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From:   Valentin Schneider <vschneid@redhat.com>
To:     linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
        linux-arch@vger.kernel.org, x86@kernel.org
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Subject: [PATCH 4/5] x86/speculation: Make mds_user_clear __ro_after_init
Date:   Mon, 20 Nov 2023 11:55:27 +0100
Message-ID: <20231120105528.760306-5-vschneid@redhat.com>
In-Reply-To: <20231120105528.760306-1-vschneid@redhat.com>
References: <20231120105528.760306-1-vschneid@redhat.com>
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mds_user_clear is only ever enabled in:
o __init mds_select_mitigation()
o __init taa_select_mitigation()
o __init mmio_select_mitigation()

mark it as __ro_after_init.

Signed-off-by: Valentin Schneider <vschneid@redhat.com>
---
 arch/x86/kernel/cpu/bugs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c
index bb0ab8466b919..bab36096015d8 100644
--- a/arch/x86/kernel/cpu/bugs.c
+++ b/arch/x86/kernel/cpu/bugs.c
@@ -112,7 +112,7 @@ DEFINE_STATIC_KEY_FALSE(switch_mm_cond_ibpb);
 DEFINE_STATIC_KEY_FALSE(switch_mm_always_ibpb);
 
 /* Control MDS CPU buffer clear before returning to user space */
-DEFINE_STATIC_KEY_FALSE(mds_user_clear);
+DEFINE_STATIC_KEY_FALSE_RO(mds_user_clear);
 EXPORT_SYMBOL_GPL(mds_user_clear);
 /* Control MDS CPU buffer clear before idling (halt, mwait) */
 DEFINE_STATIC_KEY_FALSE(mds_idle_clear);
-- 
2.41.0