[PATCH v2 2/4] xen-pcifront: Align address of flags to size of unsigned long

[Fenghua Yu]

The address of "flags" is passed to atomic bitops which require the
address is aligned to size of unsigned long.

Signed-off-by: Fenghua Yu <fenghua.yu@xxxxxxxxx>
---
 include/xen/interface/io/pciif.h | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/include/xen/interface/io/pciif.h b/include/xen/interface/io/pciif.h
index d9922ae36eb5..639d5fb484a3 100644
--- a/include/xen/interface/io/pciif.h
+++ b/include/xen/interface/io/pciif.h
@@ -103,8 +103,11 @@ struct xen_pcie_aer_op {
 	uint32_t devfn;
 };
 struct xen_pci_sharedinfo {
-	/* flags - XEN_PCIF_* */
-	uint32_t flags;
+	/* flags - XEN_PCIF_*. Force alignment for atomic bit operations. */
+	union {
+		uint32_t	flags;
+		unsigned long	flags_alignment;
+	};
 	struct xen_pci_op op;
 	struct xen_pcie_aer_op aer_op;
 };
-- 
2.19.1