CVS commit: src/sys/kern

["Juergen Hannken-Illjes" <hannken%netbsd.org@localhost>]

Module Name:    src
Committed By:   hannken
Date:           Mon Aug 22 09:14:59 UTC 2022

Modified Files:
        src/sys/kern: vfs_lookup.c

Log Message:
Use fstrans_start()/fstrans_done() to cross the mount in lookup_crossmount().
It is sufficient here as it prevents the file system from unmount and
makes it safe to use VFS_ROOT() here.

Removes a rare deadlock where one thread has "foundobj" locked and waits
for "foundobj->v_mountedhere" to resume while the thread holding the file
system suspended tries to lookup a node and needs a lock on "foundobj".


To generate a diff of this commit:
cvs rdiff -u -r1.231 -r1.232 src/sys/kern/vfs_lookup.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.