[Crash-utility] [PATCH] Fix overflow problem of "kmem -p" on i386 SPARSEMEM

Hi, This patch fixes the overflow problem that "kmem -p" cannot display the physical addresses properly on i386 SPARSEMEM kernel. Before applying this patch: crash> kmem -p PAGE PHYSICAL MAPPING INDEX CNT FLAGS [snip] cb000260 ffffb000 ------- ----- 1 e000400 cb000280 ffffc000 ------- ----- 1 e000400 cb0002a0 ffffd000 ------- ----- 1 e000400 cb0002c0 ffffe000 ------- ----- 1 e000400 cb0002e0 fffff000 ------- ----- 1 e000400 cb000400 0 ------- ----- 0 12080000 cb000420 1000 ------- ----- 0 12000000 cb000440 2000 ------- ----- 0 12000000 cb000460 3000 ------- ----- 0 12000000 cb000480 4000 ------- ----- 0 12000000 After applying this patch: crash> kmem -p PAGE PHYSICAL MAPPING INDEX CNT FLAGS [snip] cb000260 ffffb000 ------- ----- 1 e000400 cb000280 ffffc000 ------- ----- 1 e000400 cb0002a0 ffffd000 ------- ----- 1 e000400 cb0002c0 ffffe000 ------- ----- 1 e000400 cb0002e0 fffff000 ------- ----- 1 e000400 cb000400 100000000 ------- ----- 0 12080000 cb000420 100001000 ------- ----- 0 12000000 cb000440 100002000 ------- ----- 0 12000000 cb000460 100003000 ------- ----- 0 12000000 cb000480 100004000 ------- ----- 0 12000000 This problem can be reproduced on the following environment: The crash utility: crash-4.0-4.8 + [PATCH] display information about "struct page" on SPARSEMEM.(2007/11/02) System: CPU: i386 MEM: 4GB or bigger Kernel: i386, PAE, SPARSEMEM Thanks Ken'ichi Ohmichi Signed-off-by: Ken'ichi Ohmichi <oomichi(a)mxs.nes.nec.co.jp&gt; --- diff -rpuN crash-4.0-4.8.org/memory.c crash-4.0-4.8/memory.c --- crash-4.0-4.8.org/memory.c 2007-10-31 11:49:16.000000000 +0900 +++ crash-4.0-4.8/memory.c 2007-11-13 15:48:31.000000000 +0900 @@ -4004,7 +4004,7 @@ dump_mem_map_SPARSEMEM(struct meminfo *m pp = section_mem_map_addr(section); pp = sparse_decode_mem_map(pp, section_nr); - phys = section_nr * PAGES_PER_SECTION() * PAGESIZE(); + phys = (physaddr_t) section_nr * PAGES_PER_SECTION() * PAGESIZE(); section_size = PAGES_PER_SECTION(); for (i = 0; i < section_size; _