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-rw-r--r--include/asm-i386/segment.h10
1 files changed, 7 insertions, 3 deletions
diff --git a/include/asm-i386/segment.h b/include/asm-i386/segment.h
index 065f10bfa487..597a47c2515f 100644
--- a/include/asm-i386/segment.h
+++ b/include/asm-i386/segment.h
@@ -39,7 +39,7 @@
* 25 - APM BIOS support
*
* 26 - ESPFIX small SS
- * 27 - PDA [ per-cpu private data area ]
+ * 27 - per-cpu [ offset to per-cpu data area ]
* 28 - unused
* 29 - unused
* 30 - unused
@@ -74,8 +74,12 @@
#define GDT_ENTRY_ESPFIX_SS (GDT_ENTRY_KERNEL_BASE + 14)
#define __ESPFIX_SS (GDT_ENTRY_ESPFIX_SS * 8)
-#define GDT_ENTRY_PDA (GDT_ENTRY_KERNEL_BASE + 15)
-#define __KERNEL_PDA (GDT_ENTRY_PDA * 8)
+#define GDT_ENTRY_PERCPU (GDT_ENTRY_KERNEL_BASE + 15)
+#ifdef CONFIG_SMP
+#define __KERNEL_PERCPU (GDT_ENTRY_PERCPU * 8)
+#else
+#define __KERNEL_PERCPU 0
+#endif
#define GDT_ENTRY_DOUBLEFAULT_TSS 31