From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BE28130FA7 for ; Wed, 20 Sep 2023 12:23:25 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 433D8C433C7; Wed, 20 Sep 2023 12:23:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1695212605; bh=0z1n0mMOsZN5kyMY5KqQL+zrv1BQL3cty13cUXweBA4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RsN63IUPNqPL3is66q3huvcUNVST02kZZYs3Efg9k4V95LAjulbYgm36/foI6gUi8 lYE9Dkf55JveKMYyskQs7DH1m2Z9nkYrVJvT7ns9h1f93MsuU9C8mpdBvFcZzbboAB 7a7XXYDTbci8Zf4dSFna/rQI4cS9YMbFN2Wtf6T4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Arnd Bergmann , Petr Mladek , Luis Chamberlain , Sasha Levin Subject: [PATCH 5.10 64/83] samples/hw_breakpoint: fix building without module unloading Date: Wed, 20 Sep 2023 13:31:54 +0200 Message-ID: <20230920112829.192836671@linuxfoundation.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20230920112826.634178162@linuxfoundation.org> References: <20230920112826.634178162@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.10-stable review patch. If anyone has any objections, please let me know. ------------------ From: Arnd Bergmann [ Upstream commit b9080468caeddc58a91edd1c3a7d212ea82b0d1d ] __symbol_put() is really meant as an internal helper and is not available when module unloading is disabled, unlike the previously used symbol_put(): samples/hw_breakpoint/data_breakpoint.c: In function 'hw_break_module_exit': samples/hw_breakpoint/data_breakpoint.c:73:9: error: implicit declaration of function '__symbol_put'; did you mean '__symbol_get'? [-Werror=implicit-function-declaration] The hw_break_module_exit() function is not actually used when module unloading is disabled, but it still causes the build failure for an undefined identifier. Enclose this one call in an appropriate #ifdef to clarify what the requirement is. Leaving out the entire exit function would also work but feels less clar in this case. Fixes: 910e230d5f1bb ("samples/hw_breakpoint: Fix kernel BUG 'invalid opcode: 0000'") Fixes: d8a84d33a4954 ("samples/hw_breakpoint: drop use of kallsyms_lookup_name()") Signed-off-by: Arnd Bergmann Reviewed-by: Petr Mladek Signed-off-by: Luis Chamberlain Signed-off-by: Sasha Levin --- samples/hw_breakpoint/data_breakpoint.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/samples/hw_breakpoint/data_breakpoint.c b/samples/hw_breakpoint/data_breakpoint.c index 9debd128b2ab8..b99322f188e59 100644 --- a/samples/hw_breakpoint/data_breakpoint.c +++ b/samples/hw_breakpoint/data_breakpoint.c @@ -70,7 +70,9 @@ static int __init hw_break_module_init(void) static void __exit hw_break_module_exit(void) { unregister_wide_hw_breakpoint(sample_hbp); +#ifdef CONFIG_MODULE_UNLOAD __symbol_put(ksym_name); +#endif printk(KERN_INFO "HW Breakpoint for %s write uninstalled\n", ksym_name); } -- 2.40.1