From mboxrd@z Thu Jan 1 00:00:00 1970 From: Anshuman Khandual Subject: Re: [PATCH] mm: Replace all open encodings for NUMA_NO_NODE Date: Sat, 24 Nov 2018 16:43:15 +0530 Message-ID: <8e16e9d1-8f64-d2ca-7d06-985ce601f75b@arm.com> References: <1542966856-12619-1-git-send-email-anshuman.khandual@arm.com> <20181123154415.42898a42e28a31488749738a@linux-foundation.org> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, ocfs2-devel@oss.oracle.com, linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org, netdev@vger.kernel.org, intel-wired-lan@lists.osuosl.org, linux-media@vger.kernel.org, iommu@lists.linux-foundation.org, linux-rdma@vger.kernel.org, dmaengine@vger.kernel.org, linux-block@vger.kernel.org, sparclinux@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-ia64@vger.kernel.org, linux-alpha@vger.kernel.org, jiangqi903@gmail.com, hverkuil@xs4all.nl To: Andrew Morton Return-path: In-Reply-To: <20181123154415.42898a42e28a31488749738a@linux-foundation.org> Content-Language: en-US Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org On 11/24/2018 05:14 AM, Andrew Morton wrote: > On Fri, 23 Nov 2018 15:24:16 +0530 Anshuman Khandual wrote: > >> At present there are multiple places where invalid node number is encoded >> as -1. Even though implicitly understood it is always better to have macros >> in there. Replace these open encodings for an invalid node number with the >> global macro NUMA_NO_NODE. This helps remove NUMA related assumptions like >> 'invalid node' from various places redirecting them to a common definition. >> >> ... >> >> Build tested this with multiple cross compiler options like alpha, sparc, >> arm64, x86, powerpc, powerpc64le etc with their default config which might >> not have compiled tested all driver related changes. I will appreciate >> folks giving this a test in their respective build environment. >> >> All these places for replacement were found by running the following grep >> patterns on the entire kernel code. Please let me know if this might have >> missed some instances. This might also have replaced some false positives. >> I will appreciate suggestions, inputs and review. >> >> 1. git grep "nid == -1" >> 2. git grep "node == -1" >> 3. git grep "nid = -1" >> 4. git grep "node = -1" > > The build testing is good, but I worry that some of the affected files > don't clearly have numa.h in their include paths, for the NUMA_NO_NODE > definition. > > The first thing I looked it is arch/powerpc/include/asm/pci-bridge.h. > Maybe it somehow manages to include numa.h via some nested include, but > if so, is that reliable across all config combinations and as code > evolves? > > So I think that the patch should have added an explicit include of > numa.h, especially in cases where the affected file previously had no > references to any of the things which numa.h defines. Fair enough. Will include numa.h in those particular files.