lib: Add zero padding field to flow_wildcards.

Before this commit, the compiler would add two bytes of padding to
the 'flow_wildcards' structure to achieve 32bit alignment.  These
two bytes had inconsistent values which caused 'flow_wildcards_hash'
to behave inconsistently.  This commit explicitly 32bit aligns
'flow_wildcards' with zero padding.

This commit also fixes an issue where in-band rules were not
getting deleted when in-band control was disabled.

1 files changed, 1 insertions, 0 deletions

diff --git a/lib/flow.h b/lib/flow.h
index fd3246b6a..1509a7d12 100644
--- a/lib/flow.h
+++ b/lib/flow.h
@@ -124,6 +124,7 @@ struct flow_wildcards {
     ovs_be32 nw_src_mask;       /* 1-bit in each significant nw_src bit. */
     ovs_be32 nw_dst_mask;       /* 1-bit in each significant nw_dst bit. */
     ovs_be16 vlan_tci_mask;     /* 1-bit in each significant vlan_tci bit. */
+    uint16_t zero;              /* Padding field set to zero. */
 };
 
 void flow_wildcards_init_catchall(struct flow_wildcards *);