OpenAFS Master Repository branch, master, updated. openafs-devel-1_5_73_1-9-gaf5923c

[Gerrit Code Review]

The following commit has been merged in the master branch:
commit af5923c0507f45fc4124ed9ae5ac5ed014923034
Author: Andrew Deason <adeason@sinenomine.net>
Date:   Thu Apr 1 16:42:25 2010 -0500

    tubik: Correct use of flags_cond and version_cond
    
    Waiters of flags_cond and version_cond were not doing so correctly;
    the correct way is to acquire a lock prior to their respective checks,
    and atomically drop/acquire that lock with pthread_cond_wait.
    Otherwise, we could miss a wakeup if a flag changed between our check
    and when we wait.
    
    To make this possible, make versionLock a normal pthread mutex in
    AFS_PTHREAD_ENV, so it is a lock we can pass to pthread_cond_wait.
    Make the waiters pass versionLock to pthread_cond_wait, and eliminate
    flags_mutex and version_mutex.
    
    Change-Id: Id33a72182b907d069e342cb049e23868ab2f7eb9
    Reviewed-on: http://gerrit.openafs.org/1681
    Tested-by: Andrew Deason <adeason@sinenomine.net>
    Reviewed-by: Derrick Brashear <shadow@dementia.org>
    Tested-by: Derrick Brashear <shadow@dementia.org>

 src/ubik/ubik.c   |   26 +++++++++++++++-----------
 src/ubik/ubik.p.h |   15 ++++++++++-----
 2 files changed, 25 insertions(+), 16 deletions(-)

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