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xen/x86: Initialize per_cpu(xen_vcpu, 0) a little earlier

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xen_cpuhp_setup() calls mutex_lock() which, when CONFIG_DEBUG_MUTEXES
is defined, ends up calling xen_save_fl(). That routine expects
per_cpu(xen_vcpu, 0) to be already initialized.

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Reported-by: Sander Eikelenboom <linux@eikelenboom.it>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
This commit is contained in:
Boris Ostrovsky 2016-10-02 18:45:19 -04:00 committed by David Vrabel
parent b057878b2a
commit 565fdc6a2a
1 changed files with 2 additions and 1 deletions
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3
arch/x86/xen/enlighten.c
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@ -1644,7 +1644,6 @@ asmlinkage __visible void __init xen_start_kernel(void)
xen_initial_gdt = &per_cpu(gdt_page, 0);
xen_smp_init();
WARN_ON(xen_cpuhp_setup());
#ifdef CONFIG_ACPI_NUMA
/*
@ -1658,6 +1657,8 @@ asmlinkage __visible void __init xen_start_kernel(void)
possible map and a non-dummy shared_info. */
per_cpu(xen_vcpu, 0) = &HYPERVISOR_shared_info->vcpu_info[0];
WARN_ON(xen_cpuhp_setup());
local_irq_disable();
early_boot_irqs_disabled = true;