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authorOlaf Hering <olaf@aepfle.de>2011-03-23 16:43:29 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-03-23 19:47:19 -0700
commit93a72052be81823fa1584b9be037d51924f9efa4 (patch)
tree4f5c824c8fe3fb737e27b91bfd60c10d092dc3e9 /mm/bootmem.c
parent8547727756a7322b99aa313ce50fe15d8f858872 (diff)
downloadlinux-93a72052be81823fa1584b9be037d51924f9efa4.tar.gz
crash_dump: export is_kdump_kernel to modules, consolidate elfcorehdr_addr, setup_elfcorehdr and saved_max_pfn
The Xen PV drivers in a crashed HVM guest can not connect to the dom0 backend drivers because both frontend and backend drivers are still in connected state. To run the connection reset function only in case of a crashdump, the is_kdump_kernel() function needs to be available for the PV driver modules. Consolidate elfcorehdr_addr, setup_elfcorehdr and saved_max_pfn into kernel/crash_dump.c Also export elfcorehdr_addr to make is_kdump_kernel() usable for modules. Leave 'elfcorehdr' as early_param(). This changes powerpc from __setup() to early_param(). It adds an address range check from x86 also on ia64 and powerpc. [akpm@linux-foundation.org: additional #includes] [akpm@linux-foundation.org: remove elfcorehdr_addr export] [akpm@linux-foundation.org: fix for Tejun's mm/nobootmem.c changes] Signed-off-by: Olaf Hering <olaf@aepfle.de> Cc: Russell King <rmk@arm.linux.org.uk> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/bootmem.c')
-rw-r--r--mm/bootmem.c8
1 files changed, 0 insertions, 8 deletions
diff --git a/mm/bootmem.c b/mm/bootmem.c
index 07aeb89e396..01d5a4b3dd0 100644
--- a/mm/bootmem.c
+++ b/mm/bootmem.c
@@ -34,14 +34,6 @@ unsigned long max_low_pfn;
unsigned long min_low_pfn;
unsigned long max_pfn;
-#ifdef CONFIG_CRASH_DUMP
-/*
- * If we have booted due to a crash, max_pfn will be a very low value. We need
- * to know the amount of memory that the previous kernel used.
- */
-unsigned long saved_max_pfn;
-#endif
-
bootmem_data_t bootmem_node_data[MAX_NUMNODES] __initdata;
static struct list_head bdata_list __initdata = LIST_HEAD_INIT(bdata_list);