From: Russell King - ARM Linux <linux-lFZ/pmaqli7XmaaqVzeoHQ@public.gmane.org>
To: Lorenzo Pieralisi <lorenzo.pieralisi-5wv7dgnIgG8@public.gmane.org>
Cc: Nicolas Pitre
<nicolas.pitre-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
Kukjin Kim <kgene.kim-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>,
Pawel Moll <Pawel.Moll-5wv7dgnIgG8@public.gmane.org>,
devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org,
Magnus Damm <magnus.damm-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Rob Herring <rob.herring-bsGFqQB8/DxBDgjK7y7TUQ@public.gmane.org>,
David Brown <davidb-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
Hiroshi Doyu <hdoyu-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
Subject: Re: [PATCH] ARM: kernel: DT cpu map validity check helper function
Date: Fri, 11 Jan 2013 16:30:57 +0000 [thread overview]
Message-ID: <20130111163057.GE23505@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <1357921058-11322-1-git-send-email-lorenzo.pieralisi-5wv7dgnIgG8@public.gmane.org>
On Fri, Jan 11, 2013 at 04:17:38PM +0000, Lorenzo Pieralisi wrote:
> This patch implements a helper function that platforms can call to check
> whether DT based cpu map initialization and cores count were completed
> successfully.
Umm, are you sure this works? Two problems here:
- the kernel boot marks the booting CPU (in our case, CPU0) as present,
possible and online before arch code gets called. smp_init_cpus()
will be called with the maps already initialized per that.
- this really needs to be paired with a patch showing how you intend it
to be used; merely adding the helper without any sign of it being used
means it's just bloat which may not end up being used.
next prev parent reply other threads:[~2013-01-11 16:30 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-11 16:17 [PATCH] ARM: kernel: DT cpu map validity check helper function Lorenzo Pieralisi
[not found] ` <1357921058-11322-1-git-send-email-lorenzo.pieralisi-5wv7dgnIgG8@public.gmane.org>
2013-01-11 16:30 ` Russell King - ARM Linux [this message]
2013-01-11 17:20 ` Lorenzo Pieralisi
-- strict thread matches above, loose matches on Subject: below --
2013-01-10 11:48 Lorenzo Pieralisi
[not found] ` <1357818507-8716-1-git-send-email-lorenzo.pieralisi-5wv7dgnIgG8@public.gmane.org>
2013-01-10 12:15 ` Dave Martin
2013-01-10 12:33 ` Lorenzo Pieralisi
[not found] ` <20130110123321.GD4728-7AyDDHkRsp3ZROr8t4l/smS4ubULX0JqMm0uRHvK7Nw@public.gmane.org>
2013-01-10 16:16 ` Nicolas Pitre
2013-01-11 10:03 ` Lorenzo Pieralisi
2013-01-10 16:43 ` Rob Herring
2013-01-11 9:59 ` Lorenzo Pieralisi
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