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SubjectRe: fix aperture vs. suspend problem
On Thu, 13 Mar 2008 11:05:31 +0100
Pavel Machek <pavel@ucw.cz> wrote:

>
> aperture_64.c takes a piece of memory and makes it into iommu
> window... but such window may not be saved by swsusp -- that leads to
> oops during suspend.
>
> Signed-off-by: Pavel Machek <pavel@suse.cz>
>
> diff --git a/arch/x86/kernel/aperture_64.c b/arch/x86/kernel/aperture_64.c
> index 608152a..88747f3 100644
> --- a/arch/x86/kernel/aperture_64.c
> +++ b/arch/x86/kernel/aperture_64.c
> @@ -18,6 +18,7 @@ #include <linux/pci_ids.h>
> #include <linux/pci.h>
> #include <linux/bitops.h>
> #include <linux/ioport.h>
> +#include <linux/suspend.h>
> #include <asm/e820.h>
> #include <asm/io.h>
> #include <asm/gart.h>
> @@ -76,6 +77,7 @@ static u32 __init allocate_aperture(void
> printk(KERN_INFO "Mapping aperture over %d KB of RAM @ %lx\n",
> aper_size >> 10, __pa(p));
> insert_aperture_resource((u32)__pa(p), aper_size);
> + register_nosave_region((u32)__pa(p) >> PAGE_SHIFT, (u32)__pa(p+aper_size) >> PAGE_SHIFT);
>
> return (u32)__pa(p);
> }
>

This is also needed in 2.6.24, perhaps earlier?


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