linux-kernel - Re: [PATCH v5 1/8] smp: Introduce a generic on_each_cpu

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Message-ID: <op.v7hz3pbc3l0zgt@mpn-glaptop>
Date:	Tue, 03 Jan 2012 08:51:15 +0100
From:	"Michal Nazarewicz" <mina86@...a86.com>
To:	linux-kernel@...r.kernel.org,
	"Gilad Ben-Yossef" <gilad@...yossef.com>
Cc:	"Chris Metcalf" <cmetcalf@...era.com>,
	"Peter Zijlstra" <a.p.zijlstra@...llo.nl>,
	"Frederic Weisbecker" <fweisbec@...il.com>,
	"Russell King" <linux@....linux.org.uk>, linux-mm@...ck.org,
	"Pekka Enberg" <penberg@...nel.org>,
	"Matt Mackall" <mpm@...enic.com>, "Rik van Riel" <riel@...hat.com>,
	"Andi Kleen" <andi@...stfloor.org>,
	"Sasha Levin" <levinsasha928@...il.com>,
	"Mel Gorman" <mel@....ul.ie>,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	"Alexander Viro" <viro@...iv.linux.org.uk>,
	linux-fsdevel@...r.kernel.org, "Avi Kivity" <avi@...hat.com>
Subject: Re: [PATCH v5 1/8] smp: Introduce a generic on_each_cpu_mask function

On Mon, 02 Jan 2012 11:24:12 +0100, Gilad Ben-Yossef <gilad@...yossef.com> wrote:
> @@ -102,6 +102,13 @@ static inline void call_function_init(void) { }
>  int on_each_cpu(smp_call_func_t func, void *info, int wait);
> /*
> + * Call a function on processors specified by mask, which might include
> + * the local one.
> + */
> +void on_each_cpu_mask(const struct cpumask *mask, void (*func)(void *),
> +		void *info, bool wait);
> +

on_each_cpu() returns an int.  For consistency reasons, would it make sense to
make on_each_cpu_maks() to return and int?  I know that the difference is that
smp_call_function() returns and int and smp_call_function_many() returns void,
but to me it actually seems strange and either I'm missing something important
(which is likely) or this needs to get cleaned up at one point as well.

> +/*
>   * Mark the boot cpu "online" so that it can call console drivers in
>   * printk() and can access its per-cpu storage.
>   */

-- 
Best regards,                                         _     _
.o. | Liege of Serenely Enlightened Majesty of      o' \,=./ `o
..o | Computer Science,  Michał “mina86” Nazarewicz    (o o)
ooo +----<email/xmpp: mpn@...gle.com>--------------ooO--(_)--Ooo--
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