On Tue, 18 Dec 2007 13:03:00 +0100 (CET) Thomas Bogendoerfer <[email protected]> wrote:
> When using FLAT_MEMORY and ARCH_PFN_OFFSET is not 0, the kernel
> crashes in memmap_init_zone(). This bug got introduced by
> commit c713216deebd95d2b0ab38fef8bb2361c0180c2d
>
> Signed-off-by: Thomas Bogendoerfer <[email protected]>
> ---
>
> mm/page_alloc.c | 2 +-
> 1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/mm/page_alloc.c b/mm/page_alloc.c
> index b5a58d4..496f7f3 100644
> --- a/mm/page_alloc.c
> +++ b/mm/page_alloc.c
> @@ -3427,7 +3427,7 @@ static void __init_refok alloc_node_mem_map(struct pglist_data *pgdat)
> mem_map = NODE_DATA(0)->node_mem_map;
> #ifdef CONFIG_ARCH_POPULATES_NODE_MAP
> if (page_to_pfn(mem_map) != pgdat->node_start_pfn)
> - mem_map -= pgdat->node_start_pfn;
> + mem_map -= (pgdat->node_start_pfn - ARCH_PFN_OFFSET);
> #endif /* CONFIG_ARCH_POPULATES_NODE_MAP */
> }
> #endif
hm. It's rather non-trivial to verify that this will compile OK on all
architectures.
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