x86, um: ... and asm-x86 move

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

1 files changed, 26 insertions, 0 deletions

diff --git a/arch/x86/include/asm/mmu.h b/arch/x86/include/asm/mmu.h
new file mode 100644
index 00000000000..9d5aff14334
--- /dev/null
+++ b/arch/x86/include/asm/mmu.h
@@ -0,0 +1,26 @@
+#ifndef ASM_X86__MMU_H
+#define ASM_X86__MMU_H
+
+#include <linux/spinlock.h>
+#include <linux/mutex.h>
+
+/*
+ * The x86 doesn't have a mmu context, but
+ * we put the segment information here.
+ */
+typedef struct {
+	void *ldt;
+	int size;
+	struct mutex lock;
+	void *vdso;
+} mm_context_t;
+
+#ifdef CONFIG_SMP
+void leave_mm(int cpu);
+#else
+static inline void leave_mm(int cpu)
+{
+}
+#endif
+
+#endif /* ASM_X86__MMU_H */