linux-kernel - [PATCH] module: fix compile error that sect_empty() is not defined in init_build

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Message-ID: <20210527111453.195014-1-yukuai3@huawei.com>
Date:   Thu, 27 May 2021 19:14:53 +0800
From:   Yu Kuai <yukuai3@...wei.com>
To:     <jeyu@...nel.org>
CC:     <linux-kernel@...r.kernel.org>, <yukuai3@...wei.com>,
        <yi.zhang@...wei.com>
Subject: [PATCH] module: fix compile error that sect_empty() is not defined in init_build_id()

If 'CONFIG_SYS' is not enabled while 'CONFIG_KALLSYMS' is enabled,
fix following compile error:

kernel/module.c:2805:8: error: implicit declaration of function ‘sect_empty’;
did you mean ‘desc_empty’? [-Werror=implicit-function-declaration]

Signed-off-by: Yu Kuai <yukuai3@...wei.com>
---
 kernel/module.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/kernel/module.c b/kernel/module.c
index decf4601e943..173acb2aecc7 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -2794,7 +2794,8 @@ static void add_kallsyms(struct module *mod, const struct load_info *info)
 }
 #endif /* CONFIG_KALLSYMS */
 
-#if IS_ENABLED(CONFIG_KALLSYMS) && IS_ENABLED(CONFIG_STACKTRACE_BUILD_ID)
+#if IS_ENABLED(CONFIG_SYSFS) && IS_ENABLED(CONFIG_KALLSYMS) &&\
+	IS_ENABLED(CONFIG_STACKTRACE_BUILD_ID)
 static void init_build_id(struct module *mod, const struct load_info *info)
 {
 	const Elf_Shdr *sechdr;
-- 
2.25.4