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[PATCH 0/2] cpumask fallout: Initialize irq_default_affinity earlier et

To: Linus Torvalds <torvalds@linux-foundation.org>, Rusty Russell <rusty@rustcorp.com.au>
Subject: [PATCH 0/2] cpumask fallout: Initialize irq_default_affinity earlier et al.
From: David Daney <ddaney@caviumnetworks.com>
Date: Thu, 08 Jan 2009 14:53:04 -0800
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, Mike Travis <travis@sgi.com>, linux-mips <linux-mips@linux-mips.org>
Original-recipient: rfc822;linux-mips@linux-mips.org
Sender: linux-mips-bounce@linux-mips.org
User-agent: Thunderbird 2.0.0.19 (X11/20090105)

As I said in 2/2:

   Move the initialization of irq_default_affinity to early_irq_init
   as core_initcall is too late.

   irq_default_affinity can be used in init_IRQ and potentially timer
   and SMP init as well.  All of these happen before core_initcall.
   Moving the initialization to early_irq_init ensures that it is
   initialized before it is used.

Mike Travis pointed out that irq_default_affinity depends on
CONFIG_GENERIC_HARDIRQS in addition to CONFIG_SMP.  So to make things
consistent, I added 1/2 so that the irq_*_affinity functions and
irq_default_affinity are defined for the same conditions that they are
declared.

I Took Linus' suggestion to move init_irq_default_affinity over to
kernel/irq/handle.c, however due to the way that cpumask_*() are
defined, it is still necessary to have the ugly ifdefs, but now they
are localized to init_irq_default_affinity.

Mike Travis also suggested that alloc_bootmem_cpumask_var() be used in
preference to alloc_cpumask_var, so I incorporated that suggestion as
well.

I tested both with and without CONFIG_SMP, on mips/cavium_octeon, Mike
tested a similar(but not identical patch) on x86_64.

I will reply with the two patches.

David Daney (2):
 Make irq_*_affinity depend on CONFIG_GENERIC_HARDIRQS too.
 cpumask fallout: Initialize irq_default_affinity earlier (v2).

kernel/irq/handle.c |   12 ++++++++++++
kernel/irq/manage.c |   10 +---------
2 files changed, 13 insertions(+), 9 deletions(-)


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