From nobody Fri Jul 10 15:51:45 2026 Received: from metis.whiteo.stw.pengutronix.de (metis.whiteo.stw.pengutronix.de [185.203.201.7]) (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 DAF8F13B7AE for ; Thu, 23 May 2024 13:19:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.203.201.7 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716470366; cv=none; b=uEHPRov3pjNv8xuZeB7eO4yrkZMvvnEzdiRAn4HeJpXRY9h7wgH1BV0VRrLqMiv3Tmran/vPjMMLZ+DmVCFZYSo/y8V1xPZZPdyrYg/EN+4PCyovEbi7CKEh+jFBATWcA5iPe5uwx8PjiiKWOeVuGCsUD2UyNmSOhJRJ95Cg/UY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716470366; c=relaxed/simple; bh=BCNVEcgkU7+tO0w4DqWtv5Adc7V8KuJiUTOcc0wVbu8=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:To:Cc; b=ggaOUeo8McYSoKqAZX8Y5fAk1TFeuDrbON/zTPp3gmRPfuhI7AhSM16K/bE3uoOeahWUWYJX89jAbHr7ue210iGfuDoS7fkZG+PwJtEZAKKX9NfCojv9A7MlmOJksgYjGjHAZpHclFH+RoOjLUgUdzvn1dYCK2K03YOIv9Fo11A= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=pengutronix.de; spf=pass smtp.mailfrom=pengutronix.de; arc=none smtp.client-ip=185.203.201.7 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=pengutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=pengutronix.de Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1sA8LW-0002sd-B1; Thu, 23 May 2024 15:19:02 +0200 Received: from [2a0a:edc0:0:1101:1d::54] (helo=dude05.red.stw.pengutronix.de) by drehscheibe.grey.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1sA8LR-002fRe-S9; Thu, 23 May 2024 15:18:57 +0200 Received: from localhost ([::1] helo=dude05.red.stw.pengutronix.de) by dude05.red.stw.pengutronix.de with esmtp (Exim 4.96) (envelope-from ) id 1sA8LR-005g9l-2d; Thu, 23 May 2024 15:18:57 +0200 From: Ahmad Fatoum Date: Thu, 23 May 2024 15:18:29 +0200 Subject: [PATCH] docs: crypto: async-tx-api: fix broken code example Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20240523-async-dma-docs-v1-1-b900e0804e11@pengutronix.de> X-B4-Tracking: v=1; b=H4sIACRCT2YC/x3MMQqAMAxA0atIZgNprSBeRRxqGzWDVRoQRby7x fEN/z+gnIUV+uqBzKeo7KnA1BWE1aeFUWIxWLKOWtug1zsFjJvHuAdFIp5M5x2TCVCiI/Ms1z8 cxvf9AHQBbaBgAAAA To: Dan Williams , Herbert Xu , "David S. Miller" , Jonathan Corbet , Maciej Sosnowski , Andre Noll Cc: linux-crypto@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, kernel@pengutronix.de, Ahmad Fatoum X-Mailer: b4 0.13-dev X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: a.fatoum@pengutronix.de X-SA-Exim-Scanned: No (on metis.whiteo.stw.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-kernel@vger.kernel.org The code example fails to compile: 1) ddr_conv is defined twice, once as a VLA, which have been phased out 2) submit is not a pointer, but is still dereferenced with -> Fix these issues and while at it, make the functions static as users are unlikely to export them. Fixes: 04ce9ab385dc ("async_xor: permit callers to pass in a 'dma/page scri= bble' region") Signed-off-by: Ahmad Fatoum --- Documentation/crypto/async-tx-api.rst | 24 ++++++++++++------------ 1 file changed, 12 insertions(+), 12 deletions(-) diff --git a/Documentation/crypto/async-tx-api.rst b/Documentation/crypto/a= sync-tx-api.rst index 27c146b54d71..2fa260f2a222 100644 --- a/Documentation/crypto/async-tx-api.rst +++ b/Documentation/crypto/async-tx-api.rst @@ -150,38 +150,38 @@ of an operation. Perform a xor->copy->xor operation where each operation depends on the result from the previous operation:: =20 - void callback(void *param) + static void callback(void *param) { struct completion *cmp =3D param; =20 complete(cmp); } =20 - void run_xor_copy_xor(struct page **xor_srcs, - int xor_src_cnt, - struct page *xor_dest, - size_t xor_len, - struct page *copy_src, - struct page *copy_dest, - size_t copy_len) + #define NDISKS 2 + + static void run_xor_copy_xor(struct page **xor_srcs, + struct page *xor_dest, + size_t xor_len, + struct page *copy_src, + struct page *copy_dest, + size_t copy_len) { struct dma_async_tx_descriptor *tx; - addr_conv_t addr_conv[xor_src_cnt]; struct async_submit_ctl submit; addr_conv_t addr_conv[NDISKS]; struct completion cmp; =20 init_async_submit(&submit, ASYNC_TX_XOR_DROP_DST, NULL, NULL, NULL, addr_conv); - tx =3D async_xor(xor_dest, xor_srcs, 0, xor_src_cnt, xor_len, &submit) + tx =3D async_xor(xor_dest, xor_srcs, 0, NDISKS, xor_len, &submit); =20 - submit->depend_tx =3D tx; + submit.depend_tx =3D tx; tx =3D async_memcpy(copy_dest, copy_src, 0, 0, copy_len, &submit); =20 init_completion(&cmp); init_async_submit(&submit, ASYNC_TX_XOR_DROP_DST | ASYNC_TX_ACK, tx, callback, &cmp, addr_conv); - tx =3D async_xor(xor_dest, xor_srcs, 0, xor_src_cnt, xor_len, &submit= ); + tx =3D async_xor(xor_dest, xor_srcs, 0, NDISKS, xor_len, &submit); =20 async_tx_issue_pending_all(); =20 --- base-commit: a38297e3fb012ddfa7ce0321a7e5a8daeb1872b6 change-id: 20240523-async-dma-docs-00eb18a4e01c Best regards, --=20 Ahmad Fatoum