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KVM: Convert kvm_lock to raw_spinlock

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Code under this lock requires non-preemptibility. Ensure this also over
-rt by converting it to raw spinlock.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Jan Kiszka
2011-02-08 12:55:33 +01:00
committed by Marcelo Tosatti
parent bd3d1ec3d2
commit e935b8372c
4 changed files with 23 additions and 23 deletions
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4
arch/x86/kvm/mmu.c
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@@ -3587,7 +3587,7 @@ static int mmu_shrink(struct shrinker *shrink, int nr_to_scan, gfp_t gfp_mask)
if (nr_to_scan == 0)
goto out;
spin_lock(&kvm_lock);
raw_spin_lock(&kvm_lock);
list_for_each_entry(kvm, &vm_list, vm_list) {
int idx, freed_pages;
@@ -3610,7 +3610,7 @@ static int mmu_shrink(struct shrinker *shrink, int nr_to_scan, gfp_t gfp_mask)
if (kvm_freed)
list_move_tail(&kvm_freed->vm_list, &vm_list);
spin_unlock(&kvm_lock);
raw_spin_unlock(&kvm_lock);
out:
return percpu_counter_read_positive(&kvm_total_used_mmu_pages);