Subject: [PATCH] module loader should not complain about unknown symbol
From: Jan Glauber <jang@linux.vnet.ibm.com>
To: LKML <linux-kernel@vger.kernel.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>, Pavel Emelyanov <xemul@openvz.org>,
       Andi Kleen <andi@firstfloor.org>, Jon Masters <jonathan@jonmasters.org>
Content-Type: text/plain
Date: Mon, 12 Nov 2007 14:18:27 +0000
Message-Id: <1194877107.5656.31.camel@localhost.localdomain>
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Sender: linux-kernel-owner@vger.kernel.org
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If module A depends on module B and module B has not yet finished its
init() the module loader may print a warning about an unknown symbol.

This happens if module B is still in state MODULE_STATE_COMING,
as module A runs into resolve_symbol() for a symbol from module B.
resolve_symbol() return 0 in that case and causes the warning.

---
Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>

Index: linux-2.6/kernel/module.c
===================================================================
--- linux-2.6.orig/kernel/module.c	2007-11-12 13:53:44.000000000 +0000
+++ linux-2.6/kernel/module.c	2007-11-12 13:54:33.000000000 +0000
@@ -1411,8 +1411,8 @@
 			if (ELF_ST_BIND(sym[i].st_info) == STB_WEAK)
 				break;
 
-			printk(KERN_WARNING "%s: Unknown symbol %s\n",
-			       mod->name, strtab + sym[i].st_name);
+			DEBUGP("%s: Unknown symbol %s\n", mod->name,
+			       strtab + sym[i].st_name);
 			ret = -ENOENT;
 			break;

-
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