[PATCH -next] module: fix build error when CONFIG_SYSFS is disabled

[Bixuan Cui]

Fix build error when disable CONFIG_SYSFS:
kernel/module.c:2805:8: error: implicit declaration of function ‘sect_empty’; did you mean ‘desc_empty’? [-Werror=implicit-function-declaration]
 2805 |   if (!sect_empty(sechdr) && sechdr->sh_type == SHT_NOTE &&

Fixes: 9ee6682aa528 ("module: add printk formats to add module build ID to stacktraces")
Reported-by: Hulk Robot <hulkci@xxxxxxxxxx>
Signed-off-by: Bixuan Cui <cuibixuan@xxxxxxxxxx>
---
 kernel/module.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/kernel/module.c b/kernel/module.c
index decf4601e943..7287ecc76714 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_KALLSYMS) && IS_ENABLED(CONFIG_STACKTRACE_BUILD_ID) && \
+	IS_ENABLED(CONFIG_SYSFS)
 static void init_build_id(struct module *mod, const struct load_info *info)
 {
 	const Elf_Shdr *sechdr;
-- 
2.17.1