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| author | David S. Miller <davem@davemloft.net> | 2011-07-14 07:53:20 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-07-14 07:53:20 -0700 |
| commit | f6b72b6217f8c24f2a54988e58af858b4e66024d (patch) | |
| tree | c59d5adcf9bb226db6f602c5078106052524cfea /include/net/dst.h | |
| parent | 390fd0b388e4f85549e5d60bdeb21364b344d9b9 (diff) | |
| download | lwn-f6b72b6217f8c24f2a54988e58af858b4e66024d.tar.gz lwn-f6b72b6217f8c24f2a54988e58af858b4e66024d.zip | |
net: Embed hh_cache inside of struct neighbour.
Now that there is a one-to-one correspondance between neighbour
and hh_cache entries, we no longer need:
1) dynamic allocation
2) attachment to dst->hh
3) refcounting
Initialization of the hh_cache entry is indicated by hh_len
being non-zero, and such initialization is always done with
the neighbour's lock held as a writer.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/dst.h')
| -rw-r--r-- | include/net/dst.h | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/include/net/dst.h b/include/net/dst.h index e12ddfb9eb16..0dd7ccbc0dd5 100644 --- a/include/net/dst.h +++ b/include/net/dst.h @@ -38,7 +38,6 @@ struct dst_entry { unsigned long expires; struct dst_entry *path; struct neighbour *neighbour; - struct hh_cache *hh; #ifdef CONFIG_XFRM struct xfrm_state *xfrm; #else @@ -47,6 +46,14 @@ struct dst_entry { int (*input)(struct sk_buff*); int (*output)(struct sk_buff*); + int flags; +#define DST_HOST 0x0001 +#define DST_NOXFRM 0x0002 +#define DST_NOPOLICY 0x0004 +#define DST_NOHASH 0x0008 +#define DST_NOCACHE 0x0010 +#define DST_NOCOUNT 0x0020 + short error; short obsolete; unsigned short header_len; /* more space at head required */ @@ -62,7 +69,7 @@ struct dst_entry { * (L1_CACHE_SIZE would be too much) */ #ifdef CONFIG_64BIT - long __pad_to_align_refcnt[1]; + long __pad_to_align_refcnt[2]; #endif /* * __refcnt wants to be on a different cache line from @@ -71,13 +78,6 @@ struct dst_entry { atomic_t __refcnt; /* client references */ int __use; unsigned long lastuse; - int flags; -#define DST_HOST 0x0001 -#define DST_NOXFRM 0x0002 -#define DST_NOPOLICY 0x0004 -#define DST_NOHASH 0x0008 -#define DST_NOCACHE 0x0010 -#define DST_NOCOUNT 0x0020 union { struct dst_entry *next; struct rtable __rcu *rt_next; |