From 3af776f601dc13e1cae1f0f461407533669cf666 Mon Sep 17 00:00:00 2001 From: Baoquan He Date: Wed, 1 Apr 2020 21:09:31 -0700 Subject: [PATCH] mm/sparse.c: use kvmalloc/kvfree to alloc/free memmap for the classic sparse This change makes populate_section_memmap()/depopulate_section_memmap much simpler. Suggested-by: Michal Hocko Signed-off-by: Baoquan He Signed-off-by: Andrew Morton Reviewed-by: David Hildenbrand Reviewed-by: Pankaj Gupta Reviewed-by: Matthew Wilcox (Oracle) Reviewed-by: Wei Yang Acked-by: Michal Hocko Link: http://lkml.kernel.org/r/20200316125450.GG3486@MiWiFi-R3L-srv Signed-off-by: Linus Torvalds --- mm/sparse.c | 27 +++------------------------ 1 file changed, 3 insertions(+), 24 deletions(-) diff --git a/mm/sparse.c b/mm/sparse.c index 55fe305e8d7b..f0705f4167cb 100644 --- a/mm/sparse.c +++ b/mm/sparse.c @@ -664,35 +664,14 @@ static void free_map_bootmem(struct page *memmap) struct page * __meminit populate_section_memmap(unsigned long pfn, unsigned long nr_pages, int nid, struct vmem_altmap *altmap) { - struct page *page, *ret; - unsigned long memmap_size = sizeof(struct page) * PAGES_PER_SECTION; - - page = alloc_pages(GFP_KERNEL|__GFP_NOWARN, get_order(memmap_size)); - if (page) - goto got_map_page; - - ret = vmalloc(memmap_size); - if (ret) - goto got_map_ptr; - - return NULL; -got_map_page: - ret = (struct page *)pfn_to_kaddr(page_to_pfn(page)); -got_map_ptr: - - return ret; + return kvmalloc(array_size(sizeof(struct page), + PAGES_PER_SECTION), GFP_KERNEL); } static void depopulate_section_memmap(unsigned long pfn, unsigned long nr_pages, struct vmem_altmap *altmap) { - struct page *memmap = pfn_to_page(pfn); - - if (is_vmalloc_addr(memmap)) - vfree(memmap); - else - free_pages((unsigned long)memmap, - get_order(sizeof(struct page) * PAGES_PER_SECTION)); + kvfree(pfn_to_page(pfn)); } static void free_map_bootmem(struct page *memmap)