Fix compile failure without -O2

Linking fails without lto on

1 files changed, 4 insertions, 2 deletions

diff --git a/src/gdt.h b/src/gdt.h
index 6aeaa33..4deeec3 100644
--- a/src/gdt.h
+++ b/src/gdt.h
@@ -95,11 +95,13 @@ public:
 
     unsigned int base_31_24 : 8 = 0;   // high bits of segment address
   } __attribute__((packed));
-  enum SegmentMap { null0, kcode, kdata };
+  enum SegmentMap { null0 = 0, kcode = 1, kdata = 2 };
 
   GDT();
   ~GDT() = default;
 
-  uint16_t descriptor(SegmentMap) const;
+  static constexpr uint16_t descriptor(GDT::SegmentMap i) {
+    return static_cast<uint16_t>(i * sizeof(SegmentDescriptor));
+  }
 };