From: Jack Steiner The latest 2- .6.12-rc5-mm2 will not boot on large SGI systems. "pfn" was assigned to an "int". Large systems overflow an int. Trivial fix & it works ok now..... Signed-off-by: Jack Steiner Signed-off-by: Andrew Morton --- mm/page_alloc.c | 4 ++-- mm/sparse.c | 2 +- 2 files changed, 3 insertions(+), 3 deletions(-) diff -puN mm/page_alloc.c~sparsemem-hotplug-base-fix mm/page_alloc.c --- 25/mm/page_alloc.c~sparsemem-hotplug-base-fix 2005-06-01 13:01:27.000000000 -0700 +++ 25-akpm/mm/page_alloc.c 2005-06-01 13:01:27.000000000 -0700 @@ -1588,8 +1588,8 @@ void __init memmap_init_zone(unsigned lo unsigned long start_pfn) { struct page *page; - int end_pfn = start_pfn + size; - int pfn; + unsigned long end_pfn = start_pfn + size; + unsigned long pfn; for (pfn = start_pfn; pfn < end_pfn; pfn++, page++) { if (!early_pfn_valid(pfn)) diff -puN mm/sparse.c~sparsemem-hotplug-base-fix mm/sparse.c --- 25/mm/sparse.c~sparsemem-hotplug-base-fix 2005-06-01 13:01:27.000000000 -0700 +++ 25-akpm/mm/sparse.c 2005-06-01 13:01:27.000000000 -0700 @@ -124,7 +124,7 @@ void sparse_init(void) * set. If this is <=0, then that means that the passed-in * map was not consumed and must be freed. */ -int sparse_add_one_section(int start_pfn, int nr_pages, struct page *map) +int sparse_add_one_section(unsigned long start_pfn, int nr_pages, struct page *map) { struct mem_section *ms = __pfn_to_section(start_pfn); _