From: "Luck, Tony" <tony.luck@intel.com>
To: Andi Kleen <ak@suse.de>
Cc: Steven Rostedt <rostedt@goodmis.org>, Ingo Molnar <mingo@elte.hu>,
Mark Knecht <markknecht@gmail.com>,
linux-kernel@vger.kernel.org, acpi-devel@lists.sourceforge.net
Subject: Re: 2.6.14-rc3-rt2
Date: Thu, 6 Oct 2005 09:25:28 -0700 [thread overview]
Message-ID: <20051006162528.GA6006@agluck-lia64.sc.intel.com> (raw)
In-Reply-To: <200510061204.33045.ak@suse.de>
> It's a theoretical only issue for mainline right now. The only architectures
> using the ACPI code are i386,x86-64,ia64. The first two are ok with
> truncating. The IA64 PSR is longer than 32bit, but unless I'm misreading the
> code they only care about the "i" bit which is also in the lower 32bit (Tony
> can probably confirm/deny)
Andi is right ... if you follow the "acpi_os_release_lock" trail, you
eventually get to include/asm-ia64/system.h with the following definition
for __local_irq_restore:
#define __local_irq_restore(x) ia64_intrin_local_irq_restore((x) & IA64_PSR_I)
and the IA64_PSR_I bit is bit 14 ... safely in the low 32 bits. So this is
a correct fix, but will have no effect on ia64.
-Tony
prev parent reply other threads:[~2005-10-06 16:25 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <5bdc1c8b0510041111n188b8e14lf5a1398406d30ec4@mail.gmail.com>
[not found] ` <20051006084920.GB22397@elte.hu>
[not found] ` <Pine.LNX.4.58.0510060544390.28535@localhost.localdomain>
2005-10-06 10:04 ` 2.6.14-rc3-rt2 Andi Kleen
2005-10-06 11:08 ` [PATCH] cleanup u32 flags in acpi spin_lock calls Steven Rostedt
2005-10-06 16:25 ` Luck, Tony [this message]
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