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author | kmacy <kmacy@FreeBSD.org> | 2007-04-14 19:42:20 +0000 |
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committer | kmacy <kmacy@FreeBSD.org> | 2007-04-14 19:42:20 +0000 |
commit | 386fa3b37f80f6f88aea42952c395c34d11055b8 (patch) | |
tree | 3bf68571de337bf4ade1fdeff1b6d882ed30c421 /sys | |
parent | 550a575853b319eba36cfc266a3a4cf9602a8188 (diff) | |
download | FreeBSD-src-386fa3b37f80f6f88aea42952c395c34d11055b8.zip FreeBSD-src-386fa3b37f80f6f88aea42952c395c34d11055b8.tar.gz |
pad out m_hdr to make pkthdr word-aligned
shuffle pkthdr.len so that pkthdr.header is aligned without compiler added padding
Reviewed by: rwatson, andre, sam
Diffstat (limited to 'sys')
-rw-r--r-- | sys/sys/mbuf.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/sys/sys/mbuf.h b/sys/sys/mbuf.h index b9f1c18..58ad3a6 100644 --- a/sys/sys/mbuf.h +++ b/sys/sys/mbuf.h @@ -77,6 +77,12 @@ struct mb_args { }; #endif /* _KERNEL */ +#if defined(__LP64__) +#define M_HDR_PAD 6 +#else +#define M_HDR_PAD 2 +#endif + /* * Header present at the beginning of every mbuf. */ @@ -87,6 +93,7 @@ struct m_hdr { int mh_len; /* amount of data in this mbuf */ int mh_flags; /* flags; see below */ short mh_type; /* type of data in this mbuf */ + uint8_t pad[M_HDR_PAD];/* word align */ }; /* @@ -105,9 +112,9 @@ struct m_tag { */ struct pkthdr { struct ifnet *rcvif; /* rcv interface */ - int len; /* total packet length */ /* variables for ip and tcp reassembly */ void *header; /* pointer to packet header */ + int len; /* total packet length */ /* variables for hardware checksum */ int csum_flags; /* flags regarding checksum */ int csum_data; /* data field used by csum routines */ |