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=BAYES_00,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 C03E4C433DB for ; Thu, 25 Mar 2021 15:13:49 +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 2328161879 for ; Thu, 25 Mar 2021 15:13:49 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2328161879 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 4.94) (envelope-from ) id 1lPRfr-0007dY-8T; Thu, 25 Mar 2021 11:13:27 -0400 Received: from mail-vs1-xe2f.google.com ([2607:f8b0:4864:20::e2f]) by shelob.surriel.com with esmtps (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.94) (envelope-from ) id 1lPRfm-0007dT-DV for kernelnewbies@kernelnewbies.org; Thu, 25 Mar 2021 11:13:22 -0400 Received: by mail-vs1-xe2f.google.com with SMTP id r11so1053783vsj.13 for ; Thu, 25 Mar 2021 08:13:22 -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=mY/68FawRasDnAZ1Mvdtv+XMenXHFD+5k/GDT32Vd9w=; b=heduZWfSbH6zxV8smOqABbArvmSN/DIZZx3X/iANFRGUzjdV0q43l0Rdmq8X63fG27 LMWFmUmYICbal3cJ2+TuCwCn1GyjGMZDy1aZ9P3TfZpi0to3S50p0FBFu7llgI4mDwpH B8m6tVPcNtvWcb17QF+tFN8yYyyTYuyxa/r+gYgq04u3EUwPFAecLssrRmrSM5R5WjFd AeimOibBgzbyuSmi5xXwufXD0E84qQ/PraBaDP1o2/y+EEivaHfPVpmXHNT+NKvlexEu fmpxeqTiYv5BszGcTXT5ViAxZ8iTohYk0QKwuXczr0KZU0OrbRXFZSkNQhft1+fA6Q/w Hb+A== 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=mY/68FawRasDnAZ1Mvdtv+XMenXHFD+5k/GDT32Vd9w=; b=hNbRZD6UH3YBUnuwrOaaCQgC8wVnZgSIyQTjYcasD7PvQMlwZ1koC3ByxtFGrfXRV6 MocQwupsv1nN2aoRwWU8627aMRZM+PSzHEoJERGo2KUGVtWjkeQ1fmR10xuqjcM+WeMI RUFR+m5M5vUQtH9ZOiQutWhCf/NqTDSsO+6cPRYQQZ9vKOpgj9aTmW8O1W7JRIVRagOz bz+4fGvJX6sCnhAu9oeFEiqrAousOcmMmQSZ9Myp0hbhnLZ+p9xmoXkbgsbihOd3rAHX z1xQ3+OnLPxBNdzodcMSIHN6At8ma8J9XcOoBcWuVXqSm4h4ByZK5nG7KIE09p6m+XLr EJPg== X-Gm-Message-State: AOAM5307kJwWTXbf/cfQVhacDHoAHYkZS9EOckziXDnrlRUNBEsMZBCx L4iG+m/NemascLCA3a0b6JdmfRhyOKXLEbX1sy5yPYEDUGE= X-Google-Smtp-Source: ABdhPJysop8qlVyaeUuXNqyGjKYBn/W+V8i4DLKLqZG6EN3YccJ6nL76T1nyj2jt4u0KSrEX6HFuny83Su5U+TGn2rI= X-Received: by 2002:a67:ef52:: with SMTP id k18mr5151493vsr.7.1616685198775; Thu, 25 Mar 2021 08:13:18 -0700 (PDT) MIME-Version: 1.0 From: jim.cromie@gmail.com Date: Thu, 25 Mar 2021 09:12:51 -0600 Message-ID: Subject: "module:find_symbol: Failed to find symbol ....." not so bad. To: kernelnewbies 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="===============8935816180397481804==" Errors-To: kernelnewbies-bounces@kernelnewbies.org --===============8935816180397481804== Content-Type: multipart/alternative; boundary="000000000000fc994c05be5ddaf0" --000000000000fc994c05be5ddaf0 Content-Type: text/plain; charset="UTF-8" so when I enable the pr_debug()s in kernel/module, and boot that kernel, I get a raft of messages (~800), like : [ 110.072535] module:find_symbol: Failed to find symbol drm_scdc_get_scrambling_status [ 110.072538] module:find_symbol: Failed to find symbol drm_scdc_read [ 110.072541] module:find_symbol: Failed to find symbol drm_scdc_set_high_tmds_clock_ratio [ 110.072545] module:find_symbol: Failed to find symbol drm_scdc_set_scrambling [ 110.072548] module:find_symbol: Failed to find symbol drm_scdc_write [ 110.072551] module:find_symbol: Failed to find symbol drm_self_refresh_helper_alter_state [ 110.072553] module:find_symbol: Failed to find symbol drm_self_refresh_helper_cleanup What is the potential importance of these ? clearly if it were a real problem, it wouldnt just be a debug message. Is there anything to fix here, either in local config, or in code ? --000000000000fc994c05be5ddaf0 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable

so when I enable the pr_debug()s in ke= rnel/module,
and boot that kernel, I get a raft of messages (~800= ),
like :


[ =C2=A0110.072535] = module:find_symbol: Failed to find symbol drm_scdc_get_scrambling_status[ =C2=A0110.072538] module:find_symbol: Failed to find symbol drm_scdc_rea= d
[ =C2=A0110.072541] module:find_symbol: Failed to find symbol drm_scdc= _set_high_tmds_clock_ratio
[ =C2=A0110.072545] module:find_symbol: Faile= d to find symbol drm_scdc_set_scrambling
[ =C2=A0110.072548] module:find= _symbol: Failed to find symbol drm_scdc_write
[ =C2=A0110.072551] module= :find_symbol: Failed to find symbol drm_self_refresh_helper_alter_state
= [ =C2=A0110.072553] module:find_symbol: Failed to find symbol drm_self_refr= esh_helper_cleanup


What is the potent= ial importance of these ?
clearly if it were a real problem, it w= ouldnt just be a debug message.
Is there anything to fix here, ei= ther in local config, or in code ?

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