To make sure that all the writes to the log marking the entries
as being in need of reset are observed in order, use a
smp_store_release() when updating the log entry flags.
Signed-off-by: Marc Zyngier <maz@xxxxxxxxxx>
---
tools/testing/selftests/kvm/dirty_log_test.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/kvm/dirty_log_test.c b/tools/testing/selftests/kvm/dirty_log_test.c
index 9c883c94d478..3d29f4bf4f9c 100644
--- a/tools/testing/selftests/kvm/dirty_log_test.c
+++ b/tools/testing/selftests/kvm/dirty_log_test.c
@@ -17,6 +17,7 @@
#include <linux/bitmap.h>
#include <linux/bitops.h>
#include <linux/atomic.h>
+#include <asm/barrier.h>
#include "kvm_util.h"
#include "test_util.h"
@@ -284,7 +285,7 @@ static inline bool dirty_gfn_is_dirtied(struct kvm_dirty_gfn *gfn)
static inline void dirty_gfn_set_collected(struct kvm_dirty_gfn *gfn)
{
- gfn->flags = KVM_DIRTY_GFN_F_RESET;
+ smp_store_release(&gfn->flags, KVM_DIRTY_GFN_F_RESET);
}
static uint32_t dirty_ring_collect_one(struct kvm_dirty_gfn *dirty_gfns,
--
2.34.1
