patch-2.4.21 linux-2.4.21/include/asm-ia64/mmu.h

• Lines: 14
• Date: 2003-06-13 07:51:38.000000000 -0700
• Orig file: linux-2.4.20/include/asm-ia64/mmu.h
• Orig date: 2000-12-29 14:07:23.000000000 -0800

diff -urN linux-2.4.20/include/asm-ia64/mmu.h linux-2.4.21/include/asm-ia64/mmu.h
@@ -1,7 +1,11 @@
 #ifndef __MMU_H
 #define __MMU_H
 
-/* Default "unsigned long" context */
-typedef unsigned long mm_context_t;
+/*
+ * Type for a context number.  We declare it volatile to ensure proper ordering when it's
+ * accessed outside of spinlock'd critical sections (e.g., as done in activate_mm() and
+ * init_new_context()).
+ */
+typedef volatile unsigned long mm_context_t;
 
 #endif