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net: reintroduce missing rcu_assign_pointer() calls

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commit a9b3cd7f32 (rcu: convert uses of rcu_assign_pointer(x, NULL) to
RCU_INIT_POINTER) did a lot of incorrect changes, since it did a
complete conversion of rcu_assign_pointer(x, y) to RCU_INIT_POINTER(x,
y).

We miss needed barriers, even on x86, when y is not NULL.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
CC: Stephen Hemminger <shemminger@vyatta.com>
CC: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet
2012-01-12 04:41:32 +00:00
committed by David S. Miller
parent 9ee6045f09
commit cf778b00e9
32 changed files with 61 additions and 63 deletions
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8
net/ipv4/igmp.c
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@@ -1249,7 +1249,7 @@ void ip_mc_inc_group(struct in_device *in_dev, __be32 addr)
im->next_rcu = in_dev->mc_list;
in_dev->mc_count++;
RCU_INIT_POINTER(in_dev->mc_list, im);
rcu_assign_pointer(in_dev->mc_list, im);
#ifdef CONFIG_IP_MULTICAST
igmpv3_del_delrec(in_dev, im->multiaddr);
@@ -1821,7 +1821,7 @@ int ip_mc_join_group(struct sock *sk , struct ip_mreqn *imr)
iml->next_rcu = inet->mc_list;
iml->sflist = NULL;
iml->sfmode = MCAST_EXCLUDE;
RCU_INIT_POINTER(inet->mc_list, iml);
rcu_assign_pointer(inet->mc_list, iml);
ip_mc_inc_group(in_dev, addr);
err = 0;
done:
@@ -2008,7 +2008,7 @@ int ip_mc_source(int add, int omode, struct sock *sk, struct
atomic_sub(IP_SFLSIZE(psl->sl_max), &sk->sk_omem_alloc);
kfree_rcu(psl, rcu);
}
RCU_INIT_POINTER(pmc->sflist, newpsl);
rcu_assign_pointer(pmc->sflist, newpsl);
psl = newpsl;
}
rv = 1; /* > 0 for insert logic below if sl_count is 0 */
@@ -2111,7 +2111,7 @@ int ip_mc_msfilter(struct sock *sk, struct ip_msfilter *msf, int ifindex)
} else
(void) ip_mc_del_src(in_dev, &msf->imsf_multiaddr, pmc->sfmode,
0, NULL, 0);
RCU_INIT_POINTER(pmc->sflist, newpsl);
rcu_assign_pointer(pmc->sflist, newpsl);
pmc->sfmode = msf->imsf_fmode;
err = 0;
done: