853a9ae29e97 ("serial: 8250: fix handle_irq locking")
9a33fbf9d230 ("tty: make tty_buffer_space_avail return uint")
75f4e830fa9c ("serial: do not restore interrupt state in sysrq helper")
08d5470308ac ("serial: core: fix sysrq overhead regression")
10652a9e9fe3 ("Revert "serial: core: Refactor uart_unlock_and_check_sysrq()"")