[SCM] Hurd branch, master, updated. v0.5-27-g218cae5

[Richard Braun]

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- Log -----------------------------------------------------------------
commit 218cae5a714342b5d82a5b004d58f0a9ebbbfe5e
Author: Richard Braun <address@hidden>
Date:   Wed Nov 6 01:44:09 2013 +0100

    pfinet: fix emission on the loopback device
    
    Unlike other devices, sending packets on the loopback device causes the
    netif_rx() function to be called from the net_bh worker thread. Since
    the thread is already running, it can't wake itself up when calling
    mark_bh(). Use a new variable to indicate when net_bh work is pending.
    
    * glue-include/linux/interrupt.h (net_bh_raised): Declare new global
    variable.
    (mark_bh): Set net_bh_raised to 1 before waking up net_bh worker thread.
    * loopback.c (loopback_xmit): Add comment giving details about locking.
    * sched.c (net_bh_raised): Define new global variable.
    (net_bh_worker): Wait for net_bh_raised to become true and reset it
    before processing net_bh work.

-----------------------------------------------------------------------

Summary of changes:
 pfinet/glue-include/linux/interrupt.h |    2 ++
 pfinet/loopback.c                     |    7 +++++++
 pfinet/sched.c                        |    7 ++++++-
 3 files changed, 15 insertions(+), 1 deletions(-)


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