[PATCH] makedumpfile: fix bug on is_sparsemem_extreme

[Atsushi Kumagai]

>The kernel gets the length of mem_section use this
>from: include/linux/mmzone.h:1134
>
> "#define NR_SECTION_ROOTS  DIV_ROUND_UP(NR_MEM_SECTIONS,
>					 SECTIONS_PER_ROOT)"
>
>But when we check the memory model. We forget the
>"DIV_ROUND_UP" method.
>
>So when 32-bit ARM linux is in sparsemem_extreme memory:
> with SECTION_SIZE_BIT=28 and 16 byte-size mem_section.
>The makedumpfile can not  identify the memory correctly.
>
>This patch introduce the "DIV_ROUND_UP" method in this check.

Thanks, I'll merge this patch into v1.5.7.

Atsushi Kumagai

>Signed-off-by: Liu Hua <sdu.liu at huawei.com>
>---
> makedumpfile.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
>diff --git a/makedumpfile.c b/makedumpfile.c
>index 0b31932..16081a5 100644
>--- a/makedumpfile.c
>+++ b/makedumpfile.c
>@@ -1599,7 +1599,7 @@ int
> is_sparsemem_extreme(void)
> {
> 	if (ARRAY_LENGTH(mem_section)
>-	     == (NR_MEM_SECTIONS() / _SECTIONS_PER_ROOT_EXTREME()))
>+	     == divideup(NR_MEM_SECTIONS(), _SECTIONS_PER_ROOT_EXTREME()))
> 		return TRUE;
> 	else
> 		return FALSE;
>--
>1.9.0