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Modernize nfssvc(2) registartion.

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Use syscall_helper_register() to register syscalls and do it through the
module interface rather than sysinit.

This pattern is more common and easier to understand.

Reviewed by:	jhb
Sponsored by:	DARPA, AFRL
Differential Revision:	https://reviews.freebsd.org/D14232
This commit is contained in:
Brooks Davis 2018-02-08 20:09:42 +00:00
parent 56b4f63142
commit de55bbfc5b
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=329025
1 changed files with 7 additions and 12 deletions
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19
sys/nfs/nfs_nfssvc.c
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@ -56,9 +56,10 @@ __FBSDID("$FreeBSD$");
#include <nfs/nfssvc.h> #include <nfs/nfssvc.h>
static int nfssvc_offset = SYS_nfssvc; static struct syscall_helper_data nfssvc_syscalls[] = {
static struct sysent nfssvc_prev_sysent; SYSCALL_INIT_HELPER(nfssvc),
MAKE_SYSENT(nfssvc); SYSCALL_INIT_LAST
};
/* /*
* This tiny module simply handles the nfssvc() system call. The other * This tiny module simply handles the nfssvc() system call. The other
@ -119,16 +120,12 @@ sys_nfssvc(struct thread *td, struct nfssvc_args *uap)
static int static int
nfssvc_modevent(module_t mod, int type, void *data) nfssvc_modevent(module_t mod, int type, void *data)
{ {
static int registered;
int error = 0; int error = 0;
switch (type) { switch (type) {
case MOD_LOAD: case MOD_LOAD:
error = syscall_register(&nfssvc_offset, &nfssvc_sysent, error = syscall_helper_register(nfssvc_syscalls,
&nfssvc_prev_sysent, SY_THR_STATIC_KLD); SY_THR_STATIC_KLD);
if (error)
break;
registered = 1;
break; break;
case MOD_UNLOAD: case MOD_UNLOAD:
@ -137,9 +134,7 @@ nfssvc_modevent(module_t mod, int type, void *data)
error = EBUSY; error = EBUSY;
break; break;
} }
if (registered) syscall_helper_unregister(nfssvc_syscalls);
syscall_deregister(&nfssvc_offset, &nfssvc_prev_sysent);
registered = 0;
break; break;
default: default:
error = EOPNOTSUPP; error = EOPNOTSUPP;