UBUNTU: Ubuntu-4.13.0-45.50

[mirror_ubuntu-artful-kernel.git] / lib / radix-tree.c

diff --git a/lib/radix-tree.c b/lib/radix-tree.c
index 898e8799841759ff20f1dc3eb25f277ebb3a8119..79a804f1aab9df72563adf9cf2b10ad8b7c1947e 100644 (file)
--- a/lib/radix-tree.c
+++ b/lib/radix-tree.c
@@ -463,7 +463,7 @@ radix_tree_node_free(struct radix_tree_node *node)
  * To make use of this facility, the radix tree must be initialised without
  * __GFP_DIRECT_RECLAIM being passed to INIT_RADIX_TREE().
  */
-static int __radix_tree_preload(gfp_t gfp_mask, unsigned nr)
+static __must_check int __radix_tree_preload(gfp_t gfp_mask, unsigned nr)
 {
        struct radix_tree_preload *rtp;
        struct radix_tree_node *node;
@@ -2103,7 +2103,8 @@ EXPORT_SYMBOL(radix_tree_tagged);
  */
 void idr_preload(gfp_t gfp_mask)
 {
-       __radix_tree_preload(gfp_mask, IDR_PRELOAD_SIZE);
+       if (__radix_tree_preload(gfp_mask, IDR_PRELOAD_SIZE))
+               preempt_disable();
 }
 EXPORT_SYMBOL(idr_preload);
 
@@ -2117,13 +2118,13 @@ EXPORT_SYMBOL(idr_preload);
  */
 int ida_pre_get(struct ida *ida, gfp_t gfp)
 {
-       __radix_tree_preload(gfp, IDA_PRELOAD_SIZE);
        /*
         * The IDA API has no preload_end() equivalent.  Instead,
         * ida_get_new() can return -EAGAIN, prompting the caller
         * to return to the ida_pre_get() step.
         */
-       preempt_enable();
+       if (!__radix_tree_preload(gfp, IDA_PRELOAD_SIZE))
+               preempt_enable();
 
        if (!this_cpu_read(ida_bitmap)) {
                struct ida_bitmap *bitmap = kmalloc(sizeof(*bitmap), gfp);