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authorDan Williams <dan.j.williams@intel.com>2022-09-24 18:14:12 -0700
committerDan Williams <dan.j.williams@intel.com>2022-09-24 18:14:12 -0700
commitb3bbcc5d1da1b654091dad15980b3d58fdae0fc6 (patch)
tree77795fbece4fc61a659ed97c70d798ca81f35bb8 /tools/include/linux/list.h
parent17d9c15c9b9e7fb285f7ac5367dfb5f00ff575e3 (diff)
parent67feaba413ec68daf4124e9870878899b4ed9a0e (diff)
Merge branch 'for-6.0/dax' into libnvdimm-fixes
Pick up another "Soft Reservation" fix for v6.0-final on top of some straggling nvdimm fixes that missed v5.19.
Diffstat (limited to 'tools/include/linux/list.h')
-rw-r--r--tools/include/linux/list.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/tools/include/linux/list.h b/tools/include/linux/list.h
index b2fc48d5478c..a4dfb6a7cc6a 100644
--- a/tools/include/linux/list.h
+++ b/tools/include/linux/list.h
@@ -385,6 +385,17 @@ static inline void list_splice_tail_init(struct list_head *list,
(!list_empty(ptr) ? list_first_entry(ptr, type, member) : NULL)
/**
+ * list_last_entry_or_null - get the last element from a list
+ * @ptr: the list head to take the element from.
+ * @type: the type of the struct this is embedded in.
+ * @member: the name of the list_head within the struct.
+ *
+ * Note that if the list is empty, it returns NULL.
+ */
+#define list_last_entry_or_null(ptr, type, member) \
+ (!list_empty(ptr) ? list_last_entry(ptr, type, member) : NULL)
+
+/**
* list_next_entry - get the next element in list
* @pos: the type * to cursor
* @member: the name of the list_head within the struct.