[PATCH 1/3] e820_update_range(): Strip size of original region
Yinghai Lu
yhlu.kernel at gmail.com
Wed Jun 25 11:56:33 EDT 2008
On Wed, Jun 25, 2008 at 5:02 AM, Bernhard Walle <bwalle at suse.de> wrote:
> This patch fixes a bug in e820_update_range(): Previously, if a region was
> partially covered, then e820_update_range() only added a new E820 range but
> didn't update the end/size of the previous range. That lead to duplicate
> covering of a region.
>
> Patch tested on i386 and x86-64 with patch that uses e820_update_range()
> to limit the E820 map when "mem" parameter is specified on the command line.
>
>
> Signed-off-by: Bernhard Walle <bwalle at suse.de>
> ---
> arch/x86/kernel/e820.c | 1 +
> 1 files changed, 1 insertions(+), 0 deletions(-)
>
> diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
> index e285ea3..e466073 100644
> --- a/arch/x86/kernel/e820.c
> +++ b/arch/x86/kernel/e820.c
> @@ -422,6 +422,7 @@ u64 __init e820_update_range(u64 start, u64 size, unsigned old_type,
> final_end = min(start + size, ei->addr + ei->size);
> if (final_start >= final_end)
> continue;
> + ei->size -= final_end - final_start;
> e820_add_region(final_start, final_end - final_start,
> new_type);
> real_updated_size += final_end - final_start;
> --
this one is not needed, I sent one updated to Ingo, and it is in
tip/setup-memory
[PATCH] x86: change size if e820_update/remove_range
YH
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