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From: Benjamin Herrenschmidt on 13 May 2010 22:40
On Thu, 2010-05-13 at 17:19 -0700, Yinghai Lu wrote:
> We can remove #ifdef in mm/page_alloc.c
>
> and change that function to static

Don't forget that nid allocation using your early_node_map[] will not
work properly on sparc due to the scattered nature of page locality.

Cheers,
Ben.

> Signed-off-by: Yinghai Lu <yinghai(a)kernel.org>
> ---
> include/linux/mm.h | 2 --
> mm/nobootmem.c | 21 +++++++++++++++++++++
> mm/page_alloc.c | 24 ------------------------
> 3 files changed, 21 insertions(+), 26 deletions(-)
>
> diff --git a/include/linux/mm.h b/include/linux/mm.h
> index 7774e1d..2a14361 100644
> --- a/include/linux/mm.h
> +++ b/include/linux/mm.h
> @@ -1161,8 +1161,6 @@ int add_from_early_node_map(struct range *range, int az,
> int nr_range, int nid);
> u64 __init find_memory_core_early(int nid, u64 size, u64 align,
> u64 goal, u64 limit);
> -void *__alloc_memory_core_early(int nodeid, u64 size, u64 align,
> - u64 goal, u64 limit);
> typedef int (*work_fn_t)(unsigned long, unsigned long, void *);
> extern void work_with_active_regions(int nid, work_fn_t work_fn, void *data);
> extern void sparse_memory_present_with_active_regions(int nid);
> diff --git a/mm/nobootmem.c b/mm/nobootmem.c
> index abaec96..e3cbde7 100644
> --- a/mm/nobootmem.c
> +++ b/mm/nobootmem.c
> @@ -40,6 +40,27 @@ unsigned long max_pfn;
> unsigned long saved_max_pfn;
> #endif
>
> +static void * __init __alloc_memory_core_early(int nid, u64 size, u64 align,
> + u64 goal, u64 limit)
> +{
> + void *ptr;
> +
> + u64 addr;
> +
> + if (limit > lmb.current_limit)
> + limit = lmb.current_limit;
> +
> + addr = find_memory_core_early(nid, size, align, goal, limit);
> +
> + if (addr == LMB_ERROR)
> + return NULL;
> +
> + ptr = phys_to_virt(addr);
> + memset(ptr, 0, size);
> + lmb_reserve_area(addr, addr + size, "BOOTMEM");
> + return ptr;
> +}
> +
> /*
> * free_bootmem_late - free bootmem pages directly to page allocator
> * @addr: starting address of the range
> diff --git a/mm/page_alloc.c b/mm/page_alloc.c
> index 867a3a8..3449811 100644
> --- a/mm/page_alloc.c
> +++ b/mm/page_alloc.c
> @@ -3437,30 +3437,6 @@ int __init add_from_early_node_map(struct range *range, int az,
> return nr_range;
> }
>
> -#ifdef CONFIG_NO_BOOTMEM
> -void * __init __alloc_memory_core_early(int nid, u64 size, u64 align,
> - u64 goal, u64 limit)
> -{
> - void *ptr;
> -
> - u64 addr;
> -
> - if (limit > lmb.current_limit)
> - limit = lmb.current_limit;
> -
> - addr = find_memory_core_early(nid, size, align, goal, limit);
> -
> - if (addr == LMB_ERROR)
> - return NULL;
> -
> - ptr = phys_to_virt(addr);
> - memset(ptr, 0, size);
> - lmb_reserve_area(addr, addr + size, "BOOTMEM");
> - return ptr;
> -}
> -#endif
> -
> -
> void __init work_with_active_regions(int nid, work_fn_t work_fn, void *data)
> {
> int i;


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