1 files changed, 26 insertions, 17 deletions

diff --git a/arch/x86/include/asm/kaiser.h b/arch/x86/include/asm/kaiser.h
index 63ee8309b35b..0703f48777f3 100644
--- a/arch/x86/include/asm/kaiser.h
+++ b/arch/x86/include/asm/kaiser.h
@@ -16,13 +16,17 @@
 
 .macro _SWITCH_TO_KERNEL_CR3 reg
 movq %cr3, \reg
+#ifdef CONFIG_KAISER_REAL_SWITCH
 andq $(~0x1000), \reg
+#endif
 movq \reg, %cr3
 .endm
 
 .macro _SWITCH_TO_USER_CR3 reg
 movq %cr3, \reg
+#ifdef CONFIG_KAISER_REAL_SWITCH
 orq $(0x1000), \reg
+#endif
 movq \reg, %cr3
 .endm
 
@@ -65,48 +69,53 @@ movq PER_CPU_VAR(unsafe_stack_register_backup), %rax
 .endm
 
 #endif /* CONFIG_KAISER */
+
 #else /* __ASSEMBLY__ */
 
 
 #ifdef CONFIG_KAISER
-// Upon kernel/user mode switch, it may happen that
-// the address space has to be switched before the registers have been stored.
-// To change the address space, another register is needed.
-// A register therefore has to be stored/restored.
-//
-DECLARE_PER_CPU_USER_MAPPED(unsigned long, unsafe_stack_register_backup);
+/*
+ * Upon kernel/user mode switch, it may happen that the address
+ * space has to be switched before the registers have been
+ * stored.  To change the address space, another register is
+ * needed.  A register therefore has to be stored/restored.
+*/
 
-#endif /* CONFIG_KAISER */
+DECLARE_PER_CPU_USER_MAPPED(unsigned long, unsafe_stack_register_backup);
 
 /**
- *  shadowmem_add_mapping - map a virtual memory part to the shadow mapping
+ *  kaiser_add_mapping - map a virtual memory part to the shadow (user) mapping
  *  @addr: the start address of the range
  *  @size: the size of the range
  *  @flags: The mapping flags of the pages
  *
- *  the mapping is done on a global scope, so no bigger synchronization has to be done.
- *  the pages have to be manually unmapped again when they are not needed any longer.
+ *  The mapping is done on a global scope, so no bigger
+ *  synchronization has to be done.  the pages have to be
+ *  manually unmapped again when they are not needed any longer.
  */
-extern void kaiser_add_mapping(unsigned long addr, unsigned long size, unsigned long flags);
+extern int kaiser_add_mapping(unsigned long addr, unsigned long size, unsigned long flags);
 
 
 /**
- *  shadowmem_remove_mapping - unmap a virtual memory part of the shadow mapping
+ *  kaiser_remove_mapping - unmap a virtual memory part of the shadow mapping
  *  @addr: the start address of the range
  *  @size: the size of the range
  */
 extern void kaiser_remove_mapping(unsigned long start, unsigned long size);
 
 /**
- *  shadowmem_initialize_mapping - Initalize the shadow mapping
+ *  kaiser_initialize_mapping - Initalize the shadow mapping
  *
- *  most parts of the shadow mapping can be mapped upon boot time.
- *  only the thread stacks have to be mapped on runtime.
- *  the mapped regions are not unmapped at all.
+ *  Most parts of the shadow mapping can be mapped upon boot
+ *  time.  Only per-process things like the thread stacks
+ *  or a new LDT have to be mapped at runtime.  These boot-
+ *  time mappings are permanent and nevertunmapped.
  */
 extern void kaiser_init(void);
 
-#endif
+#endif /* CONFIG_KAISER */
+
+#endif /* __ASSEMBLY */