Description of problem: boot system Additional info: BUG: sleeping function called from invalid context at mm/slub.c:925 in_atomic(): 1, irqs_disabled(): 0, pid: 1526, name: Xorg 2 locks held by Xorg/1526: #0: (&rdev->exclusive_lock){.+.+.+}, at: [<ffffffffa00eba89>] radeon_cs_ioctl+0x39/0xa10 [radeon] #1: (&(&bdev->fence_lock)->rlock){+.+.+.}, at: [<ffffffffa0071d67>] ttm_bo_move_accel_cleanup+0x57/0x330 [ttm] Pid: 1526, comm: Xorg Not tainted 3.8.0-0.rc5.git2.1.fc19.x86_64 #1 Call Trace: [<ffffffff8109f899>] __might_sleep+0x179/0x230 [<ffffffff811b115e>] kmem_cache_alloc_trace+0x4e/0x300 [<ffffffffa0071ee3>] ? ttm_bo_move_accel_cleanup+0x1d3/0x330 [ttm] [<ffffffffa0071ee3>] ttm_bo_move_accel_cleanup+0x1d3/0x330 [ttm] [<ffffffffa00d5912>] radeon_move_blit.isra.7+0xc2/0x160 [radeon] [<ffffffffa00d6130>] radeon_bo_move+0xb0/0x200 [radeon] [<ffffffffa006fed5>] ttm_bo_handle_move_mem+0x275/0x640 [ttm] [<ffffffffa0070909>] ? ttm_bo_mem_space+0x179/0x360 [ttm] [<ffffffffa0071117>] ttm_bo_move_buffer+0x127/0x150 [ttm] [<ffffffffa0074eed>] ? ttm_eu_list_ref_sub+0x3d/0x60 [ttm] [<ffffffffa00711e2>] ttm_bo_validate+0xa2/0x130 [ttm] [<ffffffffa00d7379>] radeon_bo_list_validate+0x79/0xc0 [radeon] [<ffffffffa00ebda4>] radeon_cs_ioctl+0x354/0xa10 [radeon] [<ffffffffa001c321>] drm_ioctl+0x501/0x5c0 [drm] [<ffffffffa00eba50>] ? radeon_cs_finish_pages+0xf0/0xf0 [radeon] [<ffffffff811dff05>] do_vfs_ioctl+0x305/0x530 [<ffffffff811ebe5c>] ? fget_light+0x3ac/0x520 [<ffffffff811e01b1>] sys_ioctl+0x81/0xa0 [<ffffffff816e0919>] system_call_fastpath+0x16/0x1b
*** This bug has been marked as a duplicate of bug 906296 ***