From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mike Rapoport Subject: [PATCH 01/21] mm: memblock: replace dereferences of memblock_region.nid with API calls Date: Sun, 12 Apr 2020 22:48:39 +0300 Message-ID: <20200412194859.12663-2-rppt@kernel.org> References: <20200412194859.12663-1-rppt@kernel.org> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Return-path: In-Reply-To: <20200412194859.12663-1-rppt@kernel.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+glpr-linux-riscv=m.gmane-mx.org@lists.infradead.org To: linux-kernel@vger.kernel.org Cc: Rich Felker , linux-ia64@vger.kernel.org, linux-doc@vger.kernel.org, Catalin Marinas , Heiko Carstens , Michal Hocko , "James E.J. Bottomley" , Max Filippov , Guo Ren , linux-csky@vger.kernel.org, linux-parisc@vger.kernel.org, sparclinux@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-riscv@lists.infradead.org, Mike Rapoport , Greg Ungerer , linux-arch@vger.kernel.org, linux-s390@vger.kernel.org, linux-c6x-dev@linux-c6x.org, Baoquan He , Jonathan Corbet , linux-sh@vger.kernel.org, Michael Ellerman , Helge Deller , x86@kernel.org, Russell King , Ley Foon Tan List-Id: linux-arch.vger.kernel.org From: Mike Rapoport There are several places in the code that directly dereference memblock_region.nid despite this field being defined only when CONFIG_HAVE_MEMBLOCK_NODE_MAP=y. Replace these with calls to memblock_get_region_nid() to improve code robustness and to avoid possible breakage when CONFIG_HAVE_MEMBLOCK_NODE_MAP will be removed. Signed-off-by: Mike Rapoport --- arch/arm64/mm/numa.c | 9 ++++++--- arch/x86/mm/numa.c | 6 ++++-- mm/memblock.c | 8 +++++--- mm/page_alloc.c | 4 ++-- 4 files changed, 17 insertions(+), 10 deletions(-) diff --git a/arch/arm64/mm/numa.c b/arch/arm64/mm/numa.c index 4decf1659700..aafcee3e3f7e 100644 --- a/arch/arm64/mm/numa.c +++ b/arch/arm64/mm/numa.c @@ -350,13 +350,16 @@ static int __init numa_register_nodes(void) struct memblock_region *mblk; /* Check that valid nid is set to memblks */ - for_each_memblock(memory, mblk) - if (mblk->nid == NUMA_NO_NODE || mblk->nid >= MAX_NUMNODES) { + for_each_memblock(memory, mblk) { + int mblk_nid = memblock_get_region_node(mblk); + + if (mblk_nid == NUMA_NO_NODE || mblk_nid >= MAX_NUMNODES) { pr_warn("Warning: invalid memblk node %d [mem %#010Lx-%#010Lx]\n", - mblk->nid, mblk->base, + mblk_nid, mblk->base, mblk->base + mblk->size - 1); return -EINVAL; } + } /* Finally register nodes. */ for_each_node_mask(nid, numa_nodes_parsed) { diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c index 59ba008504dc..fe024b2ac796 100644 --- a/arch/x86/mm/numa.c +++ b/arch/x86/mm/numa.c @@ -517,8 +517,10 @@ static void __init numa_clear_kernel_node_hotplug(void) * reserve specific pages for Sandy Bridge graphics. ] */ for_each_memblock(reserved, mb_region) { - if (mb_region->nid != MAX_NUMNODES) - node_set(mb_region->nid, reserved_nodemask); + int nid = memblock_get_region_node(mb_region); + + if (nid != MAX_NUMNODES) + node_set(nid, reserved_nodemask); } /* diff --git a/mm/memblock.c b/mm/memblock.c index c79ba6f9920c..43e2fd3006c1 100644 --- a/mm/memblock.c +++ b/mm/memblock.c @@ -1207,13 +1207,15 @@ void __init_memblock __next_mem_pfn_range(int *idx, int nid, { struct memblock_type *type = &memblock.memory; struct memblock_region *r; + int r_nid; while (++*idx < type->cnt) { r = &type->regions[*idx]; + r_nid = memblock_get_region_node(r); if (PFN_UP(r->base) >= PFN_DOWN(r->base + r->size)) continue; - if (nid == MAX_NUMNODES || nid == r->nid) + if (nid == MAX_NUMNODES || nid == r_nid) break; } if (*idx >= type->cnt) { @@ -1226,7 +1228,7 @@ void __init_memblock __next_mem_pfn_range(int *idx, int nid, if (out_end_pfn) *out_end_pfn = PFN_DOWN(r->base + r->size); if (out_nid) - *out_nid = r->nid; + *out_nid = r_nid; } /** @@ -1810,7 +1812,7 @@ int __init_memblock memblock_search_pfn_nid(unsigned long pfn, *start_pfn = PFN_DOWN(type->regions[mid].base); *end_pfn = PFN_DOWN(type->regions[mid].base + type->regions[mid].size); - return type->regions[mid].nid; + return memblock_get_region_node(&type->regions[mid]); } #endif diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 69827d4fa052..0d012eda1694 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -7208,7 +7208,7 @@ static void __init find_zone_movable_pfns_for_nodes(void) if (!memblock_is_hotpluggable(r)) continue; - nid = r->nid; + nid = memblock_get_region_node(r); usable_startpfn = PFN_DOWN(r->base); zone_movable_pfn[nid] = zone_movable_pfn[nid] ? @@ -7229,7 +7229,7 @@ static void __init find_zone_movable_pfns_for_nodes(void) if (memblock_is_mirror(r)) continue; - nid = r->nid; + nid = memblock_get_region_node(r); usable_startpfn = memblock_region_memory_base_pfn(r); -- 2.25.1