X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=blobdiff_plain;f=lib%2Fradix-tree.c;h=bc03ecc4dfd2f69c8638cbff3270bc55793b7f6b;hb=d82924c3b8d0607094b94fab290a33c5ad7d586c;hp=a9e41aed6de4bfb063af9d16d41942a041a23fdd;hpb=b4394c34356180adb783a5cba2aee469e76a52ff;p=linux.git

diff --git a/lib/radix-tree.c b/lib/radix-tree.c
index a9e41aed6de4..bc03ecc4dfd2 100644
--- a/lib/radix-tree.c
+++ b/lib/radix-tree.c
@@ -120,7 +120,7 @@ bool is_sibling_entry(const struct radix_tree_node *parent, void *node)
 static inline unsigned long
 get_slot_offset(const struct radix_tree_node *parent, void __rcu **slot)
 {
-	return slot - parent->slots;
+	return parent ? slot - parent->slots : 0;
 }
 
 static unsigned int radix_tree_descend(const struct radix_tree_node *parent,
@@ -2106,14 +2106,6 @@ void idr_preload(gfp_t gfp_mask)
 }
 EXPORT_SYMBOL(idr_preload);
 
-/**
- * ida_pre_get - reserve resources for ida allocation
- * @ida: ida handle
- * @gfp: memory allocation flags
- *
- * This function should be called before calling ida_get_new_above().  If it
- * is unable to allocate memory, it will return %0.  On success, it returns %1.
- */
 int ida_pre_get(struct ida *ida, gfp_t gfp)
 {
 	/*
@@ -2134,7 +2126,6 @@ int ida_pre_get(struct ida *ida, gfp_t gfp)
 
 	return 1;
 }
-EXPORT_SYMBOL(ida_pre_get);
 
 void __rcu **idr_get_free(struct radix_tree_root *root,
 			      struct radix_tree_iter *iter, gfp_t gfp,