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 1F151C433F5 for ; Wed, 15 Dec 2021 11:19:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242076AbhLOLTP (ORCPT ); Wed, 15 Dec 2021 06:19:15 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34744 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242035AbhLOLTD (ORCPT ); Wed, 15 Dec 2021 06:19:03 -0500 Received: from mail-lj1-x22e.google.com (mail-lj1-x22e.google.com [IPv6:2a00:1450:4864:20::22e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B0C6EC06173F; Wed, 15 Dec 2021 03:19:02 -0800 (PST) Received: by mail-lj1-x22e.google.com with SMTP id l7so32810390lja.2; Wed, 15 Dec 2021 03:19:02 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=J+iHO/SIeyGqNyQAEiJgdx7jAWs0ko1xH4TyQey/PuM=; b=qB193CP6wWLHcjEQZXm5STxeoKgeaTkm/g3xMIKpLqsLe/iNxMNVJP27KxDAb1jK1C jkAoJS9yir8YwYdzllryf27OezSLCqH2dcWWXuErTHz5cLvEcUQKlWmhgMprgU0bx8Ux tyhf1wpn9KyQC8mzJvajfbG+uWs41tAz9lJgFe8RhKXzMm5hri9QM9JGVpdVQ7wUTU/G 9PEdxbP/mrYNrHYFY07CYuj02fu6BffqGJU5PT+xXX6FoY93eQxEGAcJIkSXaK9B7Ux0 4HH8k0Nzx0HezuyEpsW2ui2qM1Iq/UewPRrxS9tNqObAyJmaZ8H8m3ENpF8WRRspwcZi J8JA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=J+iHO/SIeyGqNyQAEiJgdx7jAWs0ko1xH4TyQey/PuM=; b=2n6m6RvNnObp0uUP+FTMTIniMLqcwgeb1YWPuhsfJDjS6SJrAG9/L/9j8vFNEZqSZd r3tkClaS6Qaz1y1ulJKekIyomzyFUM3gn08wnjuTASUjWmJ/SNvMCjUnFNMQ7eOSoUjx 5YqRQEGz7pxLB90HyDBpK9Q8537jC2ZToGX+TwVrdizbJvHsQXeLgUEcut6Buxpe1w9f ZhdZfMSc5QGbeBuPZVSD4k06NsPzO7/5bI1PjfcgXa9idO7sbjhSLyYPvIPrONGSsIgN ESkjd+9LhUVND6vc0WtB3iarzBzmn6TWpOZHHeXDO4COF4ZGg3isn9E/bWbnGtjTL5UV NPXg== X-Gm-Message-State: AOAM5315qYinz3CVXyxWp9100XBfNAAfsxIpv7n1C5X47bn6v9rbhUyf YhGgbS1ci+VD0bcif001qGeLYYT/wADGgDpd X-Google-Smtp-Source: ABdhPJzMT2JnUXhil69q/L9rLP+kO1nBtTqzWyX/s4NjqWrgk0PQP7eMgCUb2MRivdv5QTva/NQKBQ== X-Received: by 2002:a05:651c:2119:: with SMTP id a25mr9712582ljq.131.1639567141054; Wed, 15 Dec 2021 03:19:01 -0800 (PST) Received: from pc638.lan (h5ef52e3d.seluork.dyn.perspektivbredband.net. [94.245.46.61]) by smtp.gmail.com with ESMTPSA id n17sm383906ljg.128.2021.12.15.03.19.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 15 Dec 2021 03:19:00 -0800 (PST) From: "Uladzislau Rezki (Sony)" To: LKML , RCU , "Paul E . McKenney" Cc: Michal Hocko , Andrew Morton , Daniel Axtens , Frederic Weisbecker , Neeraj Upadhyay , Joel Fernandes , Peter Zijlstra , Thomas Gleixner , "Theodore Y . Ts'o" , Sebastian Andrzej Siewior , Uladzislau Rezki , Oleksiy Avramchenko , Mike Marciniszyn Subject: [PATCH] RDMA/hfi1: Switch to kvfree_rcu() API Date: Wed, 15 Dec 2021 12:18:44 +0100 Message-Id: <20211215111845.2514-8-urezki@gmail.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20211215111845.2514-1-urezki@gmail.com> References: <20211215111845.2514-1-urezki@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Instead of invoking a synchronize_rcu() to free a pointer after a grace period we can directly make use of new API that does the same but in more efficient way. TO: linux-rdma@vger.kernel.org TO: Jason Gunthorpe TO: Mike Marciniszyn Acked-by: Mike Marciniszyn Signed-off-by: Uladzislau Rezki (Sony) --- drivers/infiniband/hw/hfi1/sdma.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/infiniband/hw/hfi1/sdma.c b/drivers/infiniband/hw/hfi1/sdma.c index f07d328689d3..7264a35e8f4c 100644 --- a/drivers/infiniband/hw/hfi1/sdma.c +++ b/drivers/infiniband/hw/hfi1/sdma.c @@ -1292,8 +1292,7 @@ void sdma_clean(struct hfi1_devdata *dd, size_t num_engines) sdma_map_free(rcu_access_pointer(dd->sdma_map)); RCU_INIT_POINTER(dd->sdma_map, NULL); spin_unlock_irq(&dd->sde_map_lock); - synchronize_rcu(); - kfree(dd->per_sdma); + kvfree_rcu(dd->per_sdma); dd->per_sdma = NULL; if (dd->sdma_rht) { -- 2.30.2