From patchwork Fri Oct 27 02:33:19 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Guoqing Jiang X-Patchwork-Id: 13438061 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 02795C25B6B for ; Fri, 27 Oct 2023 02:33:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345174AbjJ0Cd7 (ORCPT ); Thu, 26 Oct 2023 22:33:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37058 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1345175AbjJ0Cd6 (ORCPT ); Thu, 26 Oct 2023 22:33:58 -0400 Received: from out-171.mta1.migadu.com (out-171.mta1.migadu.com [IPv6:2001:41d0:203:375::ab]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D8E119D for ; Thu, 26 Oct 2023 19:33:55 -0700 (PDT) X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1698374034; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=ovgXxy/ML0BWla1vuZb25JRttuC95QIdQTgtm/CHEBs=; b=VPnRycKSAd2o+WW1gVc6tcZ2/ZIizyIKyUOlFuATA+0goDqoCtdxgnXoaek0JUyB1AvtoZ u8Qm/uH74nhGRKnaVTM2//0QU7opEi4VvtLvXAvg3dDqDIsZ8hI9WSePqf0tY0fOSvPOh3 DUM0O3qePp2Sdmo+eOC5APp336GAZ4o= From: Guoqing Jiang To: bmt@zurich.ibm.com, jgg@ziepe.ca, leon@kernel.org Cc: linux-rdma@vger.kernel.org Subject: [PATCH V3 09/18] RDMA/siw: Introduce SIW_STAG_MAX_INDEX Date: Fri, 27 Oct 2023 10:33:19 +0800 Message-Id: <20231027023328.30347-10-guoqing.jiang@linux.dev> In-Reply-To: <20231027023328.30347-1-guoqing.jiang@linux.dev> References: <20231027023328.30347-1-guoqing.jiang@linux.dev> MIME-Version: 1.0 X-Migadu-Flow: FLOW_OUT Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org Add the macro to remove magic number in the code. Acked-by: Bernard Metzler Signed-off-by: Guoqing Jiang --- drivers/infiniband/sw/siw/siw_mem.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/drivers/infiniband/sw/siw/siw_mem.c b/drivers/infiniband/sw/siw/siw_mem.c index 92c5776a9eed..ac4502fb0a96 100644 --- a/drivers/infiniband/sw/siw/siw_mem.c +++ b/drivers/infiniband/sw/siw/siw_mem.c @@ -13,18 +13,20 @@ #include "siw.h" #include "siw_mem.h" +/* Stag lookup is based on its index part only (24 bits). */ +#define SIW_STAG_MAX_INDEX 0x00ffffff + /* - * Stag lookup is based on its index part only (24 bits). * The code avoids special Stag of zero and tries to randomize * STag values between 1 and SIW_STAG_MAX_INDEX. */ int siw_mem_add(struct siw_device *sdev, struct siw_mem *m) { - struct xa_limit limit = XA_LIMIT(1, 0x00ffffff); + struct xa_limit limit = XA_LIMIT(1, SIW_STAG_MAX_INDEX); u32 id, next; get_random_bytes(&next, 4); - next &= 0x00ffffff; + next &= SIW_STAG_MAX_INDEX; if (xa_alloc_cyclic(&sdev->mem_xa, &id, m, limit, &next, GFP_KERNEL) < 0) @@ -91,7 +93,7 @@ int siw_mr_add_mem(struct siw_mr *mr, struct ib_pd *pd, void *mem_obj, { struct siw_device *sdev = to_siw_dev(pd->device); struct siw_mem *mem = kzalloc(sizeof(*mem), GFP_KERNEL); - struct xa_limit limit = XA_LIMIT(1, 0x00ffffff); + struct xa_limit limit = XA_LIMIT(1, SIW_STAG_MAX_INDEX); u32 id, next; if (!mem) @@ -107,7 +109,7 @@ int siw_mr_add_mem(struct siw_mr *mr, struct ib_pd *pd, void *mem_obj, kref_init(&mem->ref); get_random_bytes(&next, 4); - next &= 0x00ffffff; + next &= SIW_STAG_MAX_INDEX; if (xa_alloc_cyclic(&sdev->mem_xa, &id, mem, limit, &next, GFP_KERNEL) < 0) {