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authorGreg Banks <gnb@melbourne.sgi.com>2006-10-02 02:17:58 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-02 07:57:19 -0700
commit9a24ab5749a31aa10ee60d9310ad72f24d7c38ab (patch)
treebae1805492889c3d59017571c062ce4a02e024aa
parent3262c816a3d7fb1eaabce633caa317887ed549ae (diff)
[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: Greg Banks <gnb@melbourne.sgi.com> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--fs/nfsd/nfssvc.c2
-rw-r--r--include/linux/sunrpc/svc.h11
2 files changed, 12 insertions, 1 deletions
diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c
index cdec3993e0d..9773f593b3f 100644
--- a/fs/nfsd/nfssvc.c
+++ b/fs/nfsd/nfssvc.c
@@ -200,7 +200,7 @@ int nfsd_create_serv(void)
int err = 0;
lock_kernel();
if (nfsd_serv) {
- nfsd_serv->sv_nrthreads++;
+ svc_get(nfsd_serv);
unlock_kernel();
return 0;
}
diff --git a/include/linux/sunrpc/svc.h b/include/linux/sunrpc/svc.h
index c27d806af31..54d8e7bc234 100644
--- a/include/linux/sunrpc/svc.h
+++ b/include/linux/sunrpc/svc.h
@@ -71,6 +71,17 @@ 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.
* This is use to determine the max number of pages nfsd is
* willing to return in a single READ operation.