Hello,

when I boot 3.19 kernel on real n900 device it show these errors in dmesg:

[    0.256103] hw-breakpoint: debug architecture 0x4 unsupported.
[    0.257659] In-band Error seen by MPU  at address 0
[    0.257720] ------------[ cut here ]------------
[    0.257781] WARNING: CPU: 0 PID: 1 at drivers/bus/omap_l3_smx.c:166 omap3_l3_app_irq+0xd4/0x118()
[    0.257843] Modules linked in:
[    0.257873] CPU: 0 PID: 1 Comm: swapper Not tainted 3.19.0-rc5+ #291
[    0.257934] Hardware name: Nokia RX-51 board
[    0.257995] [<c0012678>] (unwind_backtrace) from [<c0010d44>] (show_stack+0x10/0x14)
[    0.258087] [<c0010d44>] (show_stack) from [<c0032194>] (warn_slowpath_common+0x84/0xac)
[    0.258148] [<c0032194>] (warn_slowpath_common) from [<c00321d4>] (warn_slowpath_null+0x18/0x1c)
[    0.258209] [<c00321d4>] (warn_slowpath_null) from [<c01f30e0>] (omap3_l3_app_irq+0xd4/0x118)
[    0.258300] [<c01f30e0>] (omap3_l3_app_irq) from [<c0061fd0>] (handle_irq_event_percpu+0xcc/0x294)
[    0.258361] [<c0061fd0>] (handle_irq_event_percpu) from [<c00621fc>] (handle_irq_event+0x64/0x8c)
[    0.258422] [<c00621fc>] (handle_irq_event) from [<c0064b9c>] (handle_level_irq+0xcc/0x130)
[    0.258483] [<c0064b9c>] (handle_level_irq) from [<c0061850>] (generic_handle_irq+0x20/0x30)
[    0.258544] [<c0061850>] (generic_handle_irq) from [<c0061a38>] (__handle_domain_irq+0x80/0xa4)
[    0.258636] [<c0061a38>] (__handle_domain_irq) from [<c0008520>] (omap_intc_handle_irq+0x78/0xa4)
[    0.258697] [<c0008520>] (omap_intc_handle_irq) from [<c0409380>] (__irq_svc+0x40/0x74)
[    0.258728] Exception stack(0xcf893db0 to 0xcf893df8)
[    0.258789] 3da0:                                     cf982000 c064568c 00000000 00000000
[    0.258850] 3dc0: c064568c cf982000 00000000 0000001c 60000113 cf982034 00000000 00000001
[    0.258880] 3de0: 00000064 cf893df8 c00633f8 c0063430 60000113 ffffffff
[    0.258941] [<c0409380>] (__irq_svc) from [<c0063430>] (__setup_irq+0x3bc/0x518)
[    0.259002] [<c0063430>] (__setup_irq) from [<c006376c>] (setup_irq+0x58/0x80)
[    0.259063] [<c006376c>] (setup_irq) from [<c002d2c0>] (omap_system_dma_probe+0x22c/0x2c0)
[    0.259124] [<c002d2c0>] (omap_system_dma_probe) from [<c0267618>] (platform_drv_probe+0x48/0x90)
[    0.259185] [<c0267618>] (platform_drv_probe) from [<c0265d8c>] (really_probe+0xac/0x1e0)
[    0.259277] [<c0265d8c>] (really_probe) from [<c0265fb8>] (driver_probe_device+0x30/0x48)
[    0.259338] [<c0265fb8>] (driver_probe_device) from [<c0266030>] (__driver_attach+0x60/0x84)
[    0.259399] [<c0266030>] (__driver_attach) from [<c0264910>] (bus_for_each_dev+0x50/0x84)
[    0.259460] [<c0264910>] (bus_for_each_dev) from [<c02656c0>] (bus_add_driver+0xac/0x1bc)
[    0.259521] [<c02656c0>] (bus_add_driver) from [<c0266968>] (driver_register+0x9c/0xe0)
[    0.259582] [<c0266968>] (driver_register) from [<c0008798>] (do_one_initcall+0x100/0x1b0)
[    0.259643] [<c0008798>] (do_one_initcall) from [<c05ddcfc>] (do_basic_setup+0x88/0xc0)
[    0.259735] [<c05ddcfc>] (do_basic_setup) from [<c05ddd94>] (kernel_init_freeable+0x60/0xfc)
[    0.259796] [<c05ddd94>] (kernel_init_freeable) from [<c03f94dc>] (kernel_init+0x8/0xe4)
[    0.259857] [<c03f94dc>] (kernel_init) from [<c000dc78>] (ret_from_fork+0x14/0x3c)
[    0.259948] ---[ end trace a24f42a84395254d ]---

Note that this device has flashed special Nokia X-Loader which enable L3 firewall for AES support. But 
omap aes crypto module is not compiled and enabled.

-- 
Pali Rohár
pali.rohar@gmail.com