LWN: Comments on "An updated guide to debugfs"

An updated guide to debugfs - about debugfs_create_x64()

geert — Mon, 10 Aug 2020 13:36:13 +0000

V4.14 was released about 8 years after the article was written.
debugfs_create_x64() was added one year after the article was written.

An updated guide to debugfs - about debugfs_create_x64()

eric.saint.etienne — Sat, 08 Aug 2020 16:38:23 +0000

It's worth to note that debugfs_create_x64() does exist since at least kernel 4.14

An updated guide to debugfs

vomlehn — Fri, 29 May 2009 04:35:49 +0000

It might be worth noting that the return value from debugfs_create_dir indicates success only if it not NULL and IS_ERR() returns zero. If IS_ERR() returns a non-zero value, PTR_ERR() should be used to get the return code.