[PATCH] nfsd: clear signals before exiting the nfsd() thread

Fixes the error "RPC: failed to contact portmap (errno -512)." when the server
later tries to unregister from the portmapper.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

fs/nfsd/nfssvc.c

@@ -258,6 +258,8 @@ nfsd(struct svc_rqst *rqstp)
 				break;
 		err = signo;
 	}
+	/* Clear signals before calling lockd_down() and svc_exit_thread() */
+	flush_signals(current);
 
 	lock_kernel();