I have the latest dma debug patches from FUJITA Tomonori
and http://patchwork.kernel.org/patch/33866/ running on
sparc32 and it looks like it might have found an issue at
boot time:
WARNING: at lib/dma-debug.c:874 check_for_illegal_area+0x174/0x1ac()
esp ffd7ba30: DMA-API: device driver maps memory from kernel text or
rodata [addr=f0007000] [size=4096]
Modules linked in: ext3 jbd sd_mod sun_esp esp_scsi scsi_transport_spi
scsi_mod
[f01200ec : check_for_illegal_area+0x174/0x1ac ]
[f0120c6c : debug_dma_map_sg+0x15c/0x1c8 ]
[fe6946d0 : sbus_esp_map_sg+0xec/0xfc [sun_esp] ]
[fe684454 : esp_maybe_execute_command+0x1f0/0x6f8 [esp_scsi] ]
[fe6849e4 : esp_queuecommand+0x88/0x98 [esp_scsi] ]
[fe638c00 : scsi_dispatch_cmd+0x200/0x2a8 [scsi_mod] ]
[fe63f038 : scsi_request_fn+0x3f4/0x52c [scsi_mod] ]
[f00f6e28 : __generic_unplug_device+0x40/0x50 ]
[f00f6e54 : generic_unplug_device+0x1c/0x38 ]
[f00f4ca8 : blk_unplug+0x14/0x24 ]
[f00adf10 : sync_buffer+0x48/0x60 ]
[f01f7184 : __wait_on_bit+0x4c/0xa4 ]
[f01f728c : out_of_line_wait_on_bit+0xb0/0xc0 ]
[fe709320 : __ext3_get_inode_loc+0x3bc/0x418 [ext3] ]
[fe7093b4 : ext3_iget+0x38/0x65c [ext3] ]
[fe712c70 : ext3_get_journal+0xc/0xd4 [ext3] ]
f0007000 in kallsyms is:
f0007000 T trapbase_cpu3
which matches the error message.
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