lguest: export symbols for lguest as a module

lguest does some fairly lowlevel things to support a host, which
normal modules don't need:

math_state_restore:
	When the guest triggers a Device Not Available fault, we need
	to be able to restore the FPU

__put_task_struct:
	We need to hold a reference to another task for inter-guest
	I/O, and put_task_struct() is an inline function which calls
	__put_task_struct.

access_process_vm:
	We need to access another task for inter-guest I/O.

map_vm_area & __get_vm_area:
	We need to map the switcher shim (ie. monitor) at 0xFFC01000.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

4 files changed, 5 insertions, 0 deletions

diff --git a/arch/i386/kernel/traps.c b/arch/i386/kernel/traps.c
index d32fd4b6f78e..109ebbcde585 100644
--- a/arch/i386/kernel/traps.c
+++ b/arch/i386/kernel/traps.c
@@ -1056,6 +1056,7 @@ asmlinkage void math_state_restore(void)
         thread->status |= TS_USEDFPU;   /* So we fnsave on switch_to() */
         tsk->fpu_counter++;
 }
+EXPORT_SYMBOL_GPL(math_state_restore);
 
 #ifndef CONFIG_MATH_EMULATION
 
diff --git a/kernel/fork.c b/kernel/fork.c
index 469838998220..e7a2d995b087 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -127,6 +127,7 @@ void __put_task_struct(struct task_struct *tsk)
         if (!profile_handoff_task(tsk))
                 free_task(tsk);
 }
+EXPORT_SYMBOL_GPL(__put_task_struct);
 
 void __init fork_init(unsigned long mempages)
 {
diff --git a/mm/memory.c b/mm/memory.c
index 50dd3d1f4d18..8aace3db3a54 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -2865,3 +2865,4 @@ int access_process_vm(struct task_struct *tsk, unsigned long addr, void *buf, in
 
         return buf - old_buf;
 }
+EXPORT_SYMBOL_GPL(access_process_vm);
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 213d5e5079ff..3cee76a8c9f0 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -164,6 +164,7 @@ int map_vm_area(struct vm_struct *area, pgprot_t prot, struct page ***pages)
         flush_cache_vmap((unsigned long) area->addr, end);
         return err;
 }
+EXPORT_SYMBOL_GPL(map_vm_area);
 
 static struct vm_struct *__get_vm_area_node(unsigned long size, unsigned long flags,
                                             unsigned long start, unsigned long end,
@@ -242,6 +243,7 @@ struct vm_struct *__get_vm_area(unsigned long size, unsigned long flags,
 {
         return __get_vm_area_node(size, flags, start, end, -1, GFP_KERNEL);
 }
+EXPORT_SYMBOL_GPL(__get_vm_area);
 
 /**
  *      get_vm_area  -  reserve a contingous kernel virtual area