linux-kernel - Re: [PATCH 0/4] sh: fix up modular use in non-modular code

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Message-ID: <20160702234018.GU26134@windriver.com>
Date:	Sat, 2 Jul 2016 19:40:18 -0400
From:	Paul Gortmaker <paul.gortmaker@...driver.com>
To:	Yoshinori Sato <ysato@...rs.sourceforge.jp>
CC:	Rich Felker <dalias@...c.org>, <linux-kernel@...r.kernel.org>,
	<linux-sh@...r.kernel.org>
Subject: Re: [PATCH 0/4] sh: fix up modular use in non-modular code

[Re: [PATCH 0/4] sh: fix up modular use in non-modular code] On 02/06/2016 (Thu 15:54) Yoshinori Sato wrote:

> On Fri, 27 May 2016 01:53:34 +0900,
> Rich Felker wrote:
> > 
> > On Thu, May 26, 2016 at 12:45:57PM -0400, Paul Gortmaker wrote:
> > > [[PATCH 0/4] sh: fix up modular use in non-modular code] On 22/04/2016 (Fri 14:07) Paul Gortmaker wrote:
> > > 
> > > > For anyone new to the underlying goal of this cleanup, we are trying to
> > > > make kernel code consistent with the Makefiles/Kconfigs that control them.
> > > 
> > > Ping -- wondering if there are any issues here, or if I can expect these
> > > to be merged upstream in the merge window.  I didn't see them loop
> > > around via the linux-next tree but I wasn't sure if arch/sh has a repo
> > > for linux-next.
> > 
> > I don't have experience with the affected code, but it looks ok unless
> > any of these "should" be modular and Kconfig was just wrong to
> > disallow it.
> > 
> > Sato-san, do you have an opinion on these? Should I go ahead and just
> > merge them?
> 
> It looks no problem.
> I think can merge it.

Just checking in a month later; my queue that I test regularly against
the linux-next tree still has these:

sh-make-heartbeat-driver-explicitly-non-modular.patch
sh-make-board-secureedge5410.c-explicitly-non-m.patch
sh-make-mm-asids-debugfs-explicitly-non-modular.patch
sh-make-time.c-explicitly-non-modular.patch

Apologies in advance if you have a sh queue that is pending but for some
reason is not fed into the nightly linux-next tree generation.  If so,
let me know and I won't worry about looking for these until merge window.

Thanks,
Paul.
--

> 
> > Rich
> > 
> > > > This means not using modular functions/macros for code that can never
> > > > be built as a module.  Some of the other downfalls this leads to are:
> > > > 
> > > >  (1) it is easy to accidentally write unused module_exit and remove code
> > > >  (2) it can be misleading when reading the source, thinking it can be
> > > >      modular when the Makefile and/or Kconfig prohibit it
> > > >  (3) it requires the include of the module.h header file which in turn
> > > >      includes nearly everything else, thus adding to CPP overhead.
> > > >  (4) it gets copied/replicated into other drivers and spreads like weeds.
> > > > 
> > > > Three of the four commits here are completely trivial with zero runtime
> > > > impact whatsoever.  The fourth has a deletion of a ".remove" function
> > > > and as we've done elsewhere, we block the sysfs ability to reach in and
> > > > manually execute that function, since there isn't a sane use case for
> > > > which doing that makes sense.
> > > > 
> > > > Build tested on today's linux-next ; full build fails on duplicate syms
> > > > from OF generic board, but that is a known and reported issue elsewhere;
> > > > it has nothing to do with the changes here.
> > > > 
> > > > Paul
> > > > --
> > > > 
> > > > Cc: linux-sh@...r.kernel.org
> > > > Cc: Paul Gortmaker <paul.gortmaker@...driver.com>
> > > > Cc: Rich Felker <dalias@...c.org>
> > > > Cc: Yoshinori Sato <ysato@...rs.sourceforge.jp>
> > > > 
> > > > 
> > > > Paul Gortmaker (4):
> > > >   sh: make time.c explicitly non-modular
> > > >   sh: make mm/asids-debugfs explicitly non-modular
> > > >   sh: make board-secureedge5410 explicitly non-modular
> > > >   sh: make heartbeat driver explicitly non-modular
> > > > 
> > > >  arch/sh/boards/board-secureedge5410.c |  3 +--
> > > >  arch/sh/drivers/heartbeat.c           | 32 +++-----------------------------
> > > >  arch/sh/kernel/time.c                 |  3 +--
> > > >  arch/sh/mm/asids-debugfs.c            |  5 +----
> > > >  4 files changed, 6 insertions(+), 37 deletions(-)
> > > > 
> > > > -- 
> > > > 2.8.0
> > > > 
> > > --
> > > To unsubscribe from this list: send the line "unsubscribe linux-sh" in
> > > the body of a message to majordomo@...r.kernel.org
> > > More majordomo info at  http://vger.kernel.org/majordomo-info.html
> 
> -- 
> Yoshinori Sato
> <ysato@...rs.sourceforge.jp>