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From: Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>
To: linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
Cc: Paul Gortmaker
	<paul.gortmaker-CWA4WttNNZF54TAoqtyWWQ@public.gmane.org>,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	Alexandre Courbot
	<gnurou-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
	linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	Stephen Warren <swarren-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>,
	Vinod Koul <vinod.koul-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
	Haojian Zhuang
	<haojian.zhuang-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
	Laxman Dewangan
	<ldewangan-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>,
	Thierry Reding
	<thierry.reding-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
	dmaengine-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	Dan Williams
	<dan.j.williams-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
	Robert Jarzmik <robert.jarzmik-GANU6spQydw@public.gmane.org>,
	Daniel Mack <daniel-cYrQPVfZoowdnm+yROfE0A@public.gmane.org>
Subject: Re: [PATCH 0/6] drivers/dma: drop modular code from non modular drivers
Date: Thu, 10 Dec 2015 00:29:27 +0100	[thread overview]
Message-ID: <7162994.ydt4N8UgZZ@wuerfel> (raw)
In-Reply-To: <1449703322-17762-1-git-send-email-paul.gortmaker-CWA4WttNNZF54TAoqtyWWQ@public.gmane.org>

On Wednesday 09 December 2015 18:21:56 Paul Gortmaker wrote:
> This series of commits is a slice of a larger project to ensure
> people don't have dead code for module removal in non-modular
> drivers.  Overall there is roughly 5k lines of dead code in the
> kernel due to this.
> 
> There is a quasi-separate theme, in that some of the drivers were
> allowing an unbind implicitly since it is enabled by default.  But
> for core DMA infrastructure drivers, this doesn't seem useful -- so
> we also disable that here which allows us to delete any ".remove"
> functions from the drivers that would otherwise be called during the
> (impossible to trigger) module removal.
> 
> Since ARM covers these files the best of all architectures, each
> file was build tested for allmodconfig on ARM, which at the same
> time confirms that the files are not built with "CC [M]" -- hence
> genuinely non-modular.
> 
> My testing and the larger patch series in general has been done
> against the latest linux-next tree.
> 
> 

We are in the process of changing the DMA drivers to a new way of
passing the "filter" function around. We can soon build them
all as loadable modules again.

	Arnd

WARNING: multiple messages have this Message-ID (diff)
From: Arnd Bergmann <arnd@arndb.de>
To: linux-arm-kernel@lists.infradead.org
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>,
	linux-kernel@vger.kernel.org,
	Alexandre Courbot <gnurou@gmail.com>,
	linux-tegra@vger.kernel.org,
	Stephen Warren <swarren@wwwdotorg.org>,
	Vinod Koul <vinod.koul@intel.com>,
	Haojian Zhuang <haojian.zhuang@gmail.com>,
	Laxman Dewangan <ldewangan@nvidia.com>,
	Thierry Reding <thierry.reding@gmail.com>,
	dmaengine@vger.kernel.org,
	Dan Williams <dan.j.williams@intel.com>,
	Robert Jarzmik <robert.jarzmik@free.fr>,
	Daniel Mack <daniel@zonque.org>
Subject: Re: [PATCH 0/6] drivers/dma: drop modular code from non modular drivers
Date: Thu, 10 Dec 2015 00:29:27 +0100	[thread overview]
Message-ID: <7162994.ydt4N8UgZZ@wuerfel> (raw)
In-Reply-To: <1449703322-17762-1-git-send-email-paul.gortmaker@windriver.com>

On Wednesday 09 December 2015 18:21:56 Paul Gortmaker wrote:
> This series of commits is a slice of a larger project to ensure
> people don't have dead code for module removal in non-modular
> drivers.  Overall there is roughly 5k lines of dead code in the
> kernel due to this.
> 
> There is a quasi-separate theme, in that some of the drivers were
> allowing an unbind implicitly since it is enabled by default.  But
> for core DMA infrastructure drivers, this doesn't seem useful -- so
> we also disable that here which allows us to delete any ".remove"
> functions from the drivers that would otherwise be called during the
> (impossible to trigger) module removal.
> 
> Since ARM covers these files the best of all architectures, each
> file was build tested for allmodconfig on ARM, which at the same
> time confirms that the files are not built with "CC [M]" -- hence
> genuinely non-modular.
> 
> My testing and the larger patch series in general has been done
> against the latest linux-next tree.
> 
> 

We are in the process of changing the DMA drivers to a new way of
passing the "filter" function around. We can soon build them
all as loadable modules again.

	Arnd

WARNING: multiple messages have this Message-ID (diff)
From: arnd@arndb.de (Arnd Bergmann)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 0/6] drivers/dma: drop modular code from non modular drivers
Date: Thu, 10 Dec 2015 00:29:27 +0100	[thread overview]
Message-ID: <7162994.ydt4N8UgZZ@wuerfel> (raw)
In-Reply-To: <1449703322-17762-1-git-send-email-paul.gortmaker@windriver.com>

On Wednesday 09 December 2015 18:21:56 Paul Gortmaker wrote:
> This series of commits is a slice of a larger project to ensure
> people don't have dead code for module removal in non-modular
> drivers.  Overall there is roughly 5k lines of dead code in the
> kernel due to this.
> 
> There is a quasi-separate theme, in that some of the drivers were
> allowing an unbind implicitly since it is enabled by default.  But
> for core DMA infrastructure drivers, this doesn't seem useful -- so
> we also disable that here which allows us to delete any ".remove"
> functions from the drivers that would otherwise be called during the
> (impossible to trigger) module removal.
> 
> Since ARM covers these files the best of all architectures, each
> file was build tested for allmodconfig on ARM, which at the same
> time confirms that the files are not built with "CC [M]" -- hence
> genuinely non-modular.
> 
> My testing and the larger patch series in general has been done
> against the latest linux-next tree.
> 
> 

We are in the process of changing the DMA drivers to a new way of
passing the "filter" function around. We can soon build them
all as loadable modules again.

	Arnd

  parent reply	other threads:[~2015-12-09 23:29 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-12-09 23:21 [PATCH 0/6] drivers/dma: drop modular code from non modular drivers Paul Gortmaker
2015-12-09 23:21 ` Paul Gortmaker
2015-12-09 23:21 ` Paul Gortmaker
2015-12-09 23:21 ` [PATCH 1/6] drivers/dma: make edma.c explicitly non-modular Paul Gortmaker
2015-12-09 23:21 ` [PATCH 2/6] drivers/dma: make mmp_pdma.c " Paul Gortmaker
2015-12-09 23:21 ` [PATCH 3/6] drivers/dma: make mmp_tdma.c " Paul Gortmaker
2015-12-09 23:22 ` [PATCH 4/6] drivers/dma: make pxa_dma.c " Paul Gortmaker
2015-12-09 23:22   ` Paul Gortmaker
2015-12-09 23:22 ` [PATCH 5/6] drivers/dma: make sh/shdma-*.c " Paul Gortmaker
2015-12-10  9:46   ` Geert Uytterhoeven
2015-12-09 23:22 ` [PATCH 6/6] drivers/dma: make tegra20-apb-dma.c " Paul Gortmaker
2015-12-09 23:22   ` Paul Gortmaker
     [not found] ` <1449703322-17762-1-git-send-email-paul.gortmaker-CWA4WttNNZF54TAoqtyWWQ@public.gmane.org>
2015-12-09 23:29   ` Arnd Bergmann [this message]
2015-12-09 23:29     ` [PATCH 0/6] drivers/dma: drop modular code from non modular drivers Arnd Bergmann
2015-12-09 23:29     ` Arnd Bergmann
2015-12-10  0:17     ` Paul Gortmaker
2015-12-10  0:17       ` Paul Gortmaker
2015-12-10  0:17       ` Paul Gortmaker
     [not found]       ` <20151210001741.GT22885-CWA4WttNNZF54TAoqtyWWQ@public.gmane.org>
2015-12-10  3:12         ` Vinod Koul
2015-12-10  3:12           ` Vinod Koul
2015-12-10  3:12           ` Vinod Koul
2015-12-10  9:01         ` Arnd Bergmann
2015-12-10  9:01           ` Arnd Bergmann
2015-12-10  9:01           ` Arnd Bergmann

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