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-rw-r--r--include/linux/idr.h1
-rw-r--r--lib/idr.c10
2 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/idr.h b/include/linux/idr.h
index 871a213..9c95d21 100644
--- a/include/linux/idr.h
+++ b/include/linux/idr.h
@@ -85,6 +85,7 @@ void idr_remove(struct idr *idp, int id);
void idr_free(struct idr *idp, int id);
void idr_destroy(struct idr *idp);
void idr_init(struct idr *idp);
+bool idr_is_empty(struct idr *idp);
/**
* idr_preload_end - end preload section started with idr_preload()
diff --git a/lib/idr.c b/lib/idr.c
index dd06ccb..78713ff 100644
--- a/lib/idr.c
+++ b/lib/idr.c
@@ -872,6 +872,16 @@ void idr_init(struct idr *idp)
}
EXPORT_SYMBOL(idr_init);
+static int idr_has_entry(int id, void *p, void *data)
+{
+ return 1;
+}
+
+bool idr_is_empty(struct idr *idp)
+{
+ return !idr_for_each(idp, idr_has_entry, NULL);
+}
+EXPORT_SYMBOL(idr_is_empty);
/**
* DOC: IDA description