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authorBaoquan He <bhe@redhat.com>2020-04-01 21:09:31 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-04-02 09:35:30 -0700
commit3af776f601dc13e1cae1f0f461407533669cf666 (patch)
tree9cac3175a153d17a2055209da23efe1a2dbcbb0a
parente03d1f78341e8a16f6cb5be5dfcd37ddc31a6839 (diff)
downloadlinux-3af776f601dc13e1cae1f0f461407533669cf666.tar.bz2
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 <mhocko@kernel.org> Signed-off-by: Baoquan He <bhe@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: David Hildenbrand <david@redhat.com> Reviewed-by: Pankaj Gupta <pankaj.gupta.linux@gmail.com> Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org> Reviewed-by: Wei Yang <richard.weiyang@gmail.com> Acked-by: Michal Hocko <mhocko@suse.com> Link: http://lkml.kernel.org/r/20200316125450.GG3486@MiWiFi-R3L-srv Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--mm/sparse.c27
1 files 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)