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-rw-r--r--include/asm-x86/e820.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/asm-x86/e820.h b/include/asm-x86/e820.h
index f52daf176bc..ca433c36af7 100644
--- a/include/asm-x86/e820.h
+++ b/include/asm-x86/e820.h
@@ -43,6 +43,7 @@
#define E820_RESERVED 2
#define E820_ACPI 3
#define E820_NVS 4
+#define E820_UNUSABLE 5
/* reserved RAM used by kernel itself */
#define E820_RESERVED_KERN 128