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[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>
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3262c816a3
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2 changed files with 12 additions and 1 deletions
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@ -200,7 +200,7 @@ int nfsd_create_serv(void)
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int err = 0;
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int err = 0;
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lock_kernel();
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lock_kernel();
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if (nfsd_serv) {
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if (nfsd_serv) {
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nfsd_serv->sv_nrthreads++;
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svc_get(nfsd_serv);
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unlock_kernel();
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unlock_kernel();
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return 0;
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return 0;
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}
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}
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@ -70,6 +70,17 @@ struct svc_serv {
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*/
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*/
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};
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};
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/*
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* We use sv_nrthreads as a reference count. svc_destroy() drops
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* this refcount, so we need to bump it up around operations that
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* change the number of threads. Horrible, but there it is.
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* Should be called with the BKL held.
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*/
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static inline void svc_get(struct svc_serv *serv)
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{
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serv->sv_nrthreads++;
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}
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/*
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/*
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* Maximum payload size supported by a kernel RPC server.
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* Maximum payload size supported by a kernel RPC server.
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* This is use to determine the max number of pages nfsd is
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* This is use to determine the max number of pages nfsd is
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