commit 9db66bdcc83749affe61c61eb8ff3cf08f42afec
author Eric Dumazet <dada1@cosmosbay.com> Thu Nov 20 20:39:09 2008 -0800
committer David S. Miller <davem@davemloft.net> Thu Nov 20 20:39:09 2008 -0800
tree 81bb20e4f569d3b44731498428277db9d77fa7a9
parent b8c26a33c8b6f0a150e9cb38ed80b890be55395c

net: convert TCP/DCCP ehash rwlocks to spinlocks

Now TCP & DCCP use RCU lookups, we can convert ehash rwlocks to spinlocks.

/proc/net/tcp and other seq_file 'readers' can safely be converted to 'writers'.

This should speedup writers, since spin_lock()/spin_unlock()
only use one atomic operation instead of two for write_lock()/write_unlock()

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>