From nobody Fri Dec 19 17:42:05 2025 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 75D782BE7AC for ; Fri, 11 Apr 2025 05:43:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744350196; cv=none; b=srgswKZZY6hMTxbmT+IEo+iCc1Ea09ITkcpp3Ft1g0AUBcvWhQYvR4vkPfM8kCI4IQexeZppEwA/afrPAF0a2EVywpHLHJLxfHpH0VSgz4+/UxVNWIN6tAoFQ4DBqA3cRJzsqOi+VkUD4T4ZH1yPdP0T1+yV7uLfeSWTqE63GiA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744350196; c=relaxed/simple; bh=EFn+5AyjrVdlK00O2v7ECfvpshL8IgYUH9Ij5AZDLac=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=OI5g5+YcydTx1WOIIgPN5w2N9/cFSO9Xm+MnH4Nd3XC6+OfjJh1uH7NTjeo0GgrQXVKneiMSS17VIBnRfqVrybhdiigQnCd+MpER4uwxc7y5M6agU0Y30vlFQedfhoUITz4XJQ7jHGHDrVKtbsfcgiJOO2rZnJEQhYqqYuvex+w= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=KuRLmuTj; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="KuRLmuTj" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 65E33C4CEE5; Fri, 11 Apr 2025 05:43:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1744350196; bh=EFn+5AyjrVdlK00O2v7ECfvpshL8IgYUH9Ij5AZDLac=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=KuRLmuTj1Y5U/2VgaJkOtj/ToLebzAdyPU0s/vWeke84VGZIzhdYjT7Z3ow5kQYaE NDufGw7EDINZ2lfVnEvCGQrxhkh0e159jCGjJE0+9oL1xeD71l7dF7ue/J+bakJuxU TQ9McPRWSayEbBAhCi/LDXYptHoXpxAidq+CNMP7WOwWXaOvnkZ6Zr6YuxUC9C6rPi qdU4fl9VCgamD7Sf0rF8hOGWcxZonZh9PUwnyuHZSVwP7h2nKeJ3HR561KDhL24PBm +3xThuz1eCHdew6H/KWhPv7k94S8cARP/wrxiMBEuTSHiQZmj2GaYtW4I0AlyFHj6I enCvCgkLVSD5g== From: Ingo Molnar To: linux-kernel@vger.kernel.org Cc: Juergen Gross , "H . Peter Anvin" , Linus Torvalds , Peter Zijlstra , Borislav Petkov , Thomas Gleixner , Ingo Molnar Subject: [PATCH 52/53] x86/alternatives: Add comment about noinstr expectations Date: Fri, 11 Apr 2025 07:41:04 +0200 Message-ID: <20250411054105.2341982-53-mingo@kernel.org> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20250411054105.2341982-1-mingo@kernel.org> References: <20250411054105.2341982-1-mingo@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Signed-off-by: Ingo Molnar --- arch/x86/kernel/alternative.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/x86/kernel/alternative.c b/arch/x86/kernel/alternative.c index 231b2acbe360..604dd608d281 100644 --- a/arch/x86/kernel/alternative.c +++ b/arch/x86/kernel/alternative.c @@ -2447,6 +2447,11 @@ static struct smp_text_poke_array { =20 static DEFINE_PER_CPU(atomic_t, text_poke_array_refs); =20 +/* + * These four __always_inline annotations imply noinstr, necessary + * due to smp_text_poke_int3_handler() being noinstr: + */ + static __always_inline bool try_get_text_poke_array(void) { atomic_t *refs =3D this_cpu_ptr(&text_poke_array_refs); --=20 2.45.2