Merge git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog

[sfrench/cifs-2.6.git] / virt / kvm / kvm_main.c

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 5a0cd194dce00ee75b40b73d146ee478db1e4d38..c82ae24926340cfa40ad8c3bbc9f65dd79c32fff 100644 (file)
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -341,7 +341,11 @@ static void kvm_mmu_notifier_release(struct mmu_notifier *mn,
                                     struct mm_struct *mm)
 {
        struct kvm *kvm = mmu_notifier_to_kvm(mn);
+       int idx;
+
+       idx = srcu_read_lock(&kvm->srcu);
        kvm_arch_flush_shadow(kvm);
+       srcu_read_unlock(&kvm->srcu, idx);
 }
 
 static const struct mmu_notifier_ops kvm_mmu_notifier_ops = {
@@ -648,7 +652,7 @@ skip_lpage:
 
        /* Allocate page dirty bitmap if needed */
        if ((new.flags & KVM_MEM_LOG_DIRTY_PAGES) && !new.dirty_bitmap) {
-               unsigned dirty_bytes = ALIGN(npages, BITS_PER_LONG) / 8;
+               unsigned long dirty_bytes = kvm_dirty_bitmap_bytes(&new);
 
                new.dirty_bitmap = vmalloc(dirty_bytes);
                if (!new.dirty_bitmap)
@@ -768,7 +772,7 @@ int kvm_get_dirty_log(struct kvm *kvm,
 {
        struct kvm_memory_slot *memslot;
        int r, i;
-       int n;
+       unsigned long n;
        unsigned long any = 0;
 
        r = -EINVAL;
@@ -780,7 +784,7 @@ int kvm_get_dirty_log(struct kvm *kvm,
        if (!memslot->dirty_bitmap)
                goto out;
 
-       n = ALIGN(memslot->npages, BITS_PER_LONG) / 8;
+       n = kvm_dirty_bitmap_bytes(memslot);
 
        for (i = 0; !any && i < n/sizeof(long); ++i)
                any = memslot->dirty_bitmap[i];
@@ -1186,10 +1190,13 @@ void mark_page_dirty(struct kvm *kvm, gfn_t gfn)
        memslot = gfn_to_memslot_unaliased(kvm, gfn);
        if (memslot && memslot->dirty_bitmap) {
                unsigned long rel_gfn = gfn - memslot->base_gfn;
+               unsigned long *p = memslot->dirty_bitmap +
+                                       rel_gfn / BITS_PER_LONG;
+               int offset = rel_gfn % BITS_PER_LONG;
 
                /* avoid RMW */
-               if (!generic_test_le_bit(rel_gfn, memslot->dirty_bitmap))
-                       generic___set_le_bit(rel_gfn, memslot->dirty_bitmap);
+               if (!generic_test_le_bit(offset, p))
+                       generic___set_le_bit(offset, p);
        }
 }