linux-kernel - linux-next: manual merge of the akpm-current tree with the arm64 tree

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Date:   Thu, 16 Jul 2020 18:00:12 +1000
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Andrew Morton <akpm@...ux-foundation.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>
Cc:     Linux Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Anshuman Khandual <anshuman.khandual@....com>,
        Barry Song <song.bao.hua@...ilicon.com>
Subject: linux-next: manual merge of the akpm-current tree with the arm64
 tree

Hi all,

Today's linux-next merge of the akpm-current tree got a conflict in:

  arch/arm64/mm/init.c

between commit:

  abb7962adc80 ("arm64/hugetlb: Reserve CMA areas for gigantic pages on 16K and 64K configs")

from the arm64 tree and commit:

  10d44973d8ab ("mm/hugetlb: split hugetlb_cma in nodes with memory")

from the akpm-current tree.

I fixed it up (see below) and can carry the fix as necessary. This
is now fixed as far as linux-next is concerned, but any non trivial
conflicts should be mentioned to your upstream maintainer when your tree
is submitted for merging.  You may also want to consider cooperating
with the maintainer of the conflicting tree to minimise any particularly
complex conflicts.

-- 
Cheers,
Stephen Rothwell

diff --cc arch/arm64/mm/init.c
index f8c19c6c8e71,ee551d71c4dd..000000000000
--- a/arch/arm64/mm/init.c
+++ b/arch/arm64/mm/init.c
@@@ -421,22 -421,21 +421,21 @@@ void __init bootmem_init(void
  	arm64_numa_init();
  
  	/*
- 	 * must be done after arm64_numa_init() which calls numa_init() to
- 	 * initialize node_online_map that gets used in hugetlb_cma_reserve()
- 	 * while allocating required CMA size across online nodes.
+ 	 * sparse_init() tries to allocate memory from memblock, so must be
+ 	 * done after the fixed reservations
  	 */
- #if defined(CONFIG_HUGETLB_PAGE) && defined(CONFIG_CMA)
- 	arm64_hugetlb_cma_reserve();
- #endif
+ 	sparse_init();
+ 	zone_sizes_init(min, max);
  
  	/*
- 	 * Sparsemem tries to allocate bootmem in memory_present(), so must be
- 	 * done after the fixed reservations.
+ 	 * must be done after zone_sizes_init() which calls free_area_init()
+ 	 * that calls node_set_state() to initialize node_states[N_MEMORY]
+ 	 * because hugetlb_cma_reserve() will scan over nodes with N_MEMORY
+ 	 * state
  	 */
- 	memblocks_present();
- 
- 	sparse_init();
- 	zone_sizes_init(min, max);
 -#ifdef CONFIG_ARM64_4K_PAGES
 -	hugetlb_cma_reserve(PUD_SHIFT - PAGE_SHIFT);
++#if defined(CONFIG_HUGETLB_PAGE) && defined(CONFIG_CMA)
++	arm64_hugetlb_cma_reserve();
+ #endif
  
  	memblock_dump_all();
  }

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