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From: Michael S. Tsirkin on 9 Nov 2009 12:30
vhost net module wants to do copy to/from user from a kernel thread,
which needs use_mm. Export it to modules.

Acked-by: Andrea Arcangeli <aarcange(a)redhat.com>
Acked-by: Andrew Morton <akpm(a)linux-foundation.org>
Signed-off-by: Michael S. Tsirkin <mst(a)redhat.com>
---
mm/mmu_context.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/mm/mmu_context.c b/mm/mmu_context.c
index ded9081..0777654 100644
--- a/mm/mmu_context.c
+++ b/mm/mmu_context.c
@@ -5,6 +5,7 @@

#include <linux/mm.h>
#include <linux/mmu_context.h>
+#include <linux/module.h>
#include <linux/sched.h>

#include <asm/mmu_context.h>
@@ -37,6 +38,7 @@ void use_mm(struct mm_struct *mm)
if (active_mm != mm)
mmdrop(active_mm);
}
+EXPORT_SYMBOL_GPL(use_mm);

/*
* unuse_mm
@@ -56,3 +58,4 @@ void unuse_mm(struct mm_struct *mm)
enter_lazy_tlb(mm, tsk);
task_unlock(tsk);
}
+EXPORT_SYMBOL_GPL(unuse_mm);
--
1.6.5.2.143.g8cc62

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