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bonding: consolidate the two rlb_next_rx_slave functions into one 

__rlb_next_rx_slave() is a copy of rlb_next_rx_slave() with the
difference that it uses rcu primitives to walk the slave list. We don't
need the two functions and can make rlb_next_rx_slave() a wrapper for
callers which hold RTNL.
So add a comment and ASSERT_RTNL() to make sure what is intended.

Signed-off-by: Nikolay Aleksandrov <nikolay@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nikolay Aleksandrov 2014-09-15 17:19:33 +02:00 committed by David S. Miller
parent 437024067a
commit 56924c3811
1 changed files with 14 additions and 32 deletions
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46
drivers/net/bonding/bond_alb.c
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@ -334,38 +334,6 @@ out:
return RX_HANDLER_ANOTHER; return RX_HANDLER_ANOTHER;
} }
static struct slave *rlb_next_rx_slave(struct bonding *bond)
{
struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond));
struct slave *before = NULL, *rx_slave = NULL, *slave;
struct list_head *iter;
bool found = false;
bond_for_each_slave(bond, slave, iter) {
if (!bond_slave_can_tx(slave))
continue;
if (!found) {
if (!before || before->speed < slave->speed)
before = slave;
} else {
if (!rx_slave || rx_slave->speed < slave->speed)
rx_slave = slave;
}
if (slave == bond_info->rx_slave)
found = true;
}
/* we didn't find anything after the current or we have something
* better before and up to the current slave
*/
if (!rx_slave || (before && rx_slave->speed < before->speed))
rx_slave = before;
if (rx_slave)
bond_info->rx_slave = rx_slave;
return rx_slave;
}
/* Caller must hold rcu_read_lock() */ /* Caller must hold rcu_read_lock() */
static struct slave *__rlb_next_rx_slave(struct bonding *bond) static struct slave *__rlb_next_rx_slave(struct bonding *bond)
{ {
@ -399,6 +367,20 @@ static struct slave *__rlb_next_rx_slave(struct bonding *bond)
return rx_slave; return rx_slave;
} }
/* Caller must hold RTNL, rcu_read_lock is obtained only to silence checkers */
static struct slave *rlb_next_rx_slave(struct bonding *bond)
{
struct slave *rx_slave;
ASSERT_RTNL();
rcu_read_lock();
rx_slave = __rlb_next_rx_slave(bond);
rcu_read_unlock();
return rx_slave;
}
/* teach the switch the mac of a disabled slave /* teach the switch the mac of a disabled slave
* on the primary for fault tolerance * on the primary for fault tolerance
* *