[PATCH 0/5] drivers/tty: make more bool drivers explicitly non-modular

From: Paul Gortmaker
Date: Sat Aug 08 2015 - 20:54:18 EST

This second set of patches to drivers/tty steps outside of the serial
dir, and an improved auditing finds two more serial drivers pretending
to be modular that really are not.

The reasoning for doing this is the same as the first set[1] of patches
and is largely copied below:

In the previous merge window, we made changes to allow better
delineation between modular and non-modular code in commit
0fd972a7d91d6e15393c449492a04d94c0b89351 ("module: relocate module_init
from init.h to module.h"). This allows us to now ensure module code
looks modular and non-modular code does not accidentally look modular
without suffering build breakage.

Here we target code that is, by nature of their Kconfig settings, only
available to be built-in, but implicitly presenting itself as being
possibly modular by way of using modular headers, macros, and functions.

The goal here is to remove that illusion of modularity from these
drivers, but in a way that leaves the actual runtime unchanged.
In doing so, we remove code that has never been tested and adds
no value to the tree. And we begin the process of expecting a
level of consistency between the Kconfig of a driver and the code
that the driver uses.

Build tested for allyesconfig on x86_64, and ARM for lpc81xx, and powerpc
for hvc_console and mpsc, layered onto tty/tty-next as a baseline.


[1] https://lkml.kernel.org/r/1437530538-5078-1-git-send-email-paul.gortmaker@xxxxxxxxxxxxx

Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: Jiri Slaby <jslaby@xxxxxxxx>
Cc: Joachim Eastwood <manabian@xxxxxxxxx>
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Cc: linuxppc-dev@xxxxxxxxxxxxxxxx
Cc: linux-serial@xxxxxxxxxxxxxxx

Paul Gortmaker (5):
drivers/tty: make pty.c slightly more explicitly non-modular
drivers/tty: make sysrq.c slightly more explicitly non-modular
drivers/tty: make hvc_console.c explicitly non-modular
drivers/tty: make serial/mpsc.c driver explicitly non-modular
drivers/tty: make serial 8250_lpc18xx.c explicitly non-modular

drivers/tty/hvc/hvc_console.c | 18 +----------------
drivers/tty/pty.c | 7 +++++--
drivers/tty/serial/8250/8250_lpc18xx.c | 19 ++++--------------
drivers/tty/serial/mpsc.c | 36 +++-------------------------------
drivers/tty/sysrq.c | 6 +++++-
5 files changed, 18 insertions(+), 68 deletions(-)

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/