xarray: Add range store functionality

This version of xa_store_range() really only supports load and store.
Our only user only needs basic load and store functionality, so there's
no need to do the extra work to support marking and overlapping stores
correctly yet.

Signed-off-by: Matthew Wilcox <willy@infradead.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/linux/xarray.h b/include/linux/xarray.h
index e0b57af52e9b..d9514928ddac 100644
--- a/include/linux/xarray.h
+++ b/include/linux/xarray.h
@@ -292,6 +292,8 @@ void *xa_store(struct xarray *, unsigned long index, void *entry, gfp_t);
 void *xa_cmpxchg(struct xarray *, unsigned long index,
                         void *old, void *entry, gfp_t);
 int xa_reserve(struct xarray *, unsigned long index, gfp_t);
+void *xa_store_range(struct xarray *, unsigned long first, unsigned long last,
+                        void *entry, gfp_t);
 bool xa_get_mark(struct xarray *, unsigned long index, xa_mark_t);
 void xa_set_mark(struct xarray *, unsigned long index, xa_mark_t);
 void xa_clear_mark(struct xarray *, unsigned long index, xa_mark_t);