linux-kernel - [PATCH v4 11/11] module: Make module_enable

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Date:   Wed, 29 Apr 2020 10:24:53 -0500
From:   Josh Poimboeuf <jpoimboe@...hat.com>
To:     live-patching@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org,
        Peter Zijlstra <peterz@...radead.org>,
        Jessica Yu <jeyu@...nel.org>,
        Joe Lawrence <joe.lawrence@...hat.com>,
        Miroslav Benes <mbenes@...e.cz>
Subject: [PATCH v4 11/11] module: Make module_enable_ro() static again

Now that module_enable_ro() has no more external users, make it static
again.

Suggested-by: Jessica Yu <jeyu@...nel.org>
Signed-off-by: Josh Poimboeuf <jpoimboe@...hat.com>
---
 include/linux/module.h | 6 ------
 kernel/module.c        | 4 ++--
 2 files changed, 2 insertions(+), 8 deletions(-)

diff --git a/include/linux/module.h b/include/linux/module.h
index e4ef7b36feda..2c2e988bcf10 100644
--- a/include/linux/module.h
+++ b/include/linux/module.h
@@ -858,12 +858,6 @@ extern int module_sysfs_initialized;
 
 #define __MODULE_STRING(x) __stringify(x)
 
-#ifdef CONFIG_STRICT_MODULE_RWX
-extern void module_enable_ro(const struct module *mod, bool after_init);
-#else
-static inline void module_enable_ro(const struct module *mod, bool after_init) { }
-#endif
-
 #ifdef CONFIG_GENERIC_BUG
 void module_bug_finalize(const Elf_Ehdr *, const Elf_Shdr *,
 			 struct module *);
diff --git a/kernel/module.c b/kernel/module.c
index f0e414a01d91..572d626508d2 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -2016,7 +2016,7 @@ static void frob_writable_data(const struct module_layout *layout,
 		   (layout->size - layout->ro_after_init_size) >> PAGE_SHIFT);
 }
 
-void module_enable_ro(const struct module *mod, bool after_init)
+static void module_enable_ro(const struct module *mod, bool after_init)
 {
 	if (!rodata_enabled)
 		return;
@@ -2057,7 +2057,7 @@ static int module_enforce_rwx_sections(Elf_Ehdr *hdr, Elf_Shdr *sechdrs,
 }
 
 #else /* !CONFIG_STRICT_MODULE_RWX */
-/* module_{enable,disable}_ro() stubs are in module.h */
+static void module_enable_ro(const struct module *mod, bool after_init) {}
 static void module_enable_nx(const struct module *mod) { }
 static int module_enforce_rwx_sections(Elf_Ehdr *hdr, Elf_Shdr *sechdrs,
 				       char *secstrings, struct module *mod)
-- 
2.21.1