From: "Luis R. Rodriguez" <mcgrof@kernel.org>
To: "Luis R. Rodriguez" <mcgrof@kernel.org>
Cc: Cristina Moraru <cristina.moraru09@gmail.com>,
linux-kernel@vger.kernel.org, teg@jklm.no, kay@vrfy.org,
rusty@rustcorp.com.au, akpm@linux-foundation.org,
backports@vger.kernel.org,
"vegard.nossum@gmail.com" <vegard.nossum@gmail.com>,
Fengguang Wu <fengguang.wu@intel.com>,
Guenter Roeck <linux@roeck-us.net>,
Steven Rostedt <rostedt@goodmis.org>
Subject: Re: [RFC PATCH 2/5] Add CONFIG symbol to module as compilation parameter
Date: Thu, 18 Aug 2016 20:55:29 +0200 [thread overview]
Message-ID: <20160818185529.GS3296@wotan.suse.de> (raw)
In-Reply-To: <20160818181007.GN3296@wotan.suse.de>
On Thu, Aug 18, 2016 at 08:10:07PM +0200, Luis R. Rodriguez wrote:
> On Wed, Aug 17, 2016 at 09:27:00PM +0200, Cristina Moraru wrote:
>
> > Signed-off-by: Cristina Moraru <cristina.moraru09@gmail.com>
> > ---
> > scripts/Makefile.lib | 9 ++++++++-
> > 1 file changed, 8 insertions(+), 1 deletion(-)
> >
> > diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
> > index e7df0f5..8ae9b7f 100644
> > --- a/scripts/Makefile.lib
> > +++ b/scripts/Makefile.lib
> > @@ -89,6 +89,10 @@ multi-objs-m := $(addprefix $(obj)/,$(multi-objs-m))
> > subdir-ym := $(addprefix $(obj)/,$(subdir-ym))
> > obj-dirs := $(addprefix $(obj)/,$(obj-dirs))
> >
> > +# Include Module.ksymb which contains the associations of modules' names
> > +# and corresponding CONFIG_* options
> > +include Module.ksymb
>
> Is this file always generated? If not prefixing the include call with - would
> be better. If we are going to make this optional, then an ifdef wrapper would
> suffice as we know it'd be expected only if the new feature was enabled.
The ordering of the patches 2 and 3 seem to be backward, you should first
generate the file otherwise this patch will break the build as the file
is not present.
> > +
> > # These flags are needed for modversions and compiling, so we define them here
> > # already
> > # $(modname_flags) #defines KBUILD_MODNAME as the name of the module it will
> > @@ -100,6 +104,9 @@ name-fix = $(squote)$(quote)$(subst $(comma),_,$(subst -,_,$1))$(quote)$(squote)
> > basename_flags = -DKBUILD_BASENAME=$(call name-fix,$(basetarget))
> > modname_flags = $(if $(filter 1,$(words $(modname))),\
> > -DKBUILD_MODNAME=$(call name-fix,$(modname)))
> > +ksym-fix = $(squote)$(quote)$($(subst $(comma),_,$(subst -,_,$1))_KCONF)$(quote)$(squote)
> > +ksymb_flags = $(if $(filter 1,$(words $(modname))),\
> > + -DKBUILD_KSYMB=$(call ksym-fix, $(modname)))
>
> Are clashes possible with this formula? Can we end up with two results for instance?
> If not what prevents current konfig logic and namespace from a clash ? If we do
> not have anything to prevent a clash, what can we do to help make such clash not
> possible ?
To help test this I've added your patches to a development branch on my linux-next
tree to see if 0-day picks up any issues.
Guenter, to be even more thorough can I trouble you for a spin of this branch?
https://git.kernel.org/cgit/linux/kernel/git/mcgrof/linux-next.git/log/?h=20160818-gsoc-kconf_symb
Results should help give us an idea of troubling areas if this were to be added
as a new Kconfig feature even for R&D.
Luis
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next prev parent reply other threads:[~2016-08-19 0:54 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1471462023-119645-1-git-send-email-cristina.moraru09@gmail.com>
2016-08-18 17:55 ` [RFC PATCH 0/5] Add CONFIG symbol as module attribute Luis R. Rodriguez
2016-08-19 9:07 ` Michal Marek
2016-08-22 19:48 ` Cristina-Gabriela Moraru
2016-08-23 21:32 ` Luis R. Rodriguez
2016-08-24 11:05 ` Michal Marek
2016-08-24 16:33 ` Luis R. Rodriguez
2016-08-24 17:31 ` Naveen Kumar
2016-08-22 19:35 ` Cristina-Gabriela Moraru
2016-08-23 19:17 ` Luis R. Rodriguez
2016-08-25 7:43 ` Christoph Hellwig
2016-08-25 8:00 ` Johannes Berg
2016-08-25 19:51 ` Luis R. Rodriguez
2016-08-25 8:41 ` Michal Marek
2016-08-25 20:19 ` Luis R. Rodriguez
2019-02-05 22:07 ` Luis Chamberlain
2019-06-26 22:21 ` Luis Chamberlain
2019-06-27 4:50 ` Christoph Hellwig
2019-06-28 18:40 ` Luis Chamberlain
2019-06-29 8:42 ` Greg Kroah-Hartman
2019-07-02 20:51 ` Luis Chamberlain
2019-07-03 7:40 ` Greg Kroah-Hartman
2019-07-03 16:50 ` Luis Chamberlain
2019-07-03 18:57 ` Greg Kroah-Hartman
2019-07-03 22:25 ` Luis Chamberlain
2019-07-11 23:07 ` Brendan Higgins
2019-07-11 23:22 ` Luis Chamberlain
2019-07-03 12:16 ` Enrico Weigelt, metux IT consult
2019-07-03 17:35 ` Luis Chamberlain
2019-07-03 19:31 ` Enrico Weigelt, metux IT consult
2019-07-03 22:42 ` Luis Chamberlain
2019-07-11 23:27 ` Brendan Higgins
2019-07-13 14:44 ` Enrico Weigelt, metux IT consult
[not found] ` <1471462023-119645-3-git-send-email-cristina.moraru09@gmail.com>
2016-08-18 18:10 ` [RFC PATCH 2/5] Add CONFIG symbol to module as compilation parameter Luis R. Rodriguez
2016-08-18 18:55 ` Luis R. Rodriguez [this message]
2016-08-20 15:11 ` Cristina-Gabriela Moraru
2016-08-23 19:07 ` Luis R. Rodriguez
[not found] ` <1471462023-119645-2-git-send-email-cristina.moraru09@gmail.com>
2016-08-18 18:22 ` [RFC PATCH 1/5] Add generation of Module.symb in streamline_config Luis R. Rodriguez
2016-08-18 18:32 ` Luis R. Rodriguez
[not found] ` <CAGZ2q2xi9Uy-ye387=mWhy_fOEJBC593Nos7fH027m-_ZdoOXA@mail.gmail.com>
2016-08-20 14:49 ` Cristina-Gabriela Moraru
2016-08-23 19:00 ` Luis R. Rodriguez
[not found] ` <1471462023-119645-4-git-send-email-cristina.moraru09@gmail.com>
2016-08-18 18:30 ` [RFC PATCH 3/5] Trigger Module.ksymb generation in Makefile Luis R. Rodriguez
[not found] ` <1471462023-119645-5-git-send-email-cristina.moraru09@gmail.com>
2016-08-18 18:59 ` [RFC PATCH 4/5] Set KCONFIG_KSYMB as value for kconfig_ksymb module attribute Luis R. Rodriguez
2016-08-20 15:16 ` Cristina-Gabriela Moraru
2016-08-23 19:10 ` Luis R. Rodriguez
[not found] ` <1471462023-119645-6-git-send-email-cristina.moraru09@gmail.com>
2016-08-18 19:02 ` [RFC PATCH 5/5] Add kconf_symb as kernel " Luis R. Rodriguez
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