[Precise][SRU][PATCH] Fix for LP: #1021471

[Chris J Arges]

SRU Justification:

Impact:
    When creating new network namespace dmesg can show the following
    unregister_netdevice: waiting for lo to become free. Usage count = 1

Fix:
    Stefan Bader's SAUCE patch has fixed this for Quantal:
    UBUNTU: SAUCE: net/ipv4: Always flush route cache on unregister batch call

Testcase:
    The sourcecode found here:
    https://lists.debian.org/debian-kernel/2012/05/msg00494.html
    can be compiled and run as follows:

    sudo ./reproducer
    #ctrl+c
    sudo ./reproducer
    #wait for a while
    dmesg | grep unregister

Stefan Bader (1):
  UBUNTU: SAUCE: net/ipv4: Always flush route cache on unregister batch
    call

 net/ipv4/fib_frontend.c | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

-- 
1.9.1