From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: ** X-Spam-Status: No, score=2.5 required=3.0 tests=DKIM_ADSP_CUSTOM_MED, DKIM_INVALID,DKIM_SIGNED,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,HTML_MESSAGE,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8D4C1C4332B for ; Mon, 23 Mar 2020 10:30:28 +0000 (UTC) Received: from shelob.surriel.com (shelob.surriel.com [96.67.55.147]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 901F22072E for ; Mon, 23 Mar 2020 10:30:26 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="idEOstbP" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 901F22072E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kernelnewbies-bounces@kernelnewbies.org Received: from localhost ([::1] helo=shelob.surriel.com) by shelob.surriel.com with esmtp (Exim 4.92.3) (envelope-from ) id 1jGKKP-0003k0-Vk; Mon, 23 Mar 2020 06:29:06 -0400 Received: from mail-ua1-x92e.google.com ([2607:f8b0:4864:20::92e]) by shelob.surriel.com with esmtps (TLSv1.2:ECDHE-RSA-AES128-GCM-SHA256:128) (Exim 4.92.3) (envelope-from ) id 1jGKKN-0003jt-FT for kernelnewbies@kernelnewbies.org; Mon, 23 Mar 2020 06:29:03 -0400 Received: by mail-ua1-x92e.google.com with SMTP id o15so2918543ual.3 for ; Mon, 23 Mar 2020 03:29:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to; bh=btqFlXQPprWTZTCxSxxc+NBLCT8uqE49OatQ2944pcA=; b=idEOstbPbmOmOegYqRkm8Oe3YasS/SXMPf+g3Ac2T0WCkuGkgSTdwkuLfrHujv2Xm9 UbaJBmwygw4wzdQ8XVz2bI/wWOxosHxjJ21GKfrFrE1RNs1D8HAdkZn/mwIvTvLWSIAq AHidbfuqhuuYREcz06IT7N3q6IIoQR2Eaf2LDU9lXj6DzQgHHlmOG+8xQtsgYNQA+nqQ ge9GuySaPmVFELPRgCXYn0MDZVgd4lokn+tnYaDh2RsUxcGC43ORIFHsD+gnOY6Fc1uJ 3DIuaW+cS3MsQT3cE7IYTi3rvnVCcuU5N6YPGGY6m25LmQcaPGi4CW7fQopOaT8T6R9c KjIQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to; bh=btqFlXQPprWTZTCxSxxc+NBLCT8uqE49OatQ2944pcA=; b=lbbgxDYCvGwRxW+Hvde+IBXLRYy32TgzYP8fFimZlMR/ShCbOTb381+NfytUOeZMXI MPyGa0xBue6ye96UrRTO7rD4dSL8Q9t0lHr0o+8+6WAH8W7pmn2X9qM/5NAdAs/bRvL5 ChIX4mo937F2TSFAZ1C578cUQ29VSOYsQ62gQkEXv/+wMZirOZ1NgJLQQV569Kgo7a8Z qmUK/TtiIB10vnPWlx7014aKJOcB+/m/DDdf7oUnkK9gwVV7C+Ni2ZZQQqJAuu0Jtreu DD+xZPNRoUmWrGoHa3nAWhigXxRu0QB6daTbL9rN3NUZ6BCK/IHL31bLFJJpCsH5XjfF 5brQ== X-Gm-Message-State: ANhLgQ1dvqgRWFTTRIZvByCLv+tW5g5903LtaR4oqdgg6dVZ26RHoVM3 Lrd8vzDzCtS8vLvcQYiXU0vuLwHHJGFGVXaNeYfMsDUY X-Google-Smtp-Source: ADFU+vv2p4Wg7iIVazRyxA+juIv2+/1ysTlKCZ/2oasXlru24kPXiOLWYNmuRxtXA3oNbUBl8tx8mNgrgNzyF8cFc/k= X-Received: by 2002:ab0:344f:: with SMTP id a15mr13514090uaq.2.1584959281286; Mon, 23 Mar 2020 03:28:01 -0700 (PDT) MIME-Version: 1.0 From: Tomek The Messenger Date: Mon, 23 Mar 2020 11:27:50 +0100 Message-ID: Subject: Unknown symbol reboot_mode To: kernelnewbies@kernelnewbies.org X-BeenThere: kernelnewbies@kernelnewbies.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Learn about the Linux kernel List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============4786580058728040688==" Errors-To: kernelnewbies-bounces@kernelnewbies.org --===============4786580058728040688== Content-Type: multipart/alternative; boundary="000000000000f1cf3705a1831621" --000000000000f1cf3705a1831621 Content-Type: text/plain; charset="UTF-8" Hi When I insert external kernel module which is compiled out of tree I got error: root:/run# insmod ./my_module.ko [ 137.443823] my_module: Unknown symbol reboot_mode (err 0) I investigated that I have attached in my my_module.c file: #include and in this file we have: extern enum reboot_mode reboot_mode; However reboot_mode symbol is not exported with macro EXPORT_SYMBOL_GPL. Probably this is the reason why symbol is not seen in my module. Then why the same issue doesn't occur here: /arch/arm/kernel/setup.c /arch/arm64/kernel/process.c Those linux files also use global variable reboot_mode. --000000000000f1cf3705a1831621 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Hi
When I insert external kernel module which is compi= led out of tree I got error:

root:/run# insmod ./m= y_module.ko
[ =C2=A0137.443823] my_module: Unknown symbol reboot_mode (e= rr 0)

I investigated that I have attached in m= y my_module.c file:
#include <linux/reboot.h>
and in this file we have:
extern enum reboot_mode reboot_mode;
However reboot_mode symbol is not exported with macro=C2=A0EXP= ORT_SYMBOL_GPL.
Probably this is the reason why symbol is not see= n in my module. Then why the same issue doesn't occur here:
/= arch/arm/kernel/setup.c
/arch/arm64/kernel/process.c
Those linux files also use global variable reboot_mode. --000000000000f1cf3705a1831621-- --===============4786580058728040688== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies --===============4786580058728040688==--