I was testing earlycon with 8250 dw serial console. And it hangs in these cases: 1/ kernel hang when calling early write function after free_initmem: a) the earlycon not disabled after the init code(due to keep_bootcon or not specify a real console to switch to) b) the early write func is marked as __init, for example 8250_early. 2/ kernel hang when calling early write function after disable unused clks/pm domain: a) the earlycon not disabled after the init code b) the disable unused clks/pm domain kill the requiered clks/pm domain, since they are not referenced by the earlycon. 3/ kernel hang when calling early write function after the serial console driver runtime suspended: a) the earlycon not disabled after the init code b) the serial console driver's runtime suspend kills the requiered clks/pm domain, since they are not referenced by the earlycon. This serial fix 1/ case only. Jeffy Chen (5): serial: arc: Remove __init marking from early write serial: omap: Remove __init marking from early write serial: xuartps: Remove __init marking from early write serial: 8250_ingenic: Remove __init marking from early write serial: 8250_early: Remove __init marking from early write drivers/tty/serial/8250/8250_early.c | 8 ++++---- drivers/tty/serial/8250/8250_ingenic.c | 8 ++++---- drivers/tty/serial/arc_uart.c | 4 ++-- drivers/tty/serial/omap-serial.c | 13 ++++++------- drivers/tty/serial/xilinx_uartps.c | 2 +- 5 files changed, 17 insertions(+), 18 deletions(-) -- 2.1.4
