git: fdab8b794ac3 - stable/13 - linsysfs(4): Keep Linux compatible sysfs the same as Ubuntu

The branch stable/13 has been updated by dchagin:

URL: https://cgit.FreeBSD.org/src/commit/?id=fdab8b794ac3e84dacf0fea586b330197baf6f76

commit fdab8b794ac3e84dacf0fea586b330197baf6f76
Author:     Vico Chen <vico.chern_qq.com>
AuthorDate: 2023-03-25 10:41:04 +0000
Commit:     Dmitry Chagin <dchagin@FreeBSD.org>
CommitDate: 2023-06-29 08:15:13 +0000

    linsysfs(4): Keep Linux compatible sysfs the same as Ubuntu
    
    By checking Ubuntu, there is no `/sys/subsystem' in sysfs. To compatible
    with Ubuntu, delete the 'subsystem' creation in Linux compatible module.
    
    On the other hand, the sysfs `/sys/subsystem' cause failure for some
    Linux udev cases. In Linux udev source code, there is a function named
    `scan_devices_all', and it will scan `/sys/subsystem' if it is existed,
    but now there are nothing in /sys/subsystem `, and it returns empty
    to cause some use cases failed.
    
    Reviewed by:            dchagin
    Differential Revision:  https://reviews.freebsd.org/D38885
    MFC after:              1 month
    XMFC with:              ifAPI
    
    (cherry picked from commit 1f0c8bfd650422a30aa6fcf01da860b8d43628a8)
---
 sys/compat/linsysfs/linsysfs.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/sys/compat/linsysfs/linsysfs.c b/sys/compat/linsysfs/linsysfs.c
index 9ec066ac34c4..afb4e6466006 100644
--- a/sys/compat/linsysfs/linsysfs.c
+++ b/sys/compat/linsysfs/linsysfs.c
@@ -680,9 +680,6 @@ linsysfs_init(PFS_INIT_ARGS)
 	/* /sys/kernel/debug, mountpoint for lindebugfs. */
 	pfs_create_dir(kernel, "debug", NULL, NULL, NULL, 0);
 
-	/* /sys/subsystem/... */
-	dir = pfs_create_dir(root, "subsystem", NULL, NULL, NULL, 0);
-
 	return (0);
 }