From mboxrd@z Thu Jan 1 00:00:00 1970 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 69E3815E87 for ; Mon, 23 Oct 2023 11:31:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="gDIFpWQv" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D675BC433C9; Mon, 23 Oct 2023 11:31:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1698060715; bh=h5p4xmQ4wmJMfQeULjNBs70GiN6on0KkZOMZh0OOENo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=gDIFpWQvjmw07IE79jjMy+6avusLl4TTb0tiiWnEu99JsETomLQ69QHM/U5V7T78H 75nTZhs+BQGuNpUmuL9bmRj1VAKtrIANGw+kyTrYUj15W9Ybq/OzZD3nZ1LhpX4lg6 cm1P/+fCbCM23rcFytYEim6PsK8+5vgxUJiKx+U4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Christophe Leroy , Michael Ellerman , Sasha Levin Subject: [PATCH 5.4 041/123] powerpc/64e: Fix wrong test in __ptep_test_and_clear_young() Date: Mon, 23 Oct 2023 12:56:39 +0200 Message-ID: <20231023104819.103119139@linuxfoundation.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231023104817.691299567@linuxfoundation.org> References: <20231023104817.691299567@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Christophe Leroy [ Upstream commit 5ea0bbaa32e8f54e9a57cfee4a3b8769b80be0d2 ] Commit 45201c879469 ("powerpc/nohash: Remove hash related code from nohash headers.") replaced: if ((pte_val(*ptep) & (_PAGE_ACCESSED | _PAGE_HASHPTE)) == 0) return 0; By: if (pte_young(*ptep)) return 0; But it should be: if (!pte_young(*ptep)) return 0; Fix it. Fixes: 45201c879469 ("powerpc/nohash: Remove hash related code from nohash headers.") Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://msgid.link/8bb7f06494e21adada724ede47a4c3d97e879d40.1695659959.git.christophe.leroy@csgroup.eu Signed-off-by: Sasha Levin --- arch/powerpc/include/asm/nohash/64/pgtable.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/powerpc/include/asm/nohash/64/pgtable.h b/arch/powerpc/include/asm/nohash/64/pgtable.h index 9a33b8bd842d9..c32cb88a15750 100644 --- a/arch/powerpc/include/asm/nohash/64/pgtable.h +++ b/arch/powerpc/include/asm/nohash/64/pgtable.h @@ -244,7 +244,7 @@ static inline int __ptep_test_and_clear_young(struct mm_struct *mm, { unsigned long old; - if (pte_young(*ptep)) + if (!pte_young(*ptep)) return 0; old = pte_update(mm, addr, ptep, _PAGE_ACCESSED, 0, 0); return (old & _PAGE_ACCESSED) != 0; -- 2.40.1