Commit b4ccec41 authored by Michal Hocko's avatar Michal Hocko Committed by Linus Torvalds

mm/sparse.c: fix typo in online_mem_sections

online_mem_sections() accidentally marks online only the first section
in the given range.  This is a typo which hasn't been noticed because I
haven't tested large 2GB blocks previously.  All users of
pfn_to_online_page would get confused on the the rest of the pfn range
in the block.

All we need to fix this is to use iterator (pfn) rather than start_pfn.

Fixes: 2d070eab ("mm: consider zone which is not fully populated to have holes")
Signed-off-by: default avatarMichal Hocko <>
Acked-by: default avatarVlastimil Babka <>
Cc: Anshuman Khandual <>
Cc: <>
Signed-off-by: default avatarAndrew Morton <>
Signed-off-by: default avatarLinus Torvalds <>
parent de0c799b
......@@ -626,7 +626,7 @@ void online_mem_sections(unsigned long start_pfn, unsigned long end_pfn)
unsigned long pfn;
for (pfn = start_pfn; pfn < end_pfn; pfn += PAGES_PER_SECTION) {
unsigned long section_nr = pfn_to_section_nr(start_pfn);
unsigned long section_nr = pfn_to_section_nr(pfn);
struct mem_section *ms;
/* onlining code should never touch invalid ranges */
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