From patchwork Mon Jan 16 20:50:57 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kemeng Shi X-Patchwork-Id: 44120 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:adf:eb09:0:0:0:0:0 with SMTP id s9csp1181791wrn; Mon, 16 Jan 2023 05:08:26 -0800 (PST) X-Google-Smtp-Source: AMrXdXvIwmi+jku03JBhbg02WZzRzUDNi6Txh4Ck4HoTMN1fyx1ZXtmeayeU7h6jse7yCyajt6wJ X-Received: by 2002:a17:906:c250:b0:79e:4880:dd85 with SMTP id bl16-20020a170906c25000b0079e4880dd85mr69872701ejb.47.1673874506179; Mon, 16 Jan 2023 05:08:26 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1673874506; cv=none; d=google.com; s=arc-20160816; b=R9K6YSE7ZOh7aLGYHUatg5JsvwCDjKanSxGZcEyNve69vyhxgJnjWUlTDIE0FjE1cs fPTQw0SDwPIgen1MsVuRnWiZ2eEw/nRa9yVpWTL6pz8jC8CSQ+VSV6VPwpmGnAa+ZPY+ k4shqigMUlupkj2w+MXO5ZupnOQ6mxOe9PkXeZlDz3Xn/NaMQ/o1/8ALvVyy9psXXnnG hM1VunXbJUc1MxngLInFF+dObgXnM4ETAMb9BVyZpnL6ejiA0JiQsKGnSUybVIJmzNS8 789dN971auUq6CyFvYCj+vlWVKw3eRfU4sbXYWVOSsnf8rhHiBkTBxfyZIjLkJcfJams la4A== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from; bh=KP5+xAy7JTO9GkJYbcihQ8Medyg7KjTl8+cd2QqZmgI=; b=EGrk55eJGnTx6HqFWstCNX+jE5ERIFi5NKUZ8HHSh2uU+8BM/zwFLSGRgxEdYYcHoT FGdmG7hJkWLucd8iFlHytEvt0ceCMwmg0NMq4oBncwi+2Iyks8SHuuP2TwO3y+9C+WK2 J353n6xWiHLjk+GuaeLZvLlhx2X19WTVxbXJa00GSz1Lb6Egc2XrFgCOAMiQkFPPs8BA MNTpyDyNSOiq4LIBC1z7yZ8QG+J5wuruTqDBwgWPjIM1XjqzoKTgI5MSXdqz71INKxnk cSIc5K7RgAlihYfFtrWfFc6R4OHGCP7QEZLlSx8zrVBr9q2deUbGnFs+MDzMo283mDi7 BLFQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id hd16-20020a170907969000b007c122a9ba98si28591704ejc.685.2023.01.16.05.08.02; Mon, 16 Jan 2023 05:08:26 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231349AbjAPMzg (ORCPT + 99 others); Mon, 16 Jan 2023 07:55:36 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41238 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231163AbjAPMy4 (ORCPT ); Mon, 16 Jan 2023 07:54:56 -0500 Received: from dggsgout11.his.huawei.com (dggsgout11.his.huawei.com [45.249.212.51]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1673E14EA3; Mon, 16 Jan 2023 04:52:35 -0800 (PST) Received: from mail02.huawei.com (unknown [172.30.67.143]) by dggsgout11.his.huawei.com (SkyGuard) with ESMTP id 4NwX3w0ljVz4f43Lq; Mon, 16 Jan 2023 20:52:28 +0800 (CST) Received: from huaweicloud.com (unknown [10.175.124.27]) by APP2 (Coremail) with SMTP id Syh0CgBH7uuMSMVjYH02Bw--.361S5; Mon, 16 Jan 2023 20:52:30 +0800 (CST) From: Kemeng Shi To: jack@suse.cz, axboe@kernel.dk Cc: kbusch@kernel.org, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, shikemeng@huaweicloud.com Subject: [PATCH v3 3/5] sbitmap: rewrite sbitmap_find_bit_in_index to reduce repeat code Date: Tue, 17 Jan 2023 04:50:57 +0800 Message-Id: <20230116205059.3821738-4-shikemeng@huaweicloud.com> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20230116205059.3821738-1-shikemeng@huaweicloud.com> References: <20230116205059.3821738-1-shikemeng@huaweicloud.com> MIME-Version: 1.0 X-CM-TRANSID: Syh0CgBH7uuMSMVjYH02Bw--.361S5 X-Coremail-Antispam: 1UD129KBjvJXoWxur4kur17WFWUZryDKF1xKrg_yoW5Gr47pF 4rXFy7K398try7uw4qqFy5AFy3Kws5GwnxJFWfW3WruFyUJFn3GrWFgFW3ta4UCFWkZFWD Za1rXr18K3Wjqa7anT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUPqb4IE77IF4wAFF20E14v26rWj6s0DM7CY07I20VC2zVCF04k2 6cxKx2IYs7xG6rWj6s0DM7CIcVAFz4kK6r1j6r18M280x2IEY4vEnII2IxkI6r1a6r45M2 8IrcIa0xkI8VA2jI8067AKxVWUWwA2048vs2IY020Ec7CjxVAFwI0_Gr0_Xr1l8cAvFVAK 0II2c7xJM28CjxkF64kEwVA0rcxSw2x7M28EF7xvwVC0I7IYx2IY67AKxVW7JVWDJwA2z4 x0Y4vE2Ix0cI8IcVCY1x0267AKxVW8Jr0_Cr1UM28EF7xvwVC2z280aVAFwI0_GcCE3s1l 84ACjcxK6I8E87Iv6xkF7I0E14v26rxl6s0DM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I 8CrVACY4xI64kE6c02F40Ex7xfMcIj6xIIjxv20xvE14v26r1j6r18McIj6I8E87Iv67AK xVWUJVW8JwAm72CE4IkC6x0Yz7v_Jr0_Gr1lF7xvr2IYc2Ij64vIr41lF7I21c0EjII2zV CS5cI20VAGYxC7MxAIw28IcxkI7VAKI48JMxC20s026xCaFVCjc4AY6r1j6r4UMI8I3I0E 5I8CrVAFwI0_Jr0_Jr4lx2IqxVCjr7xvwVAFwI0_JrI_JrWlx4CE17CEb7AF67AKxVWUAV WUtwCIc40Y0x0EwIxGrwCI42IY6xIIjxv20xvE14v26r1j6r1xMIIF0xvE2Ix0cI8IcVCY 1x0267AKxVW8JVWxJwCI42IY6xAIw20EY4v20xvaj40_Jr0_JF4lIxAIcVC2z280aVAFwI 0_Gr0_Cr1lIxAIcVC2z280aVCY1x0267AKxVW8Jr0_Cr1UYxBIdaVFxhVjvjDU0xZFpf9x 0pippB7UUUUU= X-CM-SenderInfo: 5vklyvpphqwq5kxd4v5lfo033gof0z/ X-CFilter-Loop: Reflected X-Spam-Status: No, score=0.0 required=5.0 tests=BAYES_00,DATE_IN_FUTURE_06_12, SPF_HELO_NONE,SPF_NONE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1755184634132748214?= X-GMAIL-MSGID: =?utf-8?q?1755184634132748214?= Rewrite sbitmap_find_bit_in_index as following: 1. Rename sbitmap_find_bit_in_index to sbitmap_find_bit_in_word 2. Accept "struct sbitmap_word *" directly instead of accepting "struct sbitmap *" and "int index" to get "struct sbitmap_word *". 3. Accept depth/shallow_depth and wrap for __sbitmap_get_word from caller to support need of both __sbitmap_get_shallow and __sbitmap_get. With helper function sbitmap_find_bit_in_word, we can remove repeat code in __sbitmap_get_shallow to find bit considring deferred clear. Reviewed-by: Jan Kara Signed-off-by: Kemeng Shi --- lib/sbitmap.c | 30 +++++++++++++++--------------- 1 file changed, 15 insertions(+), 15 deletions(-) diff --git a/lib/sbitmap.c b/lib/sbitmap.c index eb45a2d7916e..27cfcc35956e 100644 --- a/lib/sbitmap.c +++ b/lib/sbitmap.c @@ -167,15 +167,16 @@ static int __sbitmap_get_word(unsigned long *word, unsigned long depth, return nr; } -static int sbitmap_find_bit_in_index(struct sbitmap *sb, int index, - unsigned int alloc_hint) +static int sbitmap_find_bit_in_word(struct sbitmap_word *map, + unsigned int depth, + unsigned int alloc_hint, + bool wrap) { - struct sbitmap_word *map = &sb->map[index]; int nr; do { - nr = __sbitmap_get_word(&map->word, __map_depth(sb, index), - alloc_hint, !sb->round_robin); + nr = __sbitmap_get_word(&map->word, depth, + alloc_hint, wrap); if (nr != -1) break; if (!sbitmap_deferred_clear(map)) @@ -203,7 +204,9 @@ static int __sbitmap_get(struct sbitmap *sb, unsigned int alloc_hint) alloc_hint = 0; for (i = 0; i < sb->map_nr; i++) { - nr = sbitmap_find_bit_in_index(sb, index, alloc_hint); + nr = sbitmap_find_bit_in_word(&sb->map[index], + __map_depth(sb, index), + alloc_hint, !sb->round_robin); if (nr != -1) { nr += index << sb->shift; break; @@ -246,20 +249,17 @@ static int __sbitmap_get_shallow(struct sbitmap *sb, alloc_hint = SB_NR_TO_BIT(sb, alloc_hint); for (i = 0; i < sb->map_nr; i++) { -again: - nr = __sbitmap_get_word(&sb->map[index].word, - min_t(unsigned int, - __map_depth(sb, index), - shallow_depth), - alloc_hint, true); + nr = sbitmap_find_bit_in_word(&sb->map[index], + min_t(unsigned int, + __map_depth(sb, index), + shallow_depth), + alloc_hint, true); + if (nr != -1) { nr += index << sb->shift; break; } - if (sbitmap_deferred_clear(&sb->map[index])) - goto again; - /* Jump to next index. */ alloc_hint = 0; if (++index >= sb->map_nr)