x86: unify mmu_context.h

Some amount of asm-x86/mmu_context.h can be unified, including
activate_mm paravirt hook.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: xen-devel <xen-devel@lists.xensource.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 32 insertions, 0 deletions

diff --git a/include/asm-x86/mmu_context.h b/include/asm-x86/mmu_context.h
index 6598450da6c6..fac57014e7c6 100644
--- a/include/asm-x86/mmu_context.h
+++ b/include/asm-x86/mmu_context.h
@@ -1,5 +1,37 @@
+#ifndef __ASM_X86_MMU_CONTEXT_H
+#define __ASM_X86_MMU_CONTEXT_H
+
+#include <asm/desc.h>
+#include <asm/atomic.h>
+#include <asm/pgalloc.h>
+#include <asm/tlbflush.h>
+#include <asm/paravirt.h>
+#ifndef CONFIG_PARAVIRT
+#include <asm-generic/mm_hooks.h>
+
+static inline void paravirt_activate_mm(struct mm_struct *prev,
+                                        struct mm_struct *next)
+{
+}
+#endif  /* !CONFIG_PARAVIRT */
+
+/*
+ * Used for LDT copy/destruction.
+ */
+int init_new_context(struct task_struct *tsk, struct mm_struct *mm);
+void destroy_context(struct mm_struct *mm);
+
 #ifdef CONFIG_X86_32
 # include "mmu_context_32.h"
 #else
 # include "mmu_context_64.h"
 #endif
+
+#define activate_mm(prev, next)                 \
+do {                                            \
+        paravirt_activate_mm((prev), (next));   \
+        switch_mm((prev), (next), NULL);        \
+} while (0);
+
+
+#endif /* __ASM_X86_MMU_CONTEXT_H */