aboutsummaryrefslogtreecommitdiffstats
path: root/net/bluetooth/bnep
diff options
context:
space:
mode:
authorEric Dumazet <dada1@cosmosbay.com>2005-12-22 15:49:22 -0500
committerDavid S. Miller <davem@sunset.davemloft.net>2006-01-03 16:11:15 -0500
commit90ddc4f0470427df306f308ad03db6b6b21644b8 (patch)
treef97c1d57b25585394ebbd4b42b8d42a339f98644 /net/bluetooth/bnep
parent77d76ea310b50a9c8ff15bd290fcb4ed4961adf2 (diff)
[NET]: move struct proto_ops to const
I noticed that some of 'struct proto_ops' used in the kernel may share a cache line used by locks or other heavily modified data. (default linker alignement is 32 bytes, and L1_CACHE_LINE is 64 or 128 at least) This patch makes sure a 'struct proto_ops' can be declared as const, so that all cpus can share all parts of it without false sharing. This is not mandatory : a driver can still use a read/write structure if it needs to (and eventually a __read_mostly) I made a global stubstitute to change all existing occurences to make them const. This should reduce the possibility of false sharing on SMP, and speedup some socket system calls. Signed-off-by: Eric Dumazet <dada1@cosmosbay.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/bluetooth/bnep')
-rw-r--r--net/bluetooth/bnep/sock.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/bluetooth/bnep/sock.c b/net/bluetooth/bnep/sock.c
index 9778c6acd53b..ccbaf69afc5b 100644
--- a/net/bluetooth/bnep/sock.c
+++ b/net/bluetooth/bnep/sock.c
@@ -146,7 +146,7 @@ static int bnep_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long
146 return 0; 146 return 0;
147} 147}
148 148
149static struct proto_ops bnep_sock_ops = { 149static const struct proto_ops bnep_sock_ops = {
150 .family = PF_BLUETOOTH, 150 .family = PF_BLUETOOTH,
151 .owner = THIS_MODULE, 151 .owner = THIS_MODULE,
152 .release = bnep_sock_release, 152 .release = bnep_sock_release,