[PATCH] kNFSd: exp_find(): remove null pointer check

If ek = exp_find_key() is not an error, then ek->ek_export should be set; no
point in checking if it's NULL.

From: "J. Bruce Fields" <bfields@fieldses.org>
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>

include/linux/nfsd/export.h

@@ -124,8 +124,7 @@ exp_find(struct auth_domain *clp, int fsid_type, u32 *fsidv,
 		int err;
 		exp_get(exp);
 		expkey_put(&ek->h, &svc_expkey_cache);
-		if (exp &&
-		    (err = cache_check(&svc_export_cache, &exp->h, reqp)))
+		if ((err = cache_check(&svc_export_cache, &exp->h, reqp)))
 			exp = ERR_PTR(err);
 		return exp;
 	} else