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  1. 16 11月, 2016 1 次提交
    • N
      Kconfig: Introduce the "imply" keyword · 237e3ad0
      由 Nicolas Pitre 提交于 
      The "imply" keyword is a weak version of "select" where the target
config symbol can still be turned off, avoiding those pitfalls that come
with the "select" keyword.

This is useful e.g. with multiple drivers that want to indicate their
ability to hook into a secondary subsystem while allowing the user to
configure that subsystem out without also having to unset these drivers.

Currently, the same effect can almost be achieved with:

config DRIVER_A
	tristate

config DRIVER_B
	tristate

config DRIVER_C
	tristate

config DRIVER_D
	tristate

[...]

config SUBSYSTEM_X
	tristate
	default DRIVER_A || DRIVER_B || DRIVER_C || DRIVER_D || [...]

This is unwieldy to maintain especially with a large number of drivers.
Furthermore, there is no easy way to restrict the choice for SUBSYSTEM_X
to y or n, excluding m, when some drivers are built-in. The "select"
keyword allows for excluding m, but it excludes n as well. Hence
this "imply" keyword.  The above becomes:

config DRIVER_A
	tristate
	imply SUBSYSTEM_X

config DRIVER_B
	tristate
	imply SUBSYSTEM_X

[...]

config SUBSYSTEM_X
	tristate

This is much cleaner, and way more flexible than "select". SUBSYSTEM_X
can still be configured out, and it can be set as a module when none of
the drivers are configured in or all of them are modular.
Signed-off-by: NNicolas Pitre <nico@linaro.org>
Acked-by: NRichard Cochran <richardcochran@gmail.com>
Acked-by: NThomas Gleixner <tglx@linutronix.de>
Acked-by: NJohn Stultz <john.stultz@linaro.org>
Reviewed-by: NJosh Triplett <josh@joshtriplett.org>
Cc: Paul Bolle <pebolle@tiscali.nl>
Cc: linux-kbuild@vger.kernel.org
Cc: netdev@vger.kernel.org
Cc: Michal Marek <mmarek@suse.com>
Cc: Edward Cree <ecree@solarflare.com>
Link: http://lkml.kernel.org/r/1478841010-28605-2-git-send-email-nicolas.pitre@linaro.orgSigned-off-by: NThomas Gleixner <tglx@linutronix.de>
      237e3ad0
  3. 11 5月, 2016 1 次提交
    • D
      kconfig/symbol.c: handle choice_values that depend on 'm' symbols · fa64e5f6
      由 Dirk Gouders 提交于 
      If choices consist of choice_values of type tristate that depend on
symbols set to 'm', those choice_values are not set to 'n' if the
choice is changed from 'm' to 'y' (in which case only one active
choice_value is allowed). Those values are also written to the config
file causing modules to be built when they should not.

The following config can be used to reproduce and examine the problem;
with the frontend of your choice set "Choice 0" and "Choice 1" to 'm',
then set "Tristate Choice" to 'y' and save the configuration:

config modules
	boolean modules
	default y
	option modules

config dependency
	tristate "Dependency"
	default m

choice
	prompt "Tristate Choice"
	default choice0

config choice0
	tristate "Choice 0"

config choice1
	tristate "Choice 1"
	depends on dependency

endchoice

This patch sets tristate choice_values' visibility that depend on
symbols set to 'm' to 'n' if the corresponding choice is set to 'y'.

This makes them disappear from the choice list and will also cause the
choice_values' value set to 'n' in sym_calc_value() and as a result
they are written as "not set" to the resulting .config file.
Reported-by: NSebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: NDirk Gouders <dirk@gouders.net>
Tested-by: NSebastian Andrzej Siewior <bigeasy@linutronix.de>
Tested-by: NRoger Quadros <rogerq@ti.com>
Signed-off-by: NMichal Marek <mmarek@suse.com>
      fa64e5f6
  5. 10 5月, 2016 1 次提交
  7. 27 4月, 2016 2 次提交
  9. 26 4月, 2016 4 次提交
  11. 01 2月, 2016 2 次提交
    • A
      unbreak allmodconfig KCONFIG_ALLCONFIG=... · 6b87b70c
      由 Al Viro 提交于 
      	Prior to 3.13 make allmodconfig KCONFIG_ALLCONFIG=/dev/null used
to be equivalent to make allmodconfig; these days it hardwires MODULES to n.
In fact, any KCONFIG_ALLCONFIG that doesn't set MODULES explicitly is
treated as if it set it to n.

	Regression had been introduced by commit cfa98f ("kconfig: do not
override symbols already set"); what happens is that conf_read_simple()
does sym_calc_value(modules_sym) on exit, which leaves SYMBOL_VALID set and
has conf_set_all_new_symbols() skip modules_sym.

	It's pretty easy to fix - simply move that call of sym_calc_value()
into the callers, except for the ones in KCONFIG_ALLCONFIG handling.
Objections?
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
Fixes: cfa98f2e ("kconfig: do not override symbols already set")
Signed-off-by: NMichal Marek <mmarek@suse.com>
      6b87b70c
    • J
      scripts/kconfig: allow building with make 3.80 again · 42f9d3c6
      由 Jan Beulich 提交于 
      Documentation/Changes still lists this as the minimal required version,
so it ought to remain usable for the time being.

Fixes: d2036f30 ("scripts/kconfig/Makefile: Allow KBUILD_DEFCONFIG to be a target")
Signed-off-by: NJan Beulich <jbeulich@suse.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: NMichal Marek <mmarek@suse.com>
      42f9d3c6
  13. 11 1月, 2016 1 次提交
  15. 05 1月, 2016 1 次提交
  17. 10 12月, 2015 1 次提交
  19. 03 11月, 2015 2 次提交
  21. 21 10月, 2015 1 次提交
  23. 15 10月, 2015 1 次提交
    • M
      scripts/kconfig/Makefile: Fix KBUILD_DEFCONFIG check when building with O= · bd960f09
      由 Michael Ellerman 提交于 
      My recent commit d2036f30 ("scripts/kconfig/Makefile: Allow
KBUILD_DEFCONFIG to be a target"), contained a bug in that when it
checks if KBUILD_DEFCONFIG is a file it forgets to prepend $(srctree) to
the path.

This causes the build to fail when building out of tree (with O=), and
when the value of KBUILD_DEFCONFIG is 'defconfig'. In that case we will
fail to find the 'defconfig' file, because we look in the build
directory not $(srctree), and so we will call Make again with
'defconfig' as the target. From there we loop infinitely calling 'make
defconfig' again and again.

The fix is simple, we need to look for the file under $(srctree).

Fixes: d2036f30 ("scripts/kconfig/Makefile: Allow KBUILD_DEFCONFIG to be a target")
Reported-by: NOlof Johansson <olof@lixom.net>
Acked-by: NMichal Marek <mmarek@suse.com>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
      bd960f09
  25. 14 10月, 2015 22 次提交