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=-12.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 442B9C0650E for ; Thu, 4 Jul 2019 05:54:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0B995218AD for ; Thu, 4 Jul 2019 05:54:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1562219678; bh=lpL9qYe0RO88wdEgU9YQEHIZJOwABejFZDyUmJs4itY=; h=Subject:To:From:Date:List-ID:From; b=gwHDjzrQc02Y2kKX+tLAPBF9fFCE6tsGUBY3WNXaLg7fwvK4GodQBFPCqnIxGTjbc BQsJZ4uSfHa5H+c+AfL64WFij7QaExAihWLHn8pdGWzu/e7kx+pTkJMWy1vI+OJ0aj FqxjpLFlMO5YERIJQSNBNRq9tTkGAboMLw/SlomE= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725917AbfGDFyh (ORCPT ); Thu, 4 Jul 2019 01:54:37 -0400 Received: from mail.kernel.org ([198.145.29.99]:56328 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725879AbfGDFyh (ORCPT ); Thu, 4 Jul 2019 01:54:37 -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 7201A218A4; Thu, 4 Jul 2019 05:54:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1562219676; bh=lpL9qYe0RO88wdEgU9YQEHIZJOwABejFZDyUmJs4itY=; h=Subject:To:From:Date:From; b=XQsqacfbRBgwQ9DxwvprBgZz+qBnnQP0PLnXJmeTgDlnnq8mjiiCd/nx1j6UGwEuM dq0wB7tpmO1dyp+YGUIK3ToqXX3NE7zs7B7tk/Bgsbe+F96fFEmoLpggnjtCqaXvmz nrHlGiBMjY0Ris3zQ7bOGwRn4xJvOBjX32ju31FY= Subject: patch "intel_th: msu: Fix unused variable warning on arm64 platform" added to char-misc-next To: zhangshaokun@hisilicon.com, alexander.shishkin@linux.intel.com, andriy.shevchenko@linux.intel.com, gregkh@linuxfoundation.org, stable@vger.kernel.org From: Date: Thu, 04 Jul 2019 07:52:13 +0200 Message-ID: <1562219533255243@kroah.com> 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 This is a note to let you know that I've just added the patch titled intel_th: msu: Fix unused variable warning on arm64 platform to my char-misc git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git in the char-misc-next branch. The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.) The patch will also be merged in the next major kernel release during the merge window. If you have any questions about this process, please let me know. >From b96fb368b08f1637cbf780a6b83e36c2c5ed4ff5 Mon Sep 17 00:00:00 2001 From: Shaokun Zhang Date: Fri, 21 Jun 2019 19:19:27 +0300 Subject: intel_th: msu: Fix unused variable warning on arm64 platform MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Commit ba39bd8306057 ("intel_th: msu: Switch over to scatterlist") introduced the following warnings on non-x86 architectures, as a result of reordering the multi mode buffer allocation sequence: > drivers/hwtracing/intel_th/msu.c: In function ‘msc_buffer_win_alloc’: > drivers/hwtracing/intel_th/msu.c:783:21: warning: unused variable ‘i’ > [-Wunused-variable] > int ret = -ENOMEM, i; > ^ > drivers/hwtracing/intel_th/msu.c: In function ‘msc_buffer_win_free’: > drivers/hwtracing/intel_th/msu.c:863:6: warning: unused variable ‘i’ > [-Wunused-variable] > int i; > ^ Fix this compiler warning by factoring out set_memory sequences and making them x86-only. Suggested-by: Alexander Shishkin Signed-off-by: Shaokun Zhang Fixes: ba39bd8306057 ("intel_th: msu: Switch over to scatterlist") Reviewed-by: Andy Shevchenko Signed-off-by: Alexander Shishkin Cc: stable Link: https://lore.kernel.org/r/20190621161930.60785-2-alexander.shishkin@linux.intel.com Signed-off-by: Greg Kroah-Hartman --- drivers/hwtracing/intel_th/msu.c | 40 +++++++++++++++++++++----------- 1 file changed, 27 insertions(+), 13 deletions(-) diff --git a/drivers/hwtracing/intel_th/msu.c b/drivers/hwtracing/intel_th/msu.c index 81bb54fa3ce8..8c568b5c8920 100644 --- a/drivers/hwtracing/intel_th/msu.c +++ b/drivers/hwtracing/intel_th/msu.c @@ -767,6 +767,30 @@ static int __msc_buffer_win_alloc(struct msc_window *win, return -ENOMEM; } +#ifdef CONFIG_X86 +static void msc_buffer_set_uc(struct msc_window *win, unsigned int nr_blocks) +{ + int i; + + for (i = 0; i < nr_blocks; i++) + /* Set the page as uncached */ + set_memory_uc((unsigned long)msc_win_block(win, i), 1); +} + +static void msc_buffer_set_wb(struct msc_window *win) +{ + int i; + + for (i = 0; i < win->nr_blocks; i++) + /* Reset the page to write-back */ + set_memory_wb((unsigned long)msc_win_block(win, i), 1); +} +#else /* !X86 */ +static inline void +msc_buffer_set_uc(struct msc_window *win, unsigned int nr_blocks) {} +static inline void msc_buffer_set_wb(struct msc_window *win) {} +#endif /* CONFIG_X86 */ + /** * msc_buffer_win_alloc() - alloc a window for a multiblock mode * @msc: MSC device @@ -780,7 +804,7 @@ static int __msc_buffer_win_alloc(struct msc_window *win, static int msc_buffer_win_alloc(struct msc *msc, unsigned int nr_blocks) { struct msc_window *win; - int ret = -ENOMEM, i; + int ret = -ENOMEM; if (!nr_blocks) return 0; @@ -811,11 +835,7 @@ static int msc_buffer_win_alloc(struct msc *msc, unsigned int nr_blocks) if (ret < 0) goto err_nomem; -#ifdef CONFIG_X86 - for (i = 0; i < ret; i++) - /* Set the page as uncached */ - set_memory_uc((unsigned long)msc_win_block(win, i), 1); -#endif + msc_buffer_set_uc(win, ret); win->nr_blocks = ret; @@ -860,8 +880,6 @@ static void __msc_buffer_win_free(struct msc *msc, struct msc_window *win) */ static void msc_buffer_win_free(struct msc *msc, struct msc_window *win) { - int i; - msc->nr_pages -= win->nr_blocks; list_del(&win->entry); @@ -870,11 +888,7 @@ static void msc_buffer_win_free(struct msc *msc, struct msc_window *win) msc->base_addr = 0; } -#ifdef CONFIG_X86 - for (i = 0; i < win->nr_blocks; i++) - /* Reset the page to write-back */ - set_memory_wb((unsigned long)msc_win_block(win, i), 1); -#endif + msc_buffer_set_wb(win); __msc_buffer_win_free(msc, win); -- 2.22.0