tree e43a9387a3a313cfdb4a34298d532dc7a1b7391c
parent 7aabffcab47a0f881c7640f5c108e8d3f2e35ebf
author Steven Whitehouse <swhiteho@redhat.com> 1143641532 -0500
committer Steven Whitehouse <swhiteho@redhat.com> 1143641532 -0500

[GFS2] Update locking in log.c

Replace the lock_for_trans()/lock_for_flush() functions with an rwsem.
In fact the sd_log_flush_lock becomes an rwsem (the write part of it)
and is extended slightly to cover everything that the lock_for_flush()
used to cover. The read part of the lock is instead of lock_for_trans().

This corrects the races in the original code and reduces the code size.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>