From 6af61a7614a306fe882a0c2b4ddc63b65aa66efc Mon Sep 17 00:00:00 2001
From: Yinghai Lu <yhlu.kernel@gmail.com>
Date: Sun, 1 Jun 2008 23:53:50 -0700
Subject: x86: clean up max_pfn_mapped usage - 32-bit

on 32-bit in head_32.S after initial page table is done, we get initial
max_pfn_mapped, and then kernel_physical_mapping_init will give us
a final one.

We need to use that to make sure find_e820_area will get valid addresses
for boot_map and for NODE_DATA(0) on numa32.

XEN PV and lguest may need to assign max_pfn_mapped too.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
 arch/x86/kernel/setup_32.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'arch/x86/kernel/setup_32.c')

diff --git a/arch/x86/kernel/setup_32.c b/arch/x86/kernel/setup_32.c
index 29010420458d..c985a8c305e0 100644
--- a/arch/x86/kernel/setup_32.c
+++ b/arch/x86/kernel/setup_32.c
@@ -586,7 +586,7 @@ void __init setup_bootmem_allocator(void)
 	 */
 	bootmap_size = bootmem_bootmap_pages(max_low_pfn)<<PAGE_SHIFT;
 	bootmap = find_e820_area(min_low_pfn<<PAGE_SHIFT,
-				 max_low_pfn<<PAGE_SHIFT, bootmap_size,
+				 max_pfn_mapped<<PAGE_SHIFT, bootmap_size,
 				 PAGE_SIZE);
 	if (bootmap == -1L)
 		panic("Cannot find bootmem map of size %ld\n", bootmap_size);
@@ -595,6 +595,8 @@ void __init setup_bootmem_allocator(void)
 	reserve_initrd();
 #endif
 	bootmap_size = init_bootmem(bootmap >> PAGE_SHIFT, max_low_pfn);
+	printk(KERN_INFO "  mapped low ram: 0 - %08lx\n",
+		 max_pfn_mapped<<PAGE_SHIFT);
 	printk(KERN_INFO "  low ram: %08lx - %08lx\n",
 		 min_low_pfn<<PAGE_SHIFT, max_low_pfn<<PAGE_SHIFT);
 	printk(KERN_INFO "  bootmap %08lx - %08lx\n",
-- 
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