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-rw-r--r--arch/x86/include/asm/kexec.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/include/asm/kexec.h b/arch/x86/include/asm/kexec.h
index f327236f0fa7..5125fca472bb 100644
--- a/arch/x86/include/asm/kexec.h
+++ b/arch/x86/include/asm/kexec.h
@@ -67,7 +67,7 @@ struct kimage;
/* Memory to backup during crash kdump */
#define KEXEC_BACKUP_SRC_START (0UL)
-#define KEXEC_BACKUP_SRC_END (640 * 1024UL) /* 640K */
+#define KEXEC_BACKUP_SRC_END (640 * 1024UL - 1) /* 640K */
/*
* CPU does not save ss and sp on stack if execution is already