Here it is with KALLSYMS_ALL:
[ 80.587694] ====================================
[ 80.605928] [ BUG: possible deadlock detected! ]
[ 80.619729] ------------------------------------
[ 80.633532] mount/3534 is trying to acquire lock:
[ 80.647593] (&inode->i_mutex){--..}, at: [<ffffffff804396af>] mutex_lock+0x22/0x27
[ 80.670683]
[ 80.670684] but task is already holding lock:
[ 80.688170] (&inode->i_mutex){--..}, at: [<ffffffff804396af>] mutex_lock+0x22/0x27
[ 80.711260]
[ 80.711261] which could potentially lead to deadlocks!
[ 80.731083]
[ 80.731083] other info that might help us debug this:
[ 80.750618] 2 locks held by mount/3534:
[ 80.762085] #0: (&s->s_umount#16){--..}, at: [<ffffffff8028c07b>] sget+0x1a0/0x407
[ 80.785513] #1: (&inode->i_mutex){--..}, at: [<ffffffff804396af>] mutex_lock+0x22/0x27
[ 80.809952]
[ 80.809952] stack backtrace:
[ 80.823003]
[ 80.823003] Call Trace:
[ 80.834790] [<ffffffff80247b4e>] __lockdep_acquire+0x18a/0xad2
[ 80.852503] [<ffffffff804396af>] mutex_lock+0x22/0x27
[ 80.867887] [<ffffffff8024887d>] lockdep_acquire+0x82/0xa3
[ 80.884596] [<ffffffff80439420>] __mutex_lock_slowpath+0xfd/0x36a
[ 80.903095] [<ffffffff804396af>] mutex_lock+0x22/0x27
[ 80.918499] [<ffffffff880ce635>] :sunrpc:rpc_populate+0x43/0x141
[ 80.936759] [<ffffffff880cedb8>] :sunrpc:rpc_mkdir+0xb6/0x172
[ 80.954206] [<ffffffff802a182a>] mntput_no_expire+0x1b/0xb9
[ 80.971173] [<ffffffff802a9864>] simple_pin_fs+0xc3/0xd3
[ 80.987371] [<ffffffff880bf8c1>] :sunrpc:rpc_new_client+0x226/0x348
[ 81.006390] [<ffffffff880c06e0>] :sunrpc:rpc_create_client+0xc/0x3e
[ 81.025415] [<ffffffff88105e0c>] :nfs:nfs_get_sb+0x559/0x6e8
[ 81.042598] [<ffffffff8028b7ef>] vfs_kern_mount+0x8b/0x196
[ 81.059305] [<ffffffff8028b948>] do_kern_mount+0x3c/0x57
[ 81.075495] [<ffffffff802a355e>] do_mount+0x7dd/0x851
[ 81.090906] [<ffffffff80247240>] mark_lock+0x3b/0x4fc
[ 81.106289] [<ffffffff802629f2>] get_page_from_freelist+0x34e/0x4cc
[ 81.125331] [<ffffffff802479a0>] trace_hardirqs_on+0x165/0x189
[ 81.143050] [<ffffffff80262a61>] get_page_from_freelist+0x3bd/0x4cc
[ 81.162094] [<ffffffff8043b431>] _spin_unlock_irqrestore+0x3f/0x47
[ 81.180880] [<ffffffff80262bf2>] __alloc_pages+0x82/0x33d
[ 81.197332] [<ffffffff802787b7>] alloc_pages_current+0xa0/0xa9
[ 81.215074] [<ffffffff803361cc>] _raw_spin_lock+0xc7/0x15d
[ 81.231781] [<ffffffff802a366f>] sys_mount+0x9d/0xe9
[ 81.246905] [<ffffffff8043aae1>] trace_hardirqs_on_thunk+0x35/0x37
[ 81.265690] [<ffffffff80209652>] system_call+0x7e/0x83
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