failed to apply patch:
checking file sys/kern/kern_ktrace.c
Hunk #1 succeeded at 806 with fuzz 2 (offset -1 lines).
Hunk #2 FAILED at 856.
1 out of 2 hunks FAILED
checking file sys/kern/kern_turnstile.c
Hunk #1 succeeded at 383 (offset -1 lines).
checking file sys/kern/vfs_syscalls.c