FYI, triggered a new type of DMA debug warning today, this time on
an older box, in the boomerang/vortex 3c59x driver:
[ 211.098328] eth0: setting full-duplex.
[ 1745.974321] ------------[ cut here ]------------
[ 1745.980344] WARNING: at lib/dma-debug.c:627
check_for_illegal_area+0xa6/0xe4()
[ 1745.983613] 3c59x 0000:00:0b.0: DMA-API: device driver maps memory from
kernel text or rodata [addr=c0fffe54] [size=428]
[ 1745.986521] Modules linked in:
[ 1745.986521] Pid: 19063, comm: distcc Not tainted
2.6.29-rc8-tip-02734-gfd4c260-dirty #729
[ 1745.993830] Call Trace:
[ 1745.996309] [<c102e98b>] warn_slowpath+0x5e/0x74
[ 1746.001069] [<c124de1e>] ? memcpy+0xe/0x31
[ 1746.005322] [<c14eb801>] ? skb_put+0x62/0x7b
[ 1746.009732] [<c15e0cf5>] ? _spin_unlock_irqrestore+0x19/0x25
[ 1746.011540] [<c1006274>] ? enable_8259A_irq+0x45/0x48
[ 1746.016729] [<c105ee38>] ? handle_level_irq+0xe3/0xef
[ 1746.021921] [<c1004efb>] ? handle_irq+0x36/0x43
[ 1746.022582] [<c1002c35>] ? restore_nocheck_notrace+0x0/0xe
[ 1746.028198] [<c124e0e0>] ? trace_hardirqs_on_thunk+0xc/0x10
[ 1746.033900] [<c1002c35>] ? restore_nocheck_notrace+0x0/0xe
[ 1746.035517] [<c125724f>] check_for_illegal_area+0xa6/0xe4
[ 1746.041046] [<c1258382>] debug_dma_map_page+0x12a/0x13b
[ 1746.043356] [<c1316366>] boomerang_start_xmit+0x40b/0x54c
[ 1746.048900] [<c109c226>] ? kmem_cache_free+0xf6/0xfe
[ 1746.054013] [<c14f34ca>] dev_hard_start_xmit+0x101/0x171
[ 1746.055471] [<c15081bc>] __qdisc_run+0xf4/0x21f
[ 1746.060143] [<c14f5e02>] dev_queue_xmit+0x1e2/0x2dc
[ 1746.065162] [<c1524fc8>] ip_finish_output+0x213/0x24d
[ 1746.066360] [<c109a489>] ? check_object+0xfa/0x156
[ 1746.071291] [<c15252f8>] ip_output+0x4e/0x51
[ 1746.075693] [<c1523a51>] ip_local_out+0x39/0x42
[ 1746.080366] [<c1525727>] ip_queue_xmit+0x2ce/0x314
[ 1746.085295] [<c109d146>] ? __kmalloc_node_track_caller+0x165/0x172
[ 1746.087612] [<c14ec135>] ? __alloc_skb+0x38/0x115
[ 1746.092458] [<c15391de>] ? tcp_v4_md5_do_lookup+0xa/0x36
[ 1746.097916] [<c15350ee>] ? __tcp_select_window+0xe/0x12f
[ 1746.099368] [<c1535b2d>] ? tcp_options_write+0x138/0x1b7
[ 1746.104820] [<c1536257>] tcp_transmit_skb+0x452/0x492
[ 1746.110009] [<c1537824>] tcp_write_xmit+0x21d/0x2c4
[ 1746.111029] [<c153791d>] __tcp_push_pending_frames+0x52/0x12e
[ 1746.116912] [<c152b3a4>] do_tcp_sendpages+0x4a9/0x4d6
[ 1746.122112] [<c152c036>] tcp_sendpage+0x54/0x69
[ 1746.122783] [<c14e51f7>] sock_sendpage+0x34/0x3b
[ 1746.127547] [<c10bc5bf>] pipe_to_sendpage+0x5b/0x66
[ 1746.132576] [<c10bd2a2>] __splice_from_pipe+0x65/0x1db
[ 1746.137853] [<c10bc564>] ? pipe_to_sendpage+0x0/0x66
[ 1746.138956] [<c10bd864>] splice_from_pipe+0x56/0x6d
[ 1746.143975] [<c10bd893>] generic_splice_sendpage+0x18/0x1a
[ 1746.149599] [<c10bc564>] ? pipe_to_sendpage+0x0/0x66
[ 1746.150703] [<c10bca34>] do_splice_from+0xc0/0xd1
[ 1746.155547] [<c10bcbb1>] direct_splice_actor+0x1c/0x21
[ 1746.160835] [<c10bcfd5>] splice_direct_to_actor+0x124/0x1f1
[ 1746.162841] [<c10bcb95>] ? direct_splice_actor+0x0/0x21
[ 1746.168203] [<c10bd0dc>] do_splice_direct+0x3a/0x55
[ 1746.173220] [<c10a3110>] do_sendfile+0x1b0/0x23e
[ 1746.177980] [<c10a38af>] sys_sendfile+0x5b/0xac
[ 1746.178649] [<c1002b74>] sysenter_do_call+0x12/0x2b
[ 1746.183668] ---[ end trace e9b0fe468818fdae ]---
Ingo
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