Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1210043 > unrolled thread

[PATCH v2 0/5] drivers/tty: make more bool drivers explicitly non-modular

Back to article view | Back to linux.kernel

Contents

  [PATCH v2 0/5] drivers/tty: make more bool drivers explicitly non-modular Paul Gortmaker <paul.gortmaker@windriver.com> - 2015-08-20 00:00 +0200
    [PATCH 5/5] drivers/tty: make serial 8250_lpc18xx.c Kconfig a tristate Paul Gortmaker <paul.gortmaker@windriver.com> - 2015-08-20 00:00 +0200
      Re: [PATCH 5/5] drivers/tty: make serial 8250_lpc18xx.c Kconfig a tristate Joachim Eastwood <manabian@gmail.com> - 2015-08-20 09:00 +0200

#1210043 — [PATCH v2 0/5] drivers/tty: make more bool drivers explicitly non-modular

[v2: drop dead module code removal from 8250_lpc18xx.c ; instead convert it
 from bool to tristate ; also add ack to hvc_console commit.]

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.

Paul.

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

Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jiri Slaby <jslaby@suse.com>
Cc: Joachim Eastwood <manabian@gmail.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-serial@vger.kernel.org

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 Kconfig a tristate

 drivers/tty/hvc/hvc_console.c   | 18 +-----------------
 drivers/tty/pty.c               |  7 +++++--
 drivers/tty/serial/8250/Kconfig |  2 +-
 drivers/tty/serial/mpsc.c       | 36 +++---------------------------------
 drivers/tty/sysrq.c             |  6 +++++-
 5 files changed, 15 insertions(+), 54 deletions(-)

-- 
2.5.0

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

[toc] | [next] | [standalone]

#1210044 — [PATCH 5/5] drivers/tty: make serial 8250_lpc18xx.c Kconfig a tristate

The Kconfig currently controlling compilation of this code is:

8250/Kconfig:config SERIAL_8250_LPC18XX
8250/Kconfig:        bool "NXP LPC18xx/43xx serial port support"

...meaning that it currently is not being built as a module by anyone.

When targetting orphaned modular code in non-modular drivers, this
came up.  Joachim indicated that the driver was actually meant to
be tristate but ended up bool by accident.  So here we make it
tristate instead of removing the modular code that was essentially
orphaned.

Suggested-by: Joachim Eastwood <manabian@gmail.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jiri Slaby <jslaby@suse.com>
Cc: Joachim Eastwood <manabian@gmail.com>
Cc: linux-serial@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
---
 drivers/tty/serial/8250/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig
index e1de1181b322..f5c4b01f6f1d 100644
--- a/drivers/tty/serial/8250/Kconfig
+++ b/drivers/tty/serial/8250/Kconfig
@@ -337,7 +337,7 @@ config SERIAL_8250_FINTEK
 	  through the PNP driver. If unsure, say N.
 
 config SERIAL_8250_LPC18XX
-	bool "NXP LPC18xx/43xx serial port support"
+	tristate "NXP LPC18xx/43xx serial port support"
 	depends on SERIAL_8250 && OF && (ARCH_LPC18XX || COMPILE_TEST)
 	default ARCH_LPC18XX
 	help
-- 
2.5.0

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

[toc] | [prev] | [next] | [standalone]

#1210199 — Re: [PATCH 5/5] drivers/tty: make serial 8250_lpc18xx.c Kconfig a tristate

On 19 August 2015 at 23:48, Paul Gortmaker <paul.gortmaker@windriver.com> wrote:
> The Kconfig currently controlling compilation of this code is:
>
> 8250/Kconfig:config SERIAL_8250_LPC18XX
> 8250/Kconfig:        bool "NXP LPC18xx/43xx serial port support"
>
> ...meaning that it currently is not being built as a module by anyone.
>
> When targetting orphaned modular code in non-modular drivers, this
> came up.  Joachim indicated that the driver was actually meant to
> be tristate but ended up bool by accident.  So here we make it
> tristate instead of removing the modular code that was essentially
> orphaned.
>
> Suggested-by: Joachim Eastwood <manabian@gmail.com>
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Cc: Jiri Slaby <jslaby@suse.com>
> Cc: Joachim Eastwood <manabian@gmail.com>
> Cc: linux-serial@vger.kernel.org
> Cc: linux-arm-kernel@lists.infradead.org
> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>

Acked-by: Joachim Eastwood <manabian@gmail.com>

Build tested as a module on lpc18xx.

Thanks for fixing it Paul.


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

[toc] | [prev] | [standalone]

Back to top | Article view | linux.kernel

csiph-web