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Diffstat (limited to 'lib/idr.c')
-rw-r--r--lib/idr.c15
1 files changed, 14 insertions, 1 deletions
diff --git a/lib/idr.c b/lib/idr.c
index 6415d053e2b..6414b2fb482 100644
--- a/lib/idr.c
+++ b/lib/idr.c
@@ -72,7 +72,7 @@ static void free_layer(struct idr *idp, struct idr_layer *p)
* If the system is REALLY out of memory this function returns 0,
* otherwise 1.
*/
-int idr_pre_get(struct idr *idp, unsigned gfp_mask)
+int idr_pre_get(struct idr *idp, gfp_t gfp_mask)
{
while (idp->id_free_cnt < IDR_FREE_MAX) {
struct idr_layer *new;
@@ -346,6 +346,19 @@ void idr_remove(struct idr *idp, int id)
EXPORT_SYMBOL(idr_remove);
/**
+ * idr_destroy - release all cached layers within an idr tree
+ * idp: idr handle
+ */
+void idr_destroy(struct idr *idp)
+{
+ while (idp->id_free_cnt) {
+ struct idr_layer *p = alloc_layer(idp);
+ kmem_cache_free(idr_layer_cache, p);
+ }
+}
+EXPORT_SYMBOL(idr_destroy);
+
+/**
* idr_find - return pointer for given id
* @idp: idr handle
* @id: lookup key