[RESEND PATCH] makedumpfile: get MAX_PHYSMEM_BITS and SECTION_SIZE_BITS from vmcore

[Atsushi Kumagai]

>Now we define MAX_PHYSMEM_BITS and SECTION_SIZE_BITS as
>macros. But for ARM32 platform, different venders may
>define different SECTION_SIZE_BITS. for example:
>
>  1 arch/arm/mach-clps711x/include/mach/memory.h
>    #define SECTION_SIZE_BITS 24
>  2 arch/arm/mach-exynos/include/mach/memory.h
>    #define SECTION_SIZE_BITS 28
>  3 arch/arm/mach-sa1100/include/mach/memory.h
>    #define SECTION_SIZE_BITS 27
>
>And if Large Physical Address extension is enabled,
>MAX_PHYSMEM_BITS may also be changed.
>
>"So makedumpfile can't get an appropriate values of the two
>macros since the values are variable even if the architecture
>and the kernel version are fixed (at least for arm)" --
>Atsushi Kumagai
>
>This patch makes makedumpfile get these two values from
>vmcore info, which makes the makedumpfile more compatible.
>
>Signed-off-by: Liu Hua <sdu.liu at huawei.com>

Good, I'll merge this into v1.5.7. Thanks for your work.

Atsushi Kumagai

>---
> makedumpfile.c | 17 +++++++++++++++++
> makedumpfile.h |  2 ++
> 2 files changed, 19 insertions(+)
>
>diff --git a/makedumpfile.c b/makedumpfile.c
>index 8dc1181..edfe30b 100644
>--- a/makedumpfile.c
>+++ b/makedumpfile.c
>@@ -2111,6 +2111,8 @@ read_vmcoreinfo(void)
> 	READ_NUMBER("PG_slab", PG_slab);
> 	READ_NUMBER("PG_buddy", PG_buddy);
> 	READ_NUMBER("PG_hwpoison", PG_hwpoison);
>+	READ_NUMBER("SECTION_SIZE_BITS", SECTION_SIZE_BITS);
>+	READ_NUMBER("MAX_PHYSMEM_BITS", MAX_PHYSMEM_BITS);
>
> 	READ_SRCFILE("pud_t", pud_t);
>
>@@ -2996,6 +2998,18 @@ initialize_bitmap_memory(void)
> }
>
> int
>+calibrate_machdep_info(void)
>+{
>+	if (NUMBER(MAX_PHYSMEM_BITS) > 0)
>+		info->max_physmem_bits = NUMBER(MAX_PHYSMEM_BITS);
>+
>+	if (NUMBER(SECTION_SIZE_BITS) > 0)
>+		info->section_size_bits = NUMBER(SECTION_SIZE_BITS);
>+
>+	return TRUE;
>+}
>+
>+int
> initial(void)
> {
> 	off_t offset;
>@@ -3212,6 +3226,9 @@ out:
> 	if (debug_info && !get_machdep_info())
> 		return FALSE;
>
>+	if (debug_info && !calibrate_machdep_info())
>+		return FALSE;
>+
> 	if (is_xen_memory() && !get_dom0_mapnr())
> 		return FALSE;
>
>diff --git a/makedumpfile.h b/makedumpfile.h
>index eb03688..7acb23a 100644
>--- a/makedumpfile.h
>+++ b/makedumpfile.h
>@@ -1434,6 +1434,8 @@ struct number_table {
> 	long    PG_hwpoison;
>
> 	long	PAGE_BUDDY_MAPCOUNT_VALUE;
>+	long	SECTION_SIZE_BITS;
>+	long	MAX_PHYSMEM_BITS;
> };
>
> struct srcfile_table {
>--
>1.9.0