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 X-Spam-Level: X-Spam-Status: No, score=-6.0 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,T_DKIMWL_WL_HIGH,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7D7D1C282DE for ; Thu, 23 May 2019 19:34:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 538E620879 for ; Thu, 23 May 2019 19:34:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1558640057; bh=LBVCXhgVU49YHaR9Ev/F2JhIioCYtg0jVSYC9JHnQbs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=iv+39BWjlRSOcl6wZOPwz2Kv4FgnXdMf1HLTpqDsAYjXBb9Y15ULcWzIb7AdvjV00 Yv/hPHH5CRoK6GIbSaVfZ5xnwhkMKqeJMpJtOla2o7bVaoT8pfCiY1bUtxC+5uw2Mo TohQRWmguyYVaO2zIxE+1mI3rhAV6RI1J3GPdS/A= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390704AbfEWT2C (ORCPT ); Thu, 23 May 2019 15:28:02 -0400 Received: from mail.kernel.org ([198.145.29.99]:40452 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2391002AbfEWT2B (ORCPT ); Thu, 23 May 2019 15:28:01 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 3ECB72054F; Thu, 23 May 2019 19:28:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1558639680; bh=LBVCXhgVU49YHaR9Ev/F2JhIioCYtg0jVSYC9JHnQbs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=m3lRRI6RlHj60DY/8tMJ7r5MWVoMx8a0sVyCDgylv0o0zCe6KMk2WU6GQ0gxrYLkz BbF3avJg7RYJPOdmleNdzTqqX1jIQuwasx1ic8nmKiiC9n9WvAuXUaOM2IOW0XbcXc l18O8cQZN0OQXvlWELIwrOwtMeuO4LLf+pRgWH+g= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Jason Gunthorpe , Haggai Eran , Leon Romanovsky Subject: [PATCH 5.1 055/122] RDMA/mlx5: Use get_zeroed_page() for clock_info Date: Thu, 23 May 2019 21:06:17 +0200 Message-Id: <20190523181712.012640350@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190523181705.091418060@linuxfoundation.org> References: <20190523181705.091418060@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Jason Gunthorpe commit ddcdc368b1033e19fd3a5f750752e10e28a87826 upstream. get_zeroed_page() returns a virtual address for the page which is better than allocating a struct page and doing a permanent kmap on it. Cc: stable@vger.kernel.org Signed-off-by: Jason Gunthorpe Reviewed-by: Haggai Eran Signed-off-by: Leon Romanovsky Signed-off-by: Jason Gunthorpe Signed-off-by: Greg Kroah-Hartman --- drivers/infiniband/hw/mlx5/main.c | 5 ++- drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c | 30 +++++++------------- include/linux/mlx5/driver.h | 1 3 files changed, 14 insertions(+), 22 deletions(-) --- a/drivers/infiniband/hw/mlx5/main.c +++ b/drivers/infiniband/hw/mlx5/main.c @@ -2070,11 +2070,12 @@ static int mlx5_ib_mmap_clock_info_page( return -EPERM; vma->vm_flags &= ~VM_MAYWRITE; - if (!dev->mdev->clock_info_page) + if (!dev->mdev->clock_info) return -EOPNOTSUPP; return rdma_user_mmap_page(&context->ibucontext, vma, - dev->mdev->clock_info_page, PAGE_SIZE); + virt_to_page(dev->mdev->clock_info), + PAGE_SIZE); } static int uar_mmap(struct mlx5_ib_dev *dev, enum mlx5_ib_mmap_cmd cmd, --- a/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c @@ -535,23 +535,16 @@ void mlx5_init_clock(struct mlx5_core_de do_div(ns, NSEC_PER_SEC / HZ); clock->overflow_period = ns; - mdev->clock_info_page = alloc_page(GFP_KERNEL); - if (mdev->clock_info_page) { - mdev->clock_info = kmap(mdev->clock_info_page); - if (!mdev->clock_info) { - __free_page(mdev->clock_info_page); - mlx5_core_warn(mdev, "failed to map clock page\n"); - } else { - mdev->clock_info->sign = 0; - mdev->clock_info->nsec = clock->tc.nsec; - mdev->clock_info->cycles = clock->tc.cycle_last; - mdev->clock_info->mask = clock->cycles.mask; - mdev->clock_info->mult = clock->nominal_c_mult; - mdev->clock_info->shift = clock->cycles.shift; - mdev->clock_info->frac = clock->tc.frac; - mdev->clock_info->overflow_period = - clock->overflow_period; - } + mdev->clock_info = + (struct mlx5_ib_clock_info *)get_zeroed_page(GFP_KERNEL); + if (mdev->clock_info) { + mdev->clock_info->nsec = clock->tc.nsec; + mdev->clock_info->cycles = clock->tc.cycle_last; + mdev->clock_info->mask = clock->cycles.mask; + mdev->clock_info->mult = clock->nominal_c_mult; + mdev->clock_info->shift = clock->cycles.shift; + mdev->clock_info->frac = clock->tc.frac; + mdev->clock_info->overflow_period = clock->overflow_period; } INIT_WORK(&clock->pps_info.out_work, mlx5_pps_out); @@ -599,8 +592,7 @@ void mlx5_cleanup_clock(struct mlx5_core cancel_delayed_work_sync(&clock->overflow_work); if (mdev->clock_info) { - kunmap(mdev->clock_info_page); - __free_page(mdev->clock_info_page); + free_page((unsigned long)mdev->clock_info); mdev->clock_info = NULL; } --- a/include/linux/mlx5/driver.h +++ b/include/linux/mlx5/driver.h @@ -681,7 +681,6 @@ struct mlx5_core_dev { #endif struct mlx5_clock clock; struct mlx5_ib_clock_info *clock_info; - struct page *clock_info_page; struct mlx5_fw_tracer *tracer; };