From: Li Chen <lchen@xxxxxxxxxxxxx> When mhp use sparse_add_section, don't check no-map region, so that to allow no-map reserved memory to get struct page support. Signed-off-by: Li Chen <lchen@xxxxxxxxxxxxx> Change-Id: I0d2673cec1b66adf695251037a00c240976b226f --- mm/sparse.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/mm/sparse.c b/mm/sparse.c index 120bc8ea5293..a29cd1e7014f 100644 --- a/mm/sparse.c +++ b/mm/sparse.c @@ -690,7 +690,9 @@ static int fill_subsection_map(unsigned long pfn, unsigned long nr_pages) if (bitmap_empty(map, SUBSECTIONS_PER_SECTION)) rc = -EINVAL; - else if (bitmap_intersects(map, subsection_map, SUBSECTIONS_PER_SECTION)) + else if (memblock_is_map_memory(PFN_PHYS(pfn)) && + bitmap_intersects(map, subsection_map, + SUBSECTIONS_PER_SECTION)) rc = -EEXIST; else bitmap_or(subsection_map, map, subsection_map, -- 2.25.1
