i386: unstatic leave_mm

From: Jeremy Fitzhardinge <jeremy@goop.org>
Make globally leave_mm visible, specifically so that Xen can use it to
shoot-down lazy uses of cr3.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Andi Kleen <ak@suse.de>

---
 arch/i386/kernel/smp.c         |    5 +++--
 include/asm-i386/mmu_context.h |    2 ++
 2 files changed, 5 insertions(+), 2 deletions(-)

===================================================================
Index: linux/include/asm-i386/mmu_context.h
===================================================================
--- linux.orig/include/asm-i386/mmu_context.h
+++ linux/include/asm-i386/mmu_context.h
@@ -32,6 +32,8 @@ static inline void enter_lazy_tlb(struct
 #endif
 }
 
+void leave_mm (unsigned long cpu);
+
 static inline void switch_mm(struct mm_struct *prev,
 			     struct mm_struct *next,
 			     struct task_struct *tsk)
Index: linux/arch/i386/kernel/smp.c
===================================================================
--- linux.orig/arch/i386/kernel/smp.c
+++ linux/arch/i386/kernel/smp.c
@@ -22,6 +22,7 @@
 
 #include <asm/mtrr.h>
 #include <asm/tlbflush.h>
+#include <asm/mmu_context.h>
 #include <mach_apic.h>
 
 /*
@@ -249,13 +250,13 @@ static unsigned long flush_va;
 static DEFINE_SPINLOCK(tlbstate_lock);
 
 /*
- * We cannot call mmdrop() because we are in interrupt context, 
+ * We cannot call mmdrop() because we are in interrupt context,
  * instead update mm->cpu_vm_mask.
  *
  * We need to reload %cr3 since the page tables may be going
  * away from under us..
  */
-static inline void leave_mm (unsigned long cpu)
+void leave_mm (unsigned long cpu)
 {
 	if (per_cpu(cpu_tlbstate, cpu).state == TLBSTATE_OK)
 		BUG();