mac80211: fix BUILD_BUG_ON() caused by misalignment on arm

On ARM alignment is done slightly different from other architectures.
struct ieee80211_tx_rate is aligned to word size, even though it only has 3
single-byte members, which triggers the BUILD_BUG_ON in
ieee80211_tx_info_clear_status

This patch marks the struct ieee80211_tx_rate as packed, so that ARM
behaves like the other architectures.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 1b8ed421feaa3d85f2bffd59ac5c6d03cf9ed79b..c813fbf7d3645a0f39d385084d48f05e15ea0168 100644 (file)
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -307,7 +307,7 @@ struct ieee80211_tx_rate {
        s8 idx;
        u8 count;
        u8 flags;
-};
+} __attribute__((packed));
 
 /**
  * struct ieee80211_tx_info - skb transmit information