Author: brooks
Date: Sun Feb 11 18:37:08 2018
New Revision: 329128
URL: https://svnweb.freebsd.org/changeset/base/329128

Log:
  Use syscall_helper_register(9) rather than syscall_register().
  
  The usage is simpler, documented, and more common.
  
  Reviewed by:  cem
  Sponsored by: DARPA, AFRL
  Differential Revision:        https://reviews.freebsd.org/D14227

Modified:
  head/sys/kgssapi/gss_impl.c

Modified: head/sys/kgssapi/gss_impl.c
==============================================================================
--- head/sys/kgssapi/gss_impl.c Sun Feb 11 17:45:38 2018        (r329127)
+++ head/sys/kgssapi/gss_impl.c Sun Feb 11 18:37:08 2018        (r329128)
@@ -56,39 +56,33 @@ MALLOC_DEFINE(M_GSSAPI, "GSS-API", "GSS-API");
 /*
  * Syscall hooks
  */
-static int gssd_syscall_offset = SYS_gssd_syscall;
-static struct sysent gssd_syscall_prev_sysent;
-MAKE_SYSENT(gssd_syscall);
-static bool_t gssd_syscall_registered = FALSE;
+static struct syscall_helper_data gssd_syscalls[] = {
+       SYSCALL_INIT_HELPER(gssd_syscall),
+       SYSCALL_INIT_LAST
+};
 
 struct kgss_mech_list kgss_mechs;
 CLIENT *kgss_gssd_handle;
 struct mtx kgss_gssd_lock;
 
-static void
-kgss_init(void *dummy)
+static int
+kgss_load(void)
 {
        int error;
 
        LIST_INIT(&kgss_mechs);
-       error = syscall_register(&gssd_syscall_offset, &gssd_syscall_sysent,
-           &gssd_syscall_prev_sysent, SY_THR_STATIC_KLD);
-       if (error)
-               printf("Can't register GSSD syscall\n");
-       else
-               gssd_syscall_registered = TRUE;
+       error = syscall_helper_register(gssd_syscalls, SY_THR_STATIC_KLD);
+       if (error != 0)
+               return (error);
+       return (0);
 }
-SYSINIT(kgss_init, SI_SUB_LOCK, SI_ORDER_FIRST, kgss_init, NULL);
 
 static void
-kgss_uninit(void *dummy)
+kgss_unload(void)
 {
 
-       if (gssd_syscall_registered)
-               syscall_deregister(&gssd_syscall_offset,
-                   &gssd_syscall_prev_sysent);
+       syscall_helper_unregister(gssd_syscalls);
 }
-SYSUNINIT(kgss_uninit, SI_SUB_LOCK, SI_ORDER_FIRST, kgss_uninit, NULL);
 
 int
 sys_gssd_syscall(struct thread *td, struct gssd_syscall_args *uap)
@@ -293,6 +287,8 @@ kgssapi_modevent(module_t mod, int type, void *data)
 
        switch (type) {
        case MOD_LOAD:
+               if (error != 0)
+                       return (error);
                rpc_gss_entries.rpc_gss_refresh_auth = rpc_gss_refresh_auth;
                rpc_gss_entries.rpc_gss_secfind = rpc_gss_secfind;
                rpc_gss_entries.rpc_gss_secpurge = rpc_gss_secpurge;
@@ -317,8 +313,11 @@ kgssapi_modevent(module_t mod, int type, void *data)
                rpc_gss_entries.rpc_gss_svc_max_data_length =
                    rpc_gss_svc_max_data_length;
                mtx_init(&kgss_gssd_lock, "kgss_gssd_lock", NULL, MTX_DEF);
+               error = kgss_load();
                break;
        case MOD_UNLOAD:
+               kgss_unload();
+               mtx_destroy(&kgss_gssd_lock);
                /*
                 * Unloading of the kgssapi module is not currently supported.
                 * If somebody wants this, we would need to keep track of
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