1 files changed, 12 insertions, 1 deletions

diff --git a/kernel/crash_dump.c b/kernel/crash_dump.c
index 5f85690285d4..c766ee54c0b1 100644
--- a/kernel/crash_dump.c
+++ b/kernel/crash_dump.c
@@ -2,7 +2,7 @@
 #include <linux/crash_dump.h>
 #include <linux/init.h>
 #include <linux/errno.h>
-#include <linux/module.h>
+#include <linux/export.h>
 
 /*
  * If we have booted due to a crash, max_pfn will be a very low value. We need
@@ -20,8 +20,15 @@ unsigned long saved_max_pfn;
 unsigned long long elfcorehdr_addr = ELFCORE_ADDR_MAX;
 
 /*
+ * stores the size of elf header of crash image
+ */
+unsigned long long elfcorehdr_size;
+
+/*
  * elfcorehdr= specifies the location of elf core header stored by the crashed
  * kernel. This option will be passed by kexec loader to the capture kernel.
+ *
+ * Syntax: elfcorehdr=[size[KMG]@]offset[KMG]
  */
 static int __init setup_elfcorehdr(char *arg)
 {
@@ -29,6 +36,10 @@ static int __init setup_elfcorehdr(char *arg)
         if (!arg)
                 return -EINVAL;
         elfcorehdr_addr = memparse(arg, &end);
+        if (*end == '@') {
+                elfcorehdr_size = elfcorehdr_addr;
+                elfcorehdr_addr = memparse(end + 1, &end);
+        }
         return end > arg ? 0 : -EINVAL;
 }
 early_param("elfcorehdr", setup_elfcorehdr);