Merge tag 'doc-2021-04-rc1-2' of https://gitlab.denx.de/u-boot/custodians/u-boot-efi

Pull request for documentation tag doc-2021-04-rc1 (2)

* Man-pages for sbi, exit, for, echo, loady, true, false, conitrace
* Adjust suppression of newline in echo command.
* Provide unit test for echo command.

1 files changed, 12 insertions, 4 deletions

diff --git a/include/asm-generic/global_data.h b/include/asm-generic/global_data.h
index 19f70393b45..b6f707e97e5 100644
--- a/include/asm-generic/global_data.h
+++ b/include/asm-generic/global_data.h
@@ -198,13 +198,21 @@ struct global_data {
 	 */
 	struct udevice *dm_root_f;
 	/**
-	 * @uclass_root: head of core tree
+	 * @uclass_root_s:
+	 * head of core tree when uclasses are not in read-only memory.
+	 *
+	 * When uclasses are in read-only memory, @uclass_root_s is not used and
+	 * @uclass_root points to the root node generated by dtoc.
 	 */
 	struct list_head uclass_root_s;
 	/**
-	 * @uclass_root: pointer to head of core tree, if uclasses are in
-	 * read-only memory and cannot be adjusted to use @uclass_root as a
-	 * list head.
+	 * @uclass_root:
+	 * pointer to head of core tree, if uclasses are in read-only memory and
+	 * cannot be adjusted to use @uclass_root as a list head.
+	 *
+	 * When not in read-only memory, @uclass_root_s is used to hold the
+	 * uclass root, and @uclass_root points to the address of
+	 * @uclass_root_s.
 	 */
 	struct list_head *uclass_root;
 # if CONFIG_IS_ENABLED(OF_PLATDATA)