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[Xen-devel] [patch 04/33] xen: paravirt: unstatic leave_mm

To: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Andi Kleen <ak@xxxxxxx>
Subject: [Xen-devel] [patch 04/33] xen: paravirt: unstatic leave_mm
From: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Date: Tue, 22 May 2007 15:09:45 +0100
Cc: Chris Wright <chrisw@xxxxxxxxxxxx>, virtualization@xxxxxxxxxxxxxx, Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>, lkml <linux-kernel@xxxxxxxxxxxxxxx>
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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@xxxxxxxxxxxxx>

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

--- a/include/asm-i386/mmu_context.h
+++ b/include/asm-i386/mmu_context.h
@@ -31,6 +31,8 @@ static inline void enter_lazy_tlb(struct
                per_cpu(cpu_tlbstate, cpu).state = TLBSTATE_LAZY;
+void leave_mm (unsigned long cpu);
 static inline void switch_mm(struct mm_struct *prev,
                             struct mm_struct *next,
--- a/arch/i386/kernel/smp.c
+++ b/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 DEFINE_SPINLOCK(tlbstate_lock);
 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)


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