From nobody Fri Dec 19 18:59:13 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 74D8C2980C7 for ; Fri, 11 Apr 2025 05:42:14 +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=1744350134; cv=none; b=cWvLTa76IDzLA+LVGjbriMHg5p0O3pSNz7iaG4edt1XKpH4FZWOel7YiwHfvSmDAc5khNY2Ld3WUnL7W/gMHKkm/cvMebRJZn8Ucg8EFNqIX3Abg8FmuVnTNagDvYD7f605e1WhGQ2Ak61W+emQmkDf9CjAQPVF+AEkuo3CUerw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744350134; c=relaxed/simple; bh=ksgKsThUr934SDiegLpXIFwyJxxeAEKWgbZq2X+31d4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=o2ztJMw8sNR2NIV0ljVyE+hwTPAlNbrFvtjXVH7+1ySavLTm7qT42rzg5JcQn/BnFrh8L9WFuyhzBq5P5Jsy3lqK76hqwxHfS4bi9THmBAewlyigLpVQnjS42h+kkcWz67hIgA6zV/N2OniDhurW1IXrNNTWlI03WSCEm26TFQs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=KroPtlNS; 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="KroPtlNS" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6C648C4CEE2; Fri, 11 Apr 2025 05:42:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1744350134; bh=ksgKsThUr934SDiegLpXIFwyJxxeAEKWgbZq2X+31d4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=KroPtlNSnjk3T0QrcLHrKVQsODTR8VdxddVkzwQUF1jOADMlLVMZ8zuDdHcRO01/m dcgu3BjSUpU4HbAtfaB+MX742Jy2LNYiIRyJuAcglNwdxWGmTHAp62rNdqTlMETWYj qNr+pJApemRR+x89nBVld8AFtf+5D9SKZ4cvbV+k+ejTzweED/v8OE/OTMfv6S/vIi koL9VMycb9o0AaksfwOLmiQ4/HFPe8t9NRI18td6ajau9WTJ0EhVVnEoKN/IUAFFqR 71bhl/8XJocC7o9QzsiY33ppVIU3PCrnvzy8dI73yBp8fYC+aA+iGQ9JONUNyDvuK1 LJjd3+lUYPFxg== 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 26/53] x86/alternatives: Assert input parameters in smp_text_poke_batch_process() Date: Fri, 11 Apr 2025 07:40:38 +0200 Message-ID: <20250411054105.2341982-27-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" At this point the 'tp' input parameter must always be the global 'tp_vec' array, and 'nr_entries' must always be equal to 'tp_vec_nr'. Assert these conditions - which will allow the removal of a layer of indirection between these values. Signed-off-by: Ingo Molnar --- arch/x86/kernel/alternative.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/x86/kernel/alternative.c b/arch/x86/kernel/alternative.c index aa369870dfce..ee6ff7660563 100644 --- a/arch/x86/kernel/alternative.c +++ b/arch/x86/kernel/alternative.c @@ -2627,6 +2627,9 @@ static void smp_text_poke_batch_process(struct smp_te= xt_poke_loc *tp, unsigned i =20 lockdep_assert_held(&text_mutex); =20 + WARN_ON_ONCE(tp !=3D tp_vec); + WARN_ON_ONCE(nr_entries !=3D tp_vec_nr); + int3_vec.vec =3D tp; int3_vec.nr_entries =3D nr_entries; =20 --=20 2.45.2