#cat /sys/class/graphics/fb0/fsl_disp_dev_property
CPU: 1 PID: 12732 Comm: sh Not tainted 4.1.15 #8
Hardware name: Freescale i.MX6 Quad/DualLite (Device Tree)
[<c010e4b8>] (unwind_backtrace) from [<c010ad48>] (show_stack+0x10/0x14)
[<c010ad48>] (show_stack) from [<c093063c>] (dump_stack+0x84/0xc4)
[<c093063c>] (dump_stack) from [<c0444650>] (show_disp_dev+0x14/0x6c)
[<c0444650>] (show_disp_dev) from [<c04b01f0>] (dev_attr_show+0x1c/0x48)
[<c04b01f0>] (dev_attr_show) from [<c0260cc0>] (sysfs_kf_seq_show+0x88/0xf4)
[<c0260cc0>] (sysfs_kf_seq_show) from [<c021d61c>] (seq_read+0x1ec/0x48c)
[<c021d61c>] (seq_read) from [<c01fc6a8>] (__vfs_read+0x20/0xd0)
[<c01fc6a8>] (__vfs_read) from [<c01fce80>] (vfs_read+0x7c/0x104)
[<c01fce80>] (vfs_read) from [<c01fd724>] (SyS_read+0x44/0x9c)
[<c01fd724>] (SyS_read) from [<c0107580>] (ret_fast_syscall+0x0/0x3c)
notes: when kernel booting, call dump_stack() function , kernel maybe crash(hold).......
can't normal mount rootfs.....