From: Ingo Molnar <mingo@elte.hu>
To: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Yinghai Lu <yhlu.kernel@gmail.com>,
linux-kernel@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>,
"H. Peter Anvin" <hpa@zytor.com>
Subject: Re: [PATCH 6 of 7] x86: use early_ioremap in __acpi_map_table
Date: Fri, 12 Sep 2008 11:49:55 +0200 [thread overview]
Message-ID: <20080912094955.GB14201@elte.hu> (raw)
In-Reply-To: <48C9889B.7090901@goop.org>
* Jeremy Fitzhardinge <jeremy@goop.org> wrote:
> Yinghai Lu wrote:
> > void __iomem *__init_refok
> > acpi_os_map_memory(acpi_physical_address phys, acpi_size size)
> > {
> > if (phys > ULONG_MAX) {
> > printk(KERN_ERR PREFIX "Cannot map memory that high\n");
> > return NULL;
> > }
> > if (acpi_gbl_permanent_mmap)
> > /*
> > * ioremap checks to ensure this is in reserved space
> > */
> > return ioremap((unsigned long)phys, size);
> > else
> > return __acpi_map_table((unsigned long)phys, size);
> > }
> > EXPORT_SYMBOL_GPL(acpi_os_map_memory);
> >
> > void acpi_os_unmap_memory(void __iomem * virt, acpi_size size)
> > {
> > if (acpi_gbl_permanent_mmap) {
> > iounmap(virt);
> > }
> > }
> > EXPORT_SYMBOL_GPL(acpi_os_unmap_memory);
> >
> > just let acpi_os_unmap_memory to call __acpi_unmap_table...
> >
>
> That was my first attempt. Unfortunately a lot of the acpi code seems
> pretty sloppy about unmapping its tables, and basically relies on
> __acpi_map_table's current behaviour of removing the previous mapping
> when creating the new mapping.
could we just emit a WARN_ON_ONCE() warning when we have to remove a
previous mapping, so that the ACPI code can be fixed eventually?
Ingo
next prev parent reply other threads:[~2008-09-12 9:50 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-09-07 22:21 [PATCH 0 of 7] x86: lay groundwork for Xen domain 0 support Jeremy Fitzhardinge
2008-09-07 22:21 ` [PATCH 1 of 7] x86: add _PAGE_IOMAP pte flag for IO mappings Jeremy Fitzhardinge
2008-09-09 13:32 ` Avi Kivity
2008-09-09 14:47 ` Jeremy Fitzhardinge
2008-09-09 14:56 ` Avi Kivity
2008-09-09 15:29 ` [Xen-devel] " Keir Fraser
2008-09-09 15:48 ` Jeremy Fitzhardinge
2008-09-09 16:05 ` Keir Fraser
2008-09-10 9:55 ` Avi Kivity
2008-09-10 16:38 ` Jeremy Fitzhardinge
2008-09-10 16:55 ` Nick Piggin
2008-09-10 17:27 ` Jeremy Fitzhardinge
2008-09-07 22:21 ` [PATCH 2 of 7] x86: remove duplicate early_ioremap declarations Jeremy Fitzhardinge
2008-09-07 22:21 ` [PATCH 3 of 7] x86: add early_memremap() Jeremy Fitzhardinge
2008-09-07 22:21 ` [PATCH 4 of 7] x86: use early_memremap() in setup.c Jeremy Fitzhardinge
2008-09-07 22:21 ` [PATCH 5 of 7] x86-64: don't check for map replacement Jeremy Fitzhardinge
2008-09-07 22:21 ` [PATCH 6 of 7] x86: use early_ioremap in __acpi_map_table Jeremy Fitzhardinge
2008-09-07 23:44 ` Andi Kleen
2008-09-08 0:03 ` Jeremy Fitzhardinge
2008-09-08 14:26 ` Ingo Molnar
2008-09-08 16:29 ` Jeremy Fitzhardinge
2008-09-08 19:41 ` Jeremy Fitzhardinge
2008-09-10 11:55 ` Ingo Molnar
2008-09-10 16:49 ` Jeremy Fitzhardinge
2008-09-11 7:33 ` Ingo Molnar
2008-09-11 18:36 ` Jeremy Fitzhardinge
2008-09-11 18:56 ` Ingo Molnar
2008-09-11 20:34 ` Yinghai Lu
2008-09-11 21:07 ` Jeremy Fitzhardinge
2008-09-12 9:49 ` Ingo Molnar [this message]
2008-09-12 17:31 ` Yinghai Lu
[not found] ` <20080911125748.GA14698@elte.hu>
2008-09-11 21:33 ` [PATCH] acpi: remove final __acpi_map_table mapping before setting acpi_gbl_permanent_mmap Jeremy Fitzhardinge
2008-09-07 22:21 ` [PATCH 7 of 7] x86: always explicitly map acpi memory Jeremy Fitzhardinge
2008-09-07 23:35 ` [Xen-devel] " Yinghai Lu
2008-09-08 0:02 ` Jeremy Fitzhardinge
2008-09-08 0:14 ` Yinghai Lu
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