[PATCH] Increase number of e820 entries hard limit from 32 to 128

The specifications that talk about E820 map doesn't have an upper limit on
the number of e820 entries.  But, today's kernel has a hard limit of 32.
With increase in memory size, we are seeing the number of E820 entries
reaching close to 32.  Patch below bumps the number upto 128.

The patch changes the location of EDDBUF in zero-page (as it comes after E820).
As, EDDBUF is not used by boot loaders, this patch should not have any effect
on bootloader-setup code interface.

Patch covers both i386 and x86-64.

Tested on:
* grub booting bzImage
* lilo booting bzImage with EDID info enabled
* pxeboot of bzImage

Side-effect:
bss increases by ~ 2K and init.data increases by ~7.5K
on all systems, due to increase in size of static arrays.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 3 insertions, 3 deletions

diff --git a/Documentation/i386/zero-page.txt b/Documentation/i386/zero-page.txt
index 67c053a099ed..df28c7416781 100644
--- a/Documentation/i386/zero-page.txt
+++ b/Documentation/i386/zero-page.txt
@@ -79,6 +79,6 @@ Offset	Type		Description
 0x22c   unsigned long   ramdisk_max
 0x230   16 bytes        trampoline
 0x290 - 0x2cf           EDD_MBR_SIG_BUFFER (edd.S)
-0x2d0 - 0x600           E820MAP
-0x600 - 0x7ff           EDDBUF (edd.S) for disk signature read sector
-0x600 - 0x7eb           EDDBUF (edd.S) for edd data
+0x2d0 - 0xd00           E820MAP
+0xd00 - 0xeff           EDDBUF (edd.S) for disk signature read sector
+0xd00 - 0xeeb           EDDBUF (edd.S) for edd data