From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 59C15C05027 for ; Thu, 26 Jan 2023 23:18:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229547AbjAZXSM (ORCPT ); Thu, 26 Jan 2023 18:18:12 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39480 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230205AbjAZXSL (ORCPT ); Thu, 26 Jan 2023 18:18:11 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8032935241 for ; Thu, 26 Jan 2023 15:18:10 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 3DCEAB81ED5 for ; Thu, 26 Jan 2023 23:18:09 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D552EC4339B; Thu, 26 Jan 2023 23:18:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1674775087; bh=RjFkp71PybJhRphFv+xl2dioetuA5Zz8XA54PMERcqg=; h=Date:To:From:Subject:From; b=r4Q1igayQvVBidoETtOPXH5ph4EQF+2U5ySgkQWgJed/T5YmNOTInUmv9tv8aPakl FRy7p1pKGLFajSdmIhGppnGNdO842+TEzlDu6F8RGXvuOKjVlc20dpqGeYjH5w/uSO aODs5RaYIww3rh7l3C93ZwuoGiWh2313b5e8PtXE= Date: Thu, 26 Jan 2023 15:18:07 -0800 To: mm-commits@vger.kernel.org, iii@linux.ibm.com, hca@linux.ibm.com, gor@linux.ibm.com, zaslonko@linux.ibm.com, akpm@linux-foundation.org From: Andrew Morton Subject: + lib-zlib-implement-switching-between-dfltcc-and-software.patch added to mm-nonmm-unstable branch Message-Id: <20230126231807.D552EC4339B@smtp.kernel.org> Precedence: bulk Reply-To: linux-kernel@vger.kernel.org List-ID: X-Mailing-List: mm-commits@vger.kernel.org The patch titled Subject: lib/zlib: implement switching between DFLTCC and software has been added to the -mm mm-nonmm-unstable branch. Its filename is lib-zlib-implement-switching-between-dfltcc-and-software.patch This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/lib-zlib-implement-switching-between-dfltcc-and-software.patch This patch will later appear in the mm-nonmm-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/process/submit-checklist.rst when testing your code *** The -mm tree is included into linux-next via the mm-everything branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm and is updated there every 2-3 working days ------------------------------------------------------ From: Mikhail Zaslonko Subject: lib/zlib: implement switching between DFLTCC and software Date: Thu, 26 Jan 2023 14:14:22 +0100 This commit is based on: https://github.com/zlib-ng/zlib-ng/commit/fc04275 Link: https://lkml.kernel.org/r/20230126131428.1222214-3-zaslonko@linux.ibm.com Signed-off-by: Mikhail Zaslonko Acked-by: Ilya Leoshkevich Cc: Heiko Carstens Cc: Vasily Gorbik Signed-off-by: Andrew Morton --- lib/zlib_dfltcc/dfltcc_deflate.c | 38 ++++++++++++++++------------- 1 file changed, 22 insertions(+), 16 deletions(-) --- a/lib/zlib_dfltcc/dfltcc_deflate.c~lib-zlib-implement-switching-between-dfltcc-and-software +++ a/lib/zlib_dfltcc/dfltcc_deflate.c @@ -112,30 +112,36 @@ int dfltcc_deflate( int soft_bcc; int no_flush; - if (!dfltcc_can_deflate(strm)) + if (!dfltcc_can_deflate(strm)) { + /* Clear history. */ + if (flush == Z_FULL_FLUSH) + param->hl = 0; return 0; + } again: masked_avail_in = 0; soft_bcc = 0; no_flush = flush == Z_NO_FLUSH; - /* Trailing empty block. Switch to software, except when Continuation Flag - * is set, which means that DFLTCC has buffered some output in the - * parameter block and needs to be called again in order to flush it. + /* No input data. Return, except when Continuation Flag is set, which means + * that DFLTCC has buffered some output in the parameter block and needs to + * be called again in order to flush it. */ - if (flush == Z_FINISH && strm->avail_in == 0 && !param->cf) { - if (param->bcf) { - /* A block is still open, and the hardware does not support closing - * blocks without adding data. Thus, close it manually. - */ + if (strm->avail_in == 0 && !param->cf) { + /* A block is still open, and the hardware does not support closing + * blocks without adding data. Thus, close it manually. + */ + if (!no_flush && param->bcf) { send_eobs(strm, param); param->bcf = 0; } - return 0; - } - - if (strm->avail_in == 0 && !param->cf) { + /* Let one of deflate_* functions write a trailing empty block. */ + if (flush == Z_FINISH) + return 0; + /* Clear history. */ + if (flush == Z_FULL_FLUSH) + param->hl = 0; *result = need_more; return 1; } @@ -189,7 +195,7 @@ again: param->cvt = CVT_ADLER32; if (!no_flush) /* We need to close a block. Always do this in software - when there is - * no input data, the hardware will not nohor BCC. */ + * no input data, the hardware will not hohor BCC. */ soft_bcc = 1; if (flush == Z_FINISH && !param->bcf) /* We are about to open a BFINAL block, set Block Header Final bit @@ -204,8 +210,8 @@ again: param->sbb = (unsigned int)state->bi_valid; if (param->sbb > 0) *strm->next_out = (Byte)state->bi_buf; - if (param->hl) - param->nt = 0; /* Honor history */ + /* Honor history and check value */ + param->nt = 0; param->cv = strm->adler; /* When opening a block, choose a Huffman-Table Type */ _ Patches currently in -mm which might be from zaslonko@linux.ibm.com are lib-zlib-adjust-offset-calculation-for-dfltcc_state.patch lib-zlib-implement-switching-between-dfltcc-and-software.patch lib-zlib-fix-dfltcc-not-flushing-eobs-when-creating-raw-streams.patch lib-zlib-fix-dfltcc-ignoring-flush-modes-when-avail_in-==-0.patch lib-zlib-dfltcc-not-writing-header-bits-when-avail_out-==-0.patch lib-zlib-split-deflate-and-inflate-states-for-dfltcc.patch lib-zlib-dfltcc-support-inflate-with-small-window.patch lib-zlib-dfltcc-always-switch-to-software-inflate-for-z_packet_flush-option.patch