linux-kernel - [PATCH -next v2] module: fix build error when CONFIG

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Date:   Tue, 25 May 2021 18:50:49 +0800
From:   Bixuan Cui <cuibixuan@...wei.com>
To:     <jeyu@...nel.org>
CC:     <sfr@...b.auug.org.au>, <swboyd@...omium.org>,
        <akpm@...ux-foundation.org>, <linux-kernel@...r.kernel.org>,
        Bixuan Cui <cuibixuan@...wei.com>
Subject: [PATCH -next v2] module: fix build error when CONFIG_SYSFS is disabled

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@...wei.com>
Signed-off-by: Bixuan Cui <cuibixuan@...wei.com>
Signed-off-by: Stephen Boyd <swboyd@...omium.org>
---
Changes from v2:
Put the sect_empty() definition outside of #ifdef CONFIG_SYSFS.

 kernel/module.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/kernel/module.c b/kernel/module.c
index decf4601e943..0543b44db81d 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -1462,6 +1462,13 @@ resolve_symbol_wait(struct module *mod,
 	return ksym;
 }
 
+#ifdef CONFIG_KALLSYMS
+static inline bool sect_empty(const Elf_Shdr *sect)
+{
+	return !(sect->sh_flags & SHF_ALLOC) || sect->sh_size == 0;
+}
+#endif
+
 /*
  * /sys/module/foo/sections stuff
  * J. Corbet <corbet@....net>
@@ -1469,11 +1476,6 @@ resolve_symbol_wait(struct module *mod,
 #ifdef CONFIG_SYSFS
 
 #ifdef CONFIG_KALLSYMS
-static inline bool sect_empty(const Elf_Shdr *sect)
-{
-	return !(sect->sh_flags & SHF_ALLOC) || sect->sh_size == 0;
-}
-
 struct module_sect_attr {
 	struct bin_attribute battr;
 	unsigned long address;
-- 
2.17.1