcall(xen_late_init_mcelog);
* 2. device_initcall_sync(mcheck_init_device);
* 3. late_initcall(threshold_init_device);
*
* when running under xen, the initcall order is 1,2,3;
* on baremetal, we skip 1 and we do only 2 and 3.
*/
late_initcall(threshold_init_device);