diff options
| author |   Vivek Goyal <vgoyal@in.ibm.com> | 2005-06-25 14:58:18 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-06-25 16:24:52 -0700 |
| commit | 92aa63a5a1bf2e7b0c79e6716d24b76dbbdcf951 (patch) | |
| tree | 1f4d49c8e9bf02e834e6af8c1f7d4484d9f76c6e /include/linux/bootmem.h | |
| parent | [PATCH] kdump documentation update to introduce use of irqpoll (diff) | |
| download | linux-dev-92aa63a5a1bf2e7b0c79e6716d24b76dbbdcf951.tar.xz linux-dev-92aa63a5a1bf2e7b0c79e6716d24b76dbbdcf951.zip | |
[PATCH] kdump: Retrieve saved max pfn
This patch retrieves the max_pfn being used by previous kernel and stores it
in a safe location (saved_max_pfn) before it is overwritten due to user
defined memory map. This pfn is used to make sure that user does not try to
read the physical memory beyond saved_max_pfn.
Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/bootmem.h')
| -rw-r--r-- | include/linux/bootmem.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/bootmem.h b/include/linux/bootmem.h index 500f451ce0c0..82bd8842d11c 100644 --- a/include/linux/bootmem.h +++ b/include/linux/bootmem.h @@ -22,6 +22,10 @@ extern unsigned long min_low_pfn; */ extern unsigned long max_pfn; +#ifdef CONFIG_CRASH_DUMP +extern unsigned long saved_max_pfn; +#endif + /* * node_bootmem_map is a map pointer - the bits represent all physical * memory pages (including holes) on the node. |