From patchwork Sun Aug 2 16:35:54 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Rapoport X-Patchwork-Id: 11696669 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 37CBF138C for ; Sun, 2 Aug 2020 16:38:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1B9A72086A for ; Sun, 2 Aug 2020 16:38:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1596386287; bh=qDntWqnQ5jpHhG3A/60QVRrBP5EMvBab0IZaynQoM2g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=1yAohYCOcL5Bxd+fGA5useA+vN3b8yHWJuuLtzFP7cmgGLhy1gLxAX7XeylQE42n+ 5Udmk8h60BiBZ4BnDAwg11i4WinyO11bujXcOwVHHo6sErhwDYy7I3IrOr19JcBNBF zoU4BxK+jNEYa28zaxicaLagh17JgV8o1m6t1OU0= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726996AbgHBQiG (ORCPT ); Sun, 2 Aug 2020 12:38:06 -0400 Received: from mail.kernel.org ([198.145.29.99]:47700 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725768AbgHBQiG (ORCPT ); Sun, 2 Aug 2020 12:38:06 -0400 Received: from aquarius.haifa.ibm.com (nesher1.haifa.il.ibm.com [195.110.40.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id C503520829; Sun, 2 Aug 2020 16:37:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1596386285; bh=qDntWqnQ5jpHhG3A/60QVRrBP5EMvBab0IZaynQoM2g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=VSqQxV0OVL//R9DhPiibLmE2kXWGrWU92k3aLM7c66ewV2IazxdsH1sADuEpZ2VZu 0S5heSg+nTY4JZlymnVN7f4/vGxsZ5aZ1upCNa2dEDeJR9bmfCNoyj1zojZiYdqR+y UBfasxjVHbnoQAcZgMQgcj9QUMcziaSHu+D1YTts= From: Mike Rapoport To: Andrew Morton Cc: Andy Lutomirski , Baoquan He , Benjamin Herrenschmidt , Borislav Petkov , Catalin Marinas , Christoph Hellwig , Dave Hansen , Emil Renner Berthing , Ingo Molnar , Hari Bathini , Marek Szyprowski , Max Filippov , Michael Ellerman , Michal Simek , Mike Rapoport , Mike Rapoport , Palmer Dabbelt , Paul Mackerras , Paul Walmsley , Peter Zijlstra , Russell King , Stafford Horne , Thomas Gleixner , Will Deacon , Yoshinori Sato , clang-built-linux@googlegroups.com, iommu@lists.linux-foundation.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-c6x-dev@linux-c6x.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, linux-mm@kvack.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, linux-xtensa@linux-xtensa.org, linuxppc-dev@lists.ozlabs.org, openrisc@lists.librecores.org, sparclinux@vger.kernel.org, uclinux-h8-devel@lists.sourceforge.jp, x86@kernel.org Subject: [PATCH v2 10/17] memblock: reduce number of parameters in for_each_mem_range() Date: Sun, 2 Aug 2020 19:35:54 +0300 Message-Id: <20200802163601.8189-11-rppt@kernel.org> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200802163601.8189-1-rppt@kernel.org> References: <20200802163601.8189-1-rppt@kernel.org> MIME-Version: 1.0 Sender: linux-sh-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org From: Mike Rapoport Currently for_each_mem_range() iterator is the most generic way to traverse memblock regions. As such, it has 8 parameters and it is hardly convenient to users. Most users choose to utilize one of its wrappers and the only user that actually needs most of the parameters outside memblock is s390 crash dump implementation. To avoid yet another naming for memblock iterators, rename the existing for_each_mem_range() to __for_each_mem_range() and add a new for_each_mem_range() wrapper with only index, start and end parameters. The new wrapper nicely fits into init_unavailable_mem() and will be used in upcoming changes to simplify memblock traversals. Signed-off-by: Mike Rapoport Reviewed-by: Baoquan He --- .clang-format | 1 + arch/arm64/kernel/machine_kexec_file.c | 6 ++---- arch/s390/kernel/crash_dump.c | 8 ++++---- include/linux/memblock.h | 18 ++++++++++++++---- mm/page_alloc.c | 3 +-- 5 files changed, 22 insertions(+), 14 deletions(-) diff --git a/.clang-format b/.clang-format index a0a96088c74f..52ededab25ce 100644 --- a/.clang-format +++ b/.clang-format @@ -205,6 +205,7 @@ ForEachMacros: - 'for_each_memblock_type' - 'for_each_memcg_cache_index' - 'for_each_mem_pfn_range' + - '__for_each_mem_range' - 'for_each_mem_range' - 'for_each_mem_range_rev' - 'for_each_migratetype_order' diff --git a/arch/arm64/kernel/machine_kexec_file.c b/arch/arm64/kernel/machine_kexec_file.c index 361a1143e09e..5b0e67b93cdc 100644 --- a/arch/arm64/kernel/machine_kexec_file.c +++ b/arch/arm64/kernel/machine_kexec_file.c @@ -215,8 +215,7 @@ static int prepare_elf_headers(void **addr, unsigned long *sz) phys_addr_t start, end; nr_ranges = 1; /* for exclusion of crashkernel region */ - for_each_mem_range(i, &memblock.memory, NULL, NUMA_NO_NODE, - MEMBLOCK_NONE, &start, &end, NULL) + for_each_mem_range(i, &start, &end) nr_ranges++; cmem = kmalloc(struct_size(cmem, ranges, nr_ranges), GFP_KERNEL); @@ -225,8 +224,7 @@ static int prepare_elf_headers(void **addr, unsigned long *sz) cmem->max_nr_ranges = nr_ranges; cmem->nr_ranges = 0; - for_each_mem_range(i, &memblock.memory, NULL, NUMA_NO_NODE, - MEMBLOCK_NONE, &start, &end, NULL) { + for_each_mem_range(i, &start, &end) { cmem->ranges[cmem->nr_ranges].start = start; cmem->ranges[cmem->nr_ranges].end = end - 1; cmem->nr_ranges++; diff --git a/arch/s390/kernel/crash_dump.c b/arch/s390/kernel/crash_dump.c index f96a5857bbfd..e28085c725ff 100644 --- a/arch/s390/kernel/crash_dump.c +++ b/arch/s390/kernel/crash_dump.c @@ -549,8 +549,8 @@ static int get_mem_chunk_cnt(void) int cnt = 0; u64 idx; - for_each_mem_range(idx, &memblock.physmem, &oldmem_type, NUMA_NO_NODE, - MEMBLOCK_NONE, NULL, NULL, NULL) + __for_each_mem_range(idx, &memblock.physmem, &oldmem_type, NUMA_NO_NODE, + MEMBLOCK_NONE, NULL, NULL, NULL) cnt++; return cnt; } @@ -563,8 +563,8 @@ static void loads_init(Elf64_Phdr *phdr, u64 loads_offset) phys_addr_t start, end; u64 idx; - for_each_mem_range(idx, &memblock.physmem, &oldmem_type, NUMA_NO_NODE, - MEMBLOCK_NONE, &start, &end, NULL) { + __for_each_mem_range(idx, &memblock.physmem, &oldmem_type, NUMA_NO_NODE, + MEMBLOCK_NONE, &start, &end, NULL) { phdr->p_filesz = end - start; phdr->p_type = PT_LOAD; phdr->p_offset = start; diff --git a/include/linux/memblock.h b/include/linux/memblock.h index e6a23b3db696..d70c2835e913 100644 --- a/include/linux/memblock.h +++ b/include/linux/memblock.h @@ -142,7 +142,7 @@ void __next_reserved_mem_region(u64 *idx, phys_addr_t *out_start, void __memblock_free_late(phys_addr_t base, phys_addr_t size); /** - * for_each_mem_range - iterate through memblock areas from type_a and not + * __for_each_mem_range - iterate through memblock areas from type_a and not * included in type_b. Or just type_a if type_b is NULL. * @i: u64 used as loop variable * @type_a: ptr to memblock_type to iterate @@ -153,7 +153,7 @@ void __memblock_free_late(phys_addr_t base, phys_addr_t size); * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL * @p_nid: ptr to int for nid of the range, can be %NULL */ -#define for_each_mem_range(i, type_a, type_b, nid, flags, \ +#define __for_each_mem_range(i, type_a, type_b, nid, flags, \ p_start, p_end, p_nid) \ for (i = 0, __next_mem_range(&i, nid, flags, type_a, type_b, \ p_start, p_end, p_nid); \ @@ -182,6 +182,16 @@ void __memblock_free_late(phys_addr_t base, phys_addr_t size); __next_mem_range_rev(&i, nid, flags, type_a, type_b, \ p_start, p_end, p_nid)) +/** + * for_each_mem_range - iterate through memory areas. + * @i: u64 used as loop variable + * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL + * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL + */ +#define for_each_mem_range(i, p_start, p_end) \ + __for_each_mem_range(i, &memblock.memory, NULL, NUMA_NO_NODE, \ + MEMBLOCK_NONE, p_start, p_end, NULL) + /** * for_each_reserved_mem_region - iterate over all reserved memblock areas * @i: u64 used as loop variable @@ -287,8 +297,8 @@ int __init deferred_page_init_max_threads(const struct cpumask *node_cpumask); * soon as memblock is initialized. */ #define for_each_free_mem_range(i, nid, flags, p_start, p_end, p_nid) \ - for_each_mem_range(i, &memblock.memory, &memblock.reserved, \ - nid, flags, p_start, p_end, p_nid) + __for_each_mem_range(i, &memblock.memory, &memblock.reserved, \ + nid, flags, p_start, p_end, p_nid) /** * for_each_free_mem_range_reverse - rev-iterate through free memblock areas diff --git a/mm/page_alloc.c b/mm/page_alloc.c index e028b87ce294..95af111d69d3 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -6972,8 +6972,7 @@ static void __init init_unavailable_mem(void) * Loop through unavailable ranges not covered by memblock.memory. */ pgcnt = 0; - for_each_mem_range(i, &memblock.memory, NULL, - NUMA_NO_NODE, MEMBLOCK_NONE, &start, &end, NULL) { + for_each_mem_range(i, &start, &end) { if (next < start) pgcnt += init_unavailable_range(PFN_DOWN(next), PFN_UP(start));