linux-kernel - [PATCH v4 08/11] livepatch: Remove module_disable

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Message-Id: <100e5d6720353ee26acf0dd01511884d509f8cc5.1588173720.git.jpoimboe@redhat.com>
Date:   Wed, 29 Apr 2020 10:24:50 -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 08/11] livepatch: Remove module_disable_ro() usage

With arch_klp_init_object_loaded() gone, and apply_relocate_add() now
using text_poke(), livepatch no longer needs to use module_disable_ro().

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>
---
 kernel/livepatch/core.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/kernel/livepatch/core.c b/kernel/livepatch/core.c
index f9ebb54affab..6b8b3c067be0 100644
--- a/kernel/livepatch/core.c
+++ b/kernel/livepatch/core.c
@@ -777,7 +777,6 @@ static int klp_init_object_loaded(struct klp_patch *patch,
 	if (klp_is_module(obj)) {
 
 		mutex_lock(&text_mutex);
-		module_disable_ro(patch->mod);
 
 		/*
 		 * Only write module-specific relocations here
@@ -787,7 +786,6 @@ static int klp_init_object_loaded(struct klp_patch *patch,
 		 */
 		ret = klp_apply_object_relocs(patch, obj);
 
-		module_enable_ro(patch->mod, true);
 		mutex_unlock(&text_mutex);
 
 		if (ret)
-- 
2.21.1