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Subject[PATCH] mm: make free_bootmem to loop bdata_list
[PATCH] mm: make free_bootmem to loop bdata_list

[PATCH] mm: fix boundary checking in free_bootmem_core

make the free_bootmem_core could handle out of range case. we could use
bdata_list to make sure the range can be freed for sure.

so next time, we don't need to loop online nodes and could use
free_bootmem directly.

Signed-off-by: Yinghai Lu <>
Index: linux-2.6/mm/bootmem.c
--- linux-2.6.orig/mm/bootmem.c
+++ linux-2.6/mm/bootmem.c
@@ -427,7 +438,9 @@ int __init reserve_bootmem(unsigned long

void __init free_bootmem(unsigned long addr, unsigned long size)
- free_bootmem_core(NODE_DATA(0)->bdata, addr, size);
+ bootmem_data_t *bdata;
+ list_for_each_entry(bdata, &bdata_list, list)
+ free_bootmem_core(bdata, addr, size);

unsigned long __init free_all_bootmem(void)
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