alist: Add a function to empty the list

Sometimes it is useful to empty the list without de-allocating any of
the memory used, e.g. when the list will be re-populated immediately
afterwards.

Add a new function for this.

Signed-off-by: Simon Glass <sjg@chromium.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/lib/alist.c b/lib/alist.c
index 1a4b4fb9c40..32cd45b0b01 100644
--- a/lib/alist.c
+++ b/lib/alist.c
@@ -41,6 +41,11 @@ void alist_uninit(struct alist *lst)
 	memset(lst, '\0', sizeof(struct alist));
 }
 
+void alist_empty(struct alist *lst)
+{
+	lst->count = 0;
+}
+
 /**
  * alist_expand_to() - Expand a list to the given size
  *