From: Tony Lindgren <tony@atomide.com>
To: Russell King - ARM Linux <linux@arm.linux.org.uk>
Cc: Kevin Hilman <khilman@deeprootsystems.com>,
Paul Walmsley <paul@pwsan.com>,
"Syed Mohammed, Khasim" <khasim@ti.com>,
"Gadiyar, Anand" <gadiyar@ti.com>,
"linux-arm-kernel@lists.arm.linux.org.uk"
<linux-arm-kernel@lists.arm.linux.org.uk>,
"linux-omap@vger.kernel.org" <linux-omap@vger.kernel.org>,
Juha Yrjola <juha.yrjola@solidboot.com>
Subject: Re: [PATCH] ARM: Do early I/O mapping if spinlock debugging is enabled (Re: [PATCH 3/4] ARM: OMAP3: Add support for 3430 SDP, v3)
Date: Thu, 2 Apr 2009 07:54:32 -0700 [thread overview]
Message-ID: <20090402145431.GL32530@atomide.com> (raw)
In-Reply-To: <20090402073819.GA4337@n2100.arm.linux.org.uk>
* Russell King - ARM Linux <linux@arm.linux.org.uk> [090402 00:38]:
> On Wed, Apr 01, 2009 at 05:00:56PM -0700, Tony Lindgren wrote:
> > Well turns out it's the same old bug again Juha tracked down earlier..
> >
> > If CONFIG_DEBUG_SPINLOCK is set, and CONFIG_DEBUG_LL is not set, the IO
> > does not get mapped. Juha's earlier patch is attached.
> >
> > Russell, got any better fixes in mind for this?
>
> No, and as I've said previously, the kernel assuming that sched_clock
> is usable before stuff has been initialized is a bug plain and simple.
>
> Your patch may fix OMAP, but it won't fix everything.
>
> It's just not going to be possible to make this work. spinlock debugging
> needs to stop using sched_clock.
Or maybe enable it later on like CONFIG_PRINTK_TIME was changed.
Tony
next prev parent reply other threads:[~2009-04-02 14:54 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-13 22:43 [PATCH 0/4] Omap board updates for merge window after 2.6.29 Tony Lindgren
2009-03-13 22:44 ` [PATCH 1/4] ARM: OMAP3: Add SMSC911X support to Overo platform (V2) Tony Lindgren
2009-03-15 15:38 ` Russell King - ARM Linux
2009-03-15 16:36 ` Steve Sakoman
2009-03-15 17:00 ` Russell King - ARM Linux
2009-03-15 17:13 ` Steve Sakoman
2009-03-15 17:37 ` Russell King - ARM Linux
2009-03-16 18:08 ` Tony Lindgren
2009-03-17 8:18 ` Steve.Glendinning
2009-03-13 22:46 ` [PATCH 2/4] ARM: OMAP3: Add ADS7846 touchscreen support to Overo platform Tony Lindgren
2009-03-16 20:38 ` [PATCH 2/4] ARM: OMAP3: Add ADS7846 touchscreen support to Overo platform, v2 Tony Lindgren
2009-03-16 21:57 ` Felipe Balbi
2009-03-24 3:54 ` [PATCH 2/4] ARM: OMAP3: Add ADS7846 touchscreen support to Overo platform, v3 Tony Lindgren
2009-03-13 22:47 ` [PATCH 3/4] ARM: OMAP3: Add support for 3430 SDP Tony Lindgren
2009-03-15 15:47 ` Russell King - ARM Linux
2009-03-15 15:48 ` Russell King - ARM Linux
2009-03-16 18:14 ` [PATCH 3/4] ARM: OMAP3: Add support for 3430 SDP, v2 Tony Lindgren
2009-03-16 18:22 ` [PATCH 3/4] ARM: OMAP3: Add support for 3430 SDP, v3 Tony Lindgren
2009-03-23 19:05 ` [PATCH 3/4] ARM: OMAP3: Add support for 3430 SDP, v4 Tony Lindgren
2009-03-31 11:42 ` [PATCH 3/4] ARM: OMAP3: Add support for 3430 SDP, v3 Gadiyar, Anand
2009-03-31 13:37 ` Gadiyar, Anand
2009-03-31 14:50 ` Tony Lindgren
2009-03-31 18:48 ` Russell King - ARM Linux
2009-04-01 8:25 ` Gadiyar, Anand
2009-04-01 8:47 ` Syed Mohammed, Khasim
2009-04-01 19:04 ` Paul Walmsley
2009-04-01 22:07 ` Tony Lindgren
2009-04-01 23:18 ` Kevin Hilman
2009-04-02 0:00 ` [PATCH] ARM: Do early I/O mapping if spinlock debugging is enabled (Re: [PATCH 3/4] ARM: OMAP3: Add support for 3430 SDP, v3) Tony Lindgren
2009-04-02 7:38 ` Russell King - ARM Linux
2009-04-02 14:54 ` Tony Lindgren [this message]
2009-04-02 4:33 ` [PATCH 3/4] ARM: OMAP3: Add support for 3430 SDP, v3 Pandita, Vikram
2009-04-02 20:01 ` Pandita, Vikram
2009-04-03 19:14 ` Paul Walmsley
2009-04-03 19:25 ` Gadiyar, Anand
2009-04-04 11:18 ` Gadiyar, Anand
2009-04-03 23:12 ` Kevin Hilman
2009-04-03 23:29 ` Paul Walmsley
2009-03-13 22:48 ` [PATCH 4/4] ARM OMAP3: Initial support for Nokia RX-51 Tony Lindgren
2009-03-15 15:47 ` Russell King - ARM Linux
2009-03-16 18:21 ` [PATCH 4/4] ARM OMAP3: Initial support for Nokia RX-51, v2 Tony Lindgren
2009-03-24 2:52 ` [PATCH 0/4] Omap board updates for merge window after 2.6.29 Tony Lindgren
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20090402145431.GL32530@atomide.com \
--to=tony@atomide.com \
--cc=gadiyar@ti.com \
--cc=juha.yrjola@solidboot.com \
--cc=khasim@ti.com \
--cc=khilman@deeprootsystems.com \
--cc=linux-arm-kernel@lists.arm.linux.org.uk \
--cc=linux-omap@vger.kernel.org \
--cc=linux@arm.linux.org.uk \
--cc=paul@pwsan.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox