The branch stable/13 has been updated by trasz:

URL: 
https://cgit.FreeBSD.org/src/commit/?id=a10a92d34ca7ae4a78646c9daa49be5a1e7a3859

commit a10a92d34ca7ae4a78646c9daa49be5a1e7a3859
Author:     Edward Tomasz Napierala <[email protected]>
AuthorDate: 2021-03-08 20:55:44 +0000
Commit:     Edward Tomasz Napierala <[email protected]>
CommitDate: 2022-02-13 23:19:21 +0000

    linsysfs: create /sys/bus/ and /sys/subsystem/
    
    This looks like a no-op, but it prevents udevadm(8) with failing
    loudly, which in turn unbreaks installation of libfprint-2-2, which
    in Focal is a dependency for make-4.2.1-1.2.
    
    One might wonder why installing a build utility involves messing
    with device handling...
    
    Sponsored By:   The FreeBSD Foundation
    Differential Revision:  https://reviews.freebsd.org/D29133
    
    (cherry picked from commit dc0119c28194b537cfa2ad95ce2e62589da7ceb0)
---
 sys/compat/linsysfs/linsysfs.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/sys/compat/linsysfs/linsysfs.c b/sys/compat/linsysfs/linsysfs.c
index 66cb36db9868..8d3be1507de9 100644
--- a/sys/compat/linsysfs/linsysfs.c
+++ b/sys/compat/linsysfs/linsysfs.c
@@ -633,6 +633,9 @@ linsysfs_init(PFS_INIT_ARGS)
 
        root = pi->pi_root;
 
+       /* /sys/bus/... */
+       dir = pfs_create_dir(root, "bus", NULL, NULL, NULL, 0);
+
        /* /sys/class/... */
        class = pfs_create_dir(root, "class", NULL, NULL, NULL, 0);
        scsi = pfs_create_dir(class, "scsi_host", NULL, NULL, NULL, 0);
@@ -679,6 +682,9 @@ linsysfs_init(PFS_INIT_ARGS)
        /* /sys/kernel/debug, mountpoint for lindebugfs. */
        debug = pfs_create_dir(kernel, "debug", NULL, NULL, NULL, 0);
 
+       /* /sys/subsystem/... */
+       dir = pfs_create_dir(root, "subsystem", NULL, NULL, NULL, 0);
+
        return (0);
 }
 

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