[PATCH 1/1] kdump: fix compiling error: undefined elfcorehdr_addr

[Li, Zhen-Hua]

While debugging the kdump kernel, I found there is a compiling error:
If is_kdump_kernel() is called in some driver(for example, add it in
debugging code in module qla2xxx), there will be a compiling error:

ERROR: "elfcorehdr_addr" [drivers/scsi/qla2xxx/qla2xxx.ko] undefined!

Add EXPORT_SYMBOL for elfcorehdr_addr will fix this.

Signed-off-by: Li, Zhen-Hua <zhen-hual@xxxxxx>
---
 kernel/crash_dump.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/crash_dump.c b/kernel/crash_dump.c
index c766ee5..8cb4838 100644
--- a/kernel/crash_dump.c
+++ b/kernel/crash_dump.c
@@ -18,6 +18,7 @@ unsigned long saved_max_pfn;
  * it under CONFIG_CRASH_DUMP and not CONFIG_PROC_VMCORE.
  */
 unsigned long long elfcorehdr_addr = ELFCORE_ADDR_MAX;
+EXPORT_SYMBOL(elfcorehdr_addr);
 
 /*
  * stores the size of elf header of crash image
-- 
2.0.0-rc0

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