linux24/fs/jfs

Update of /usr/cvs/jfs/linux24/fs/jfs
In directory swg3ws024:/tmp/cvs-serv8815

Modified Files:
	jfs_txnmgr.c 
Log Message:
Releasing LOGGC_LOCK too early

In txLazyCommit, we are releasing log->gclock (LOGGC_LOCK) before
checking tblk->flag for tblkGC_LAZY.  For the case that tblkGC_LAZY
is not set, the user thread may release the tblk, and it may be
reused and the tblkGC_LAZY bit set again, between the time we release
the spinlock until we check the flag.  This problem is easy to hit
on a 2.5 kernel with CONFIG_PREEMPT set, but it is a potential problem
on SMP as well.

The fix is to hold the spinlock until after we've checked the flag.