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SubjectRe: [PATCH -v6] x86: do not free zero sized per cpu areas
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Looks good to me, thanks Yinghai.

On Sat, 2010-03-20 at 06:38 +0000, Yinghai Lu wrote:
> From: Ian Campbell <ian.campbell@citrix.com>
>
> This avoids an infinite loop in free_early_partial().
>
> Add a warning to free_early_partial to catch future problems.
>
> -v5: put back start > end back into WARN_ONCE()
> -v6: use one line for if according to linus
>
> Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
> Signed-off-by: Yinghai Lu <yinghai@kernel.org>
> Cc: Peter Zijlstra <peterz@infradead.org>
> Cc: Ingo Molnar <mingo@elte.hu>
> ---
> kernel/early_res.c | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> Index: linux-2.6/kernel/early_res.c
> ===================================================================
> --- linux-2.6.orig/kernel/early_res.c
> +++ linux-2.6/kernel/early_res.c
> @@ -333,6 +333,12 @@ void __init free_early_partial(u64 start
> struct early_res *r;
> int i;
>
> + if (start == end)
> + return;
> +
> + if (WARN_ONCE(start > end, "free_early_partial: wrong range [%#llx, %#llx]\n", start, end))
> + return;
> +
> try_next:
> i = find_overlapped_early(start, end);
> if (i >= max_early_res)




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