From patchwork Mon Nov 20 10:55:25 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Valentin Schneider X-Patchwork-Id: 13461022 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="OmpUXQne" Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 24B6410B for ; Mon, 20 Nov 2023 02:56:02 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1700477762; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=kLzyis6PUviTtG453OISXCu8S+f029z0hO21me12mCo=; b=OmpUXQnekbBfSUynClQ70Mj2ZhGbf5TyObJFxB/DP4mj1VVLih/y5xSgK+hODysh8Bzy5x jARMaMgl2LjkNW6TpzYBEpW0ic3Ell+JnAulOzQKolOMn79SMBpQ+0QZvUsXGDuPHp0JGO lyrccCk/vsB9kWJkKqZ3gYWy7z3UuFU= Received: from mimecast-mx02.redhat.com (mx-ext.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-425-tGNqKUofPWSoGRXtkEN_5Q-1; Mon, 20 Nov 2023 05:55:58 -0500 X-MC-Unique: tGNqKUofPWSoGRXtkEN_5Q-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id E407338157A4; Mon, 20 Nov 2023 10:55:56 +0000 (UTC) Received: from vschneid-thinkpadt14sgen2i.remote.csb (unknown [10.39.195.45]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 8846D2026D4C; Mon, 20 Nov 2023 10:55:52 +0000 (UTC) From: Valentin Schneider To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-arch@vger.kernel.org, x86@kernel.org Cc: Thomas Gleixner , Borislav Petkov , Peter Zijlstra , Josh Poimboeuf , Pawan Gupta , Ingo Molnar , Dave Hansen , "H. Peter Anvin" , Paolo Bonzini , Wanpeng Li , Vitaly Kuznetsov , Arnd Bergmann , Jason Baron , Steven Rostedt , Ard Biesheuvel , Frederic Weisbecker , "Paul E. McKenney" , Feng Tang , Andrew Morton , "Mike Rapoport (IBM)" , Vlastimil Babka , David Hildenbrand , "ndesaulniers@google.com" , Michael Kelley , "Masami Hiramatsu (Google)" Subject: [PATCH 2/5] context_tracking: Make context_tracking_key __ro_after_init Date: Mon, 20 Nov 2023 11:55:25 +0100 Message-ID: <20231120105528.760306-3-vschneid@redhat.com> In-Reply-To: <20231120105528.760306-1-vschneid@redhat.com> References: <20231120105528.760306-1-vschneid@redhat.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.4 context_tracking_key is only ever enabled in __init ct_cpu_tracker_user(), so mark it as __ro_after_init. Signed-off-by: Valentin Schneider --- kernel/context_tracking.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/context_tracking.c b/kernel/context_tracking.c index 6ef0b35fc28c5..cc4f3a57f848c 100644 --- a/kernel/context_tracking.c +++ b/kernel/context_tracking.c @@ -432,7 +432,7 @@ static __always_inline void ct_kernel_enter(bool user, int offset) { } #define CREATE_TRACE_POINTS #include -DEFINE_STATIC_KEY_FALSE(context_tracking_key); +DEFINE_STATIC_KEY_FALSE_RO(context_tracking_key); EXPORT_SYMBOL_GPL(context_tracking_key); static noinstr bool context_tracking_recursion_enter(void)