kernel unaligned accesses on 2.6.29.

[Robin Holt <holt@sgi.com>]

I just built and booted an ia64 2.6.29 kernel.  While accessing NFS
filesystems, I occassionally get:

kernel unaligned access to 0xe00007bc3b8f67b9, ip=0xa00000020a61e370
kernel unaligned access to 0xe00007bc3b8f67b1, ip=0xa00000020a61e3d1

grep a00000020a61 /proc/modules
lockd 146448 1 nfs, Live 0xa00000020a610000


These come in pairs.  I tracked it down to the lockd.ko kernel module
and then objdump'd to find we are in:


nsm_get_handle
nsm_init_private():
/data/lwork/attica2/holt/git-linus/v2.6.29/fs/lockd/mon.c:280
    e370:       0b 00 98 68 98 11       [MMI]       st8 [r52]=r38;;
/data/lwork/attica2/holt/git-linus/v2.6.29/fs/lockd/mon.c:279
    e376:       00 00 00 02 00 00                   nop.m 0x0
    e37c:       92 d0 e9 53                         shl r16=r9,5;;

nsm_display_address():
/data/lwork/attica2/holt/git-linus/v2.6.29/fs/lockd/mon.c:86
...
    e3d0:       0a 60 28 1c 8d 39       [MMI]       cmp4.eq p12,p13\x10,r14;;
    e3d6:       00 a8 95 30 23 00                   st8 [r37]=r53
    e3dc:       00 00 04 00                         nop.i 0x0