Commit 5992b6da authored by Rusty Russell's avatar Rusty Russell Committed by Linus Torvalds
Browse files

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: default avatarRusty Russell <rusty@rustcorp.com.au>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 57deb526

arch/i386/kernel/traps.c

+1 −0
Original line number Diff line number Diff line
@@ -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

kernel/fork.c

+1 −0
Original line number Diff line number Diff line
@@ -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)

{

mm/memory.c

+1 −0
Original line number Diff line number Diff line
@@ -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);

mm/vmalloc.c

+2 −0
Original line number Diff line number Diff line
@@ -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

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