tty/serial: Migrate mux to use has_sysrq

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The SUPPORT_SYSRQ ifdeffery is not nice as:
- May create misunderstanding about sizeof(struct uart_port) between
  different objects
- Prevents moving functions from serial_core.h
- Reduces readability (well, it's ifdeffery - it's hard to follow)

In order to remove SUPPORT_SYSRQ, has_sysrq variable has been added.
Initialise it in driver's probe and remove ifdeffery.

Signed-off-by: Dmitry Safonov <dima@arista.com>
Link: https://lore.kernel.org/r/20191213000657.931618-27-dima@arista.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Dmitry Safonov 2019-12-13 00:06:25 +00:00 • committed by Greg Kroah-Hartman

parent 804ca1df09

commit b4088e830b

1 changed files with 1 additions and 4 deletions

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drivers/tty/serial/mux.c

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