Tidy up a few things with syscall generation:

- Instead of using a syscall slot (370) just to get a function prototype
  for lkmressys(), add an explicit function prototype to <sys/sysent.h>.
  This also removes unused special case checks for 'lkmressys' from
  makesyscalls.sh.
- Instead of having magic logic in makesyscalls.sh to only generate a
  function prototype the first time 'lkmnosys' is seen, make 'NODEF'
  always not generate a function prototype and include an explicit
  prototype for 'lkmnosys' in <sys/sysent.h>.
- As a result of the fix in (2), update the LKM syscall entries in
  the freebsd32 syscall table to use 'lkmnosys' rather than 'nosys'.
- Use NOPROTO for the __syscall() entry (198) in the native ABI.  This
  avoids the need for magic logic in makesyscalls.h to only generate
  a function prototype the first time 'nosys' is encountered.

1 files changed, 6 insertions, 0 deletions

diff --git a/sys/sys/sysent.h b/sys/sys/sysent.h
index bdbd809..57459b1 100644
--- a/sys/sys/sysent.h
+++ b/sys/sys/sysent.h
@@ -156,6 +156,12 @@ int	syscall_register(int *offset, struct sysent *new_sysent,
 int	syscall_deregister(int *offset, struct sysent *old_sysent);
 int	syscall_module_handler(struct module *mod, int what, void *arg);
 
+/* Special purpose system call functions. */
+struct nosys_args;
+
+int	lkmnosys(struct thread *, struct nosys_args *);
+int	lkmressys(struct thread *, struct nosys_args *);
+
 #endif /* _KERNEL */
 
 #endif /* !_SYS_SYSENT_H_ */