add poweroff command

hc

2023-12-14 982b8cc116118b3463d3f332581945625722acd8

 kernel/fs/ubifs/file.c
..
..
@@ -1031,7 +1031,7 @@
1031
1031
 		if (page->index >= synced_i_size >> PAGE_SHIFT) {
1032
1032
 			err = inode->i_sb->s_op->write_inode(inode, NULL);
1033
1033
 			if (err)
1034
-				goto out_unlock;
1034
+				goto out_redirty;
1035
1035
 			/*
1036
1036
 			 * The inode has been written, but the write-buffer has
1037
1037
 			 * not been synchronized, so in case of an unclean
..
..
@@ -1059,11 +1059,17 @@
1059
1059
 	if (i_size > synced_i_size) {
1060
1060
 		err = inode->i_sb->s_op->write_inode(inode, NULL);
1061
1061
 		if (err)
1062
-			goto out_unlock;
1062
+			goto out_redirty;
1063
1063
 	}
1064
1064
 
1065
1065
 	return do_writepage(page, len);
1066
-
1066
+out_redirty:
1067
+	/*
1068
+	 * redirty_page_for_writepage() won't call ubifs_dirty_inode() because
1069
+	 * it passes I_DIRTY_PAGES flag while calling __mark_inode_dirty(), so
1070
+	 * there is no need to do space budget for dirty inode.
1071
+	 */
1072
+	redirty_page_for_writepage(wbc, page);
1067
1073
 out_unlock:
1068
1074
 	unlock_page(page);
1069
1075
 	return err;