Hi All, I'm observing a huge number of warnings produced during the boot of my Keystone 2 board when USB is enabled. [ 2.496460] BUG: using __this_cpu_read() in preemptible [00000000] code: khubd/202 [ 2.504030] caller is __mod_zone_page_state+0x20/0xc8 [ 2.509094] CPU: 1 PID: 202 Comm: khubd Not tainted 3.15.0-rc1-00015-ge521fa3-dirty #55 [ 2.517122] [<c0013788>] (unwind_backtrace) from [<c001129c>] (show_stack+0x10/0x14) [ 2.524854] [<c001129c>] (show_stack) from [<c049f800>] (dump_stack+0x68/0xb8) [ 2.532086] [<c049f800>] (dump_stack) from [<c02731c0>] (check_preemption_disabled+0xe8/0x10c) [ 2.540708] [<c02731c0>] (check_preemption_disabled) from [<c00bc944>] (__mod_zone_page_state+0x20/0xc8) [ 2.550187] [<c00bc944>] (__mod_zone_page_state) from [<c00b50c8>] (reclaim_clean_pages_from_list+0x16c/0x178) [ 2.560193] [<c00b50c8>] (reclaim_clean_pages_from_list) from [<c00ac8f0>] (alloc_contig_range+0x10c/0x2d0) [ 2.569932] [<c00ac8f0>] (alloc_contig_range) from [<c02b0e58>] (dma_alloc_from_contiguous+0x70/0x118) [ 2.579241] [<c02b0e58>] (dma_alloc_from_contiguous) from [<c0017d24>] (__alloc_from_contiguous+0x34/0x160) [ 2.588974] [<c0017d24>] (__alloc_from_contiguous) from [<c0018760>] (__dma_alloc+0x18c/0x294) [ 2.597582] [<c0018760>] (__dma_alloc) from [<c00189f0>] (arm_dma_alloc+0xac/0xd8) [ 2.605140] [<c00189f0>] (arm_dma_alloc) from [<c00d84a8>] (dma_pool_alloc+0xc8/0x1b8) [ 2.613067] [<c00d84a8>] (dma_pool_alloc) from [<c0317120>] (xhci_alloc_container_ctx+0x70/0xe0) [ 2.621851] [<c0317120>] (xhci_alloc_container_ctx) from [<c03194e8>] (xhci_alloc_virt_device+0x98/0x220) [ 2.631418] [<c03194e8>] (xhci_alloc_virt_device) from [<c0315d28>] (xhci_alloc_dev+0x158/0x1f0) [ 2.640207] [<c0315d28>] (xhci_alloc_dev) from [<c02f6310>] (usb_alloc_dev+0x1d4/0x27c) [ 2.648217] [<c02f6310>] (usb_alloc_dev) from [<c02fb204>] (hub_thread+0x670/0x1204) [ 2.655943] [<c02fb204>] (hub_thread) from [<c003d8d8>] (kthread+0xcc/0xe8) [ 2.662906] [<c003d8d8>] (kthread) from [<c000e2f8>] (ret_from_fork+0x14/0x3c) Anyone else sees the same thing? Regards, -grygorii -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html