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authorAlex Nixon <alex.nixon@citrix.com>2009-02-09 12:05:46 -0800
committerKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>2010-06-07 14:34:07 -0400
commit19001c8c5bfa032ed45b10dfe48e355f5df88c61 (patch)
tree07ca3058406ef30539a4b462b0891b8f8b797ab7 /include
parent7347b4082e55ac4a673f06a0a0ce25c37273c9ec (diff)
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xen: Rename the balloon lock
* xen_create_contiguous_region needs access to the balloon lock to ensure memory doesn't change under its feet, so expose the balloon lock * Change the name of the lock to xen_reservation_lock, to imply it's now less-specific usage. [ Impact: cleanup ] Signed-off-by: Alex Nixon <alex.nixon@citrix.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'include')
-rw-r--r--include/xen/interface/memory.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/xen/interface/memory.h b/include/xen/interface/memory.h
index af36ead1681..e6adce6bc75 100644
--- a/include/xen/interface/memory.h
+++ b/include/xen/interface/memory.h
@@ -9,6 +9,8 @@
#ifndef __XEN_PUBLIC_MEMORY_H__
#define __XEN_PUBLIC_MEMORY_H__
+#include <linux/spinlock.h>
+
/*
* Increase or decrease the specified domain's memory reservation. Returns a
* -ve errcode on failure, or the # extents successfully allocated or freed.
@@ -142,4 +144,10 @@ struct xen_translate_gpfn_list {
};
DEFINE_GUEST_HANDLE_STRUCT(xen_translate_gpfn_list);
+
+/*
+ * Prevent the balloon driver from changing the memory reservation
+ * during a driver critical region.
+ */
+extern spinlock_t xen_reservation_lock;
#endif /* __XEN_PUBLIC_MEMORY_H__ */