serial_core: Un-ifdef sysrq SUPPORT_SYSRQ
commit1997e9dfdc84c8f73d6fc318355cf9e313aba183
authorDmitry Safonov <dima@arista.com>
Fri, 13 Dec 2019 00:06:02 +0000 (13 00:06 +0000)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Tue, 17 Dec 2019 14:10:17 +0000 (17 15:10 +0100)
tree45667cc951a1acdb82f63f05097ea9652e71cd43
parent8336240ebb248b46c778f28123a7ceec9817c3d2
serial_core: Un-ifdef sysrq SUPPORT_SYSRQ

The SUPPORT_SYSRQ is messy: every .c source should define it before
including "serial_core.h" if sysrq is supported or struct uart_port will
differ in sizes. Also this prevents moving to serial_core.c functions:
uart_handle_sysrq_char(), uart_prepare_sysrq_char(),
uart_unlock_and_check_sysrq().

It doesn't save many bytes in the structure, and a better way to reduce
it's size would be making rs485 and iso7816 pointers.

Introduce `has_sysrq` member to be used by serial line drivers further.

Signed-off-by: Dmitry Safonov <dima@arista.com>
Link: https://lore.kernel.org/r/20191213000657.931618-4-dima@arista.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
include/linux/serial_core.h