The man page says:

There is no definition of struct old_linux_dirent; see NOTES.

Since the commit 4131356cd ("man*/, man-pages.7: VERSIONS, STANDARDS,
HISTORY: Reorganize sections"), this information is in VERSIONS.

Fixes: 4131356cd ("man*/, man-pages.7: VERSIONS, STANDARDS, HISTORY: Reorganize sections")
Signed-off-by: Kir Kolyshkin <redacted>
---
 man/man2/readdir.2 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/man/man2/readdir.2 b/man/man2/readdir.2
index 1fb02f7d5..e4b58a652 100644
--- a/man/man2/readdir.2
+++ b/man/man2/readdir.2

@@ -25,7 +25,7 @@ .SH SYNOPSIS
 .IR Note :
 There is no definition of
 .BR "struct old_linux_dirent" ;
-see NOTES.
+see VERSIONS.
 .SH DESCRIPTION
 This is not the function you are interested in.
 Look at

-- 
2.45.2