linux-kernel - [PATCH v4 09/11] module: Remove module_disable

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Message-Id: <9684509017022ad6738560a85bb984210a4025b0.1588173720.git.jpoimboe@redhat.com>
Date:   Wed, 29 Apr 2020 10:24:51 -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 09/11] module: Remove module_disable_ro()

module_disable_ro() has no more users.  Remove it.

Signed-off-by: Josh Poimboeuf <jpoimboe@...hat.com>
Acked-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Acked-by: Joe Lawrence <joe.lawrence@...hat.com>
Acked-by: Miroslav Benes <mbenes@...e.cz>
---
 include/linux/module.h |  2 --
 kernel/module.c        | 13 -------------
 2 files changed, 15 deletions(-)

diff --git a/include/linux/module.h b/include/linux/module.h
index 1ad393e62bef..e4ef7b36feda 100644
--- a/include/linux/module.h
+++ b/include/linux/module.h
@@ -860,10 +860,8 @@ extern int module_sysfs_initialized;
 
 #ifdef CONFIG_STRICT_MODULE_RWX
 extern void module_enable_ro(const struct module *mod, bool after_init);
-extern void module_disable_ro(const struct module *mod);
 #else
 static inline void module_enable_ro(const struct module *mod, bool after_init) { }
-static inline void module_disable_ro(const struct module *mod) { }
 #endif
 
 #ifdef CONFIG_GENERIC_BUG
diff --git a/kernel/module.c b/kernel/module.c
index 96b2575329f4..f0e414a01d91 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -2016,19 +2016,6 @@ static void frob_writable_data(const struct module_layout *layout,
 		   (layout->size - layout->ro_after_init_size) >> PAGE_SHIFT);
 }
 
-/* livepatching wants to disable read-only so it can frob module. */
-void module_disable_ro(const struct module *mod)
-{
-	if (!rodata_enabled)
-		return;
-
-	frob_text(&mod->core_layout, set_memory_rw);
-	frob_rodata(&mod->core_layout, set_memory_rw);
-	frob_ro_after_init(&mod->core_layout, set_memory_rw);
-	frob_text(&mod->init_layout, set_memory_rw);
-	frob_rodata(&mod->init_layout, set_memory_rw);
-}
-
 void module_enable_ro(const struct module *mod, bool after_init)
 {
 	if (!rodata_enabled)
-- 
2.21.1