From: Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>
To: Stephen Warren <swarren-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
Cc: John Stultz <johnstul-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>,
Thomas Gleixner <tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>,
Grant Likely
<grant.likely-s3s/WqlpOiPyB63q8FvJNQ@public.gmane.org>,
Rob Herring <rob.herring-bsGFqQB8/DxBDgjK7y7TUQ@public.gmane.org>,
Olof Johansson <olof-nZhT3qVonbNeoWH0uzbU5w@public.gmane.org>,
Josh Cartwright
<josh.cartwright-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Thomas Petazzoni
<thomas.petazzoni-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Stephen Warren <swarren-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
Subject: Re: [PATCH V4 1/3] of: introduce for_each_matching_node_and_match()
Date: Wed, 21 Nov 2012 09:53:20 +0000 [thread overview]
Message-ID: <201211210953.20552.arnd@arndb.de> (raw)
In-Reply-To: <1353453142-4973-1-git-send-email-swarren-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
On Tuesday 20 November 2012, Stephen Warren wrote:
> However, this results in iterating over table twice; the second time
> inside of_match_node(). The implementation of for_each_matching_node()
> already found the match, so this is redundant. Invent new function
> of_find_matching_node_and_match() and macro
> for_each_matching_node_and_match() to remove the double iteration,
> thus transforming the above code to:
>
> for_each_matching_node_and_match(np, table, &match)
>
> Signed-off-by: Stephen Warren <swarren-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
This look useful, but I wonder if the interface would make more sense if you
make the last argument to the macro a normal pointer, rather than a
pointer-to-pointer. You can take the reference as part of the macro.
Arnd
WARNING: multiple messages have this Message-ID (diff)
From: arnd@arndb.de (Arnd Bergmann)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH V4 1/3] of: introduce for_each_matching_node_and_match()
Date: Wed, 21 Nov 2012 09:53:20 +0000 [thread overview]
Message-ID: <201211210953.20552.arnd@arndb.de> (raw)
In-Reply-To: <1353453142-4973-1-git-send-email-swarren@wwwdotorg.org>
On Tuesday 20 November 2012, Stephen Warren wrote:
> However, this results in iterating over table twice; the second time
> inside of_match_node(). The implementation of for_each_matching_node()
> already found the match, so this is redundant. Invent new function
> of_find_matching_node_and_match() and macro
> for_each_matching_node_and_match() to remove the double iteration,
> thus transforming the above code to:
>
> for_each_matching_node_and_match(np, table, &match)
>
> Signed-off-by: Stephen Warren <swarren@nvidia.com>
This look useful, but I wonder if the interface would make more sense if you
make the last argument to the macro a normal pointer, rather than a
pointer-to-pointer. You can take the reference as part of the macro.
Arnd
WARNING: multiple messages have this Message-ID (diff)
From: Arnd Bergmann <arnd@arndb.de>
To: Stephen Warren <swarren@wwwdotorg.org>
Cc: John Stultz <johnstul@us.ibm.com>,
Thomas Gleixner <tglx@linutronix.de>,
Grant Likely <grant.likely@secretlab.ca>,
Rob Herring <rob.herring@calxeda.com>,
Olof Johansson <olof@lixom.net>,
Josh Cartwright <josh.cartwright@gmail.com>,
Thomas Petazzoni <thomas.petazzoni@free-electrons.com>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-tegra@vger.kernel.org,
Stephen Warren <swarren@nvidia.com>
Subject: Re: [PATCH V4 1/3] of: introduce for_each_matching_node_and_match()
Date: Wed, 21 Nov 2012 09:53:20 +0000 [thread overview]
Message-ID: <201211210953.20552.arnd@arndb.de> (raw)
In-Reply-To: <1353453142-4973-1-git-send-email-swarren@wwwdotorg.org>
On Tuesday 20 November 2012, Stephen Warren wrote:
> However, this results in iterating over table twice; the second time
> inside of_match_node(). The implementation of for_each_matching_node()
> already found the match, so this is redundant. Invent new function
> of_find_matching_node_and_match() and macro
> for_each_matching_node_and_match() to remove the double iteration,
> thus transforming the above code to:
>
> for_each_matching_node_and_match(np, table, &match)
>
> Signed-off-by: Stephen Warren <swarren@nvidia.com>
This look useful, but I wonder if the interface would make more sense if you
make the last argument to the macro a normal pointer, rather than a
pointer-to-pointer. You can take the reference as part of the macro.
Arnd
next prev parent reply other threads:[~2012-11-21 9:53 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-20 23:12 [PATCH V4 1/3] of: introduce for_each_matching_node_and_match() Stephen Warren
2012-11-20 23:12 ` Stephen Warren
2012-11-20 23:12 ` Stephen Warren
[not found] ` <1353453142-4973-1-git-send-email-swarren-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
2012-11-20 23:12 ` [PATCH V4 2/3] clocksource: add common of_clksrc_init() function Stephen Warren
2012-11-20 23:12 ` Stephen Warren
2012-11-20 23:12 ` Stephen Warren
[not found] ` <1353453142-4973-2-git-send-email-swarren-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
2013-01-02 18:16 ` Stephen Warren
2013-01-02 18:16 ` Stephen Warren
2013-01-02 18:16 ` Stephen Warren
2012-11-20 23:12 ` [PATCH V4 3/3] ARM: tegra: move timer.c to drivers/clocksource/ Stephen Warren
2012-11-20 23:12 ` Stephen Warren
2012-11-20 23:12 ` Stephen Warren
[not found] ` <1353453142-4973-3-git-send-email-swarren-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
2013-01-02 18:21 ` Stephen Warren
2013-01-02 18:21 ` Stephen Warren
2013-01-02 18:21 ` Stephen Warren
2012-11-20 23:52 ` [PATCH V4 1/3] of: introduce for_each_matching_node_and_match() Rob Herring
2012-11-20 23:52 ` Rob Herring
2012-11-20 23:52 ` Rob Herring
2012-11-21 9:53 ` Arnd Bergmann [this message]
2012-11-21 9:53 ` Arnd Bergmann
2012-11-21 9:53 ` Arnd Bergmann
[not found] ` <201211210953.20552.arnd-r2nGTMty4D4@public.gmane.org>
2012-11-21 10:06 ` Grant Likely
2012-11-21 10:06 ` Grant Likely
2012-11-21 10:06 ` Grant Likely
2012-11-21 10:09 ` Thomas Petazzoni
2012-11-21 10:09 ` Thomas Petazzoni
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