OpenAFS Master Repository branch, master, updated. BP--openafs-stable-1_6_x-176-gcbaef55

[Gerrit Code Review]

The following commit has been merged in the master branch:
commit cbaef553978b7d81ba6d7b7721bcea97fe41870a
Author: Simon Wilkinson <sxw@your-file-system.com>
Date:   Sun Sep 26 15:48:54 2010 +0100

    RX: Tidy reader data locking
    
    Data which is accessed only by the reader thread doesn't need to be
    protected by call->lock
    
    Remove the call->lock protection where it isn't required, which makes
    certain read/write calls lock free.
    
    Stop rx_ResetCall from manipulating reader thread data. This data will
    be zero'd and cleared when the reader thread calls rx_EndCall, and
    doesn't need to be reset by the Listener thread.
    
    The change which made rx_ResetCall reset reader thread information
    was originally part of 559ea99b. It caused race conditions that were
    fixed by adding additional lock protection in d0cc6e, 4dadd2 and
    423ab97e. This commit reverts portions of all of those changes. It
    is safe to not clear the iovc in ResetCall because any NewCall must
    be balanced by a corresponding EndCall in the reader thread, and
    EndCall does the appropriate freeing of reader elements.
    
    Change-Id: I450469a4591fbe4af34482a2b219708795c57e8e
    Reviewed-on: http://gerrit.openafs.org/2856
    Reviewed-by: Derrick Brashear <shadow@dementia.org>
    Reviewed-by: Jeffrey Altman <jaltman@openafs.org>
    Tested-by: BuildBot <buildbot@rampaginggeek.com>

 src/rx/rx.c      |   17 ----------
 src/rx/rx_rdwr.c |   92 +++++++++++++++++-------------------------------------
 2 files changed, 29 insertions(+), 80 deletions(-)

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