[Patch net] addrconf: reduce unnecessary atomic allocations

[Cong Wang]

All the 3 callers of addrconf_add_mroute() assert RTNL
lock, they don't take any additional lock either, so
it is safe to convert it to GFP_KERNEL.

Same for sit_add_v4_addrs().

Cc: David Ahern <dsah...@gmail.com>
Signed-off-by: Cong Wang <xiyou.wangc...@gmail.com>
---
 net/ipv6/addrconf.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 2fac4ad74867..d51a8c0b3372 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -2398,7 +2398,7 @@ static void addrconf_add_mroute(struct net_device *dev)
 
        ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0);
 
-       ip6_route_add(&cfg, GFP_ATOMIC, NULL);
+       ip6_route_add(&cfg, GFP_KERNEL, NULL);
 }
 
 static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
@@ -3062,7 +3062,7 @@ static void sit_add_v4_addrs(struct inet6_dev *idev)
        if (addr.s6_addr32[3]) {
                add_addr(idev, &addr, plen, scope);
                addrconf_prefix_route(&addr, plen, 0, idev->dev, 0, pflags,
-                                     GFP_ATOMIC);
+                                     GFP_KERNEL);
                return;
        }
 
@@ -3087,7 +3087,7 @@ static void sit_add_v4_addrs(struct inet6_dev *idev)
 
                                add_addr(idev, &addr, plen, flag);
                                addrconf_prefix_route(&addr, plen, 0, idev->dev,
-                                                     0, pflags, GFP_ATOMIC);
+                                                     0, pflags, GFP_KERNEL);
                        }
                }
        }
-- 
2.14.4