Commit 9a24ab57 authored by Greg Banks's avatar Greg Banks Committed by Linus Torvalds

[PATCH] knfsd: add svc_get

add svc_get() for those occasions when we need to temporarily bump up
svc_serv->sv_nrthreads as a pseudo refcount.
Signed-off-by: default avatarGreg Banks <gnb@melbourne.sgi.com>
Signed-off-by: default avatarNeil Brown <neilb@suse.de>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 3262c816
...@@ -200,7 +200,7 @@ int nfsd_create_serv(void) ...@@ -200,7 +200,7 @@ int nfsd_create_serv(void)
int err = 0; int err = 0;
lock_kernel(); lock_kernel();
if (nfsd_serv) { if (nfsd_serv) {
nfsd_serv->sv_nrthreads++; svc_get(nfsd_serv);
unlock_kernel(); unlock_kernel();
return 0; return 0;
} }
......
...@@ -70,6 +70,17 @@ struct svc_serv { ...@@ -70,6 +70,17 @@ struct svc_serv {
*/ */
}; };
/*
* We use sv_nrthreads as a reference count. svc_destroy() drops
* this refcount, so we need to bump it up around operations that
* change the number of threads. Horrible, but there it is.
* Should be called with the BKL held.
*/
static inline void svc_get(struct svc_serv *serv)
{
serv->sv_nrthreads++;
}
/* /*
* Maximum payload size supported by a kernel RPC server. * Maximum payload size supported by a kernel RPC server.
* This is use to determine the max number of pages nfsd is * This is use to determine the max number of pages nfsd is
......
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