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From:   Muchun Song <songmuchun@bytedance.com>
To:     mike.kravetz@oracle.com, akpm@linux-foundation.org,
        osalvador@suse.de, mhocko@suse.com, song.bao.hua@hisilicon.com,
        david@redhat.com, chenhuang5@huawei.com, bodeddub@amazon.com,
        corbet@lwn.net, willy@infradead.org, 21cnbao@gmail.com
Cc:     duanxiongchun@bytedance.com, fam.zheng@bytedance.com,
        smuchun@gmail.com, zhengqi.arch@bytedance.com,
        linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-mm@kvack.org, Muchun Song <songmuchun@bytedance.com>
Subject: [PATCH v7 5/5] mm: sparsemem: move vmemmap related to HugeTLB to CONFIG_HUGETLB_PAGE_FREE_VMEMMAP
Date:   Mon,  1 Nov 2021 11:16:51 +0800
Message-Id: <20211101031651.75851-6-songmuchun@bytedance.com>
In-Reply-To: <20211101031651.75851-1-songmuchun@bytedance.com>
References: <20211101031651.75851-1-songmuchun@bytedance.com>
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The vmemmap_remap_free/alloc are relevant to HugeTLB, so move those
functiongs to the scope of CONFIG_HUGETLB_PAGE_FREE_VMEMMAP.

Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Reviewed-by: Barry Song <song.bao.hua@hisilicon.com>
---
 include/linux/mm.h  | 2 ++
 mm/sparse-vmemmap.c | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index a7e4a9e7d807..8c85863a067c 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -3184,10 +3184,12 @@ static inline void print_vma_addr(char *prefix, unsigned long rip)
 }
 #endif
 
+#ifdef CONFIG_HUGETLB_PAGE_FREE_VMEMMAP
 int vmemmap_remap_free(unsigned long start, unsigned long end,
 		       unsigned long reuse);
 int vmemmap_remap_alloc(unsigned long start, unsigned long end,
 			unsigned long reuse, gfp_t gfp_mask);
+#endif
 
 void *sparse_buffer_alloc(unsigned long size);
 struct page * __populate_section_memmap(unsigned long pfn,
diff --git a/mm/sparse-vmemmap.c b/mm/sparse-vmemmap.c
index c64d1aa3c4b5..8aecd6b3896c 100644
--- a/mm/sparse-vmemmap.c
+++ b/mm/sparse-vmemmap.c
@@ -34,6 +34,7 @@
 #include <asm/pgalloc.h>
 #include <asm/tlbflush.h>
 
+#ifdef CONFIG_HUGETLB_PAGE_FREE_VMEMMAP
 /**
  * struct vmemmap_remap_walk - walk vmemmap page table
  *
@@ -419,6 +420,7 @@ int vmemmap_remap_alloc(unsigned long start, unsigned long end,
 
 	return 0;
 }
+#endif /* CONFIG_HUGETLB_PAGE_FREE_VMEMMAP */
 
 /*
  * Allocate a block of memory to be used to back the virtual memory map
-- 
2.11.0