Compiling the 2.6.2-rc2 kernel on my machine with allyesconfig and gcc 
3.3.1 triggers the following warning:

   CC      fs/xfs/xfs_log_recover.o
fs/xfs/xfs_log_recover.c: In function `xlog_recover_reorder_trans':
fs/xfs/xfs_log_recover.c:1534: warning: `flags' might be used 
uninitialized in this function

I've added an "= 0" to the appropiate line which lets it cleanly compile 
now. Attached patch fixes the warning and is against 2.6.2-rc2. Apply 
with patch -p1 < patch-XFSwarning.

Best regards
Michael Veeck