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-rw-r--r--arch/x86/include/asm/microcode.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/include/asm/microcode.h b/arch/x86/include/asm/microcode.h
index 04789353ec..29bf060889 100644
--- a/arch/x86/include/asm/microcode.h
+++ b/arch/x86/include/asm/microcode.h
@@ -9,6 +9,9 @@
#ifndef __ASSEMBLY__
+/* This is a declaration for ucode_base in start.S */
+extern u32 ucode_base;
+
/**
* microcode_update_intel() - Apply microcode updates
*
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