[PATCH] mm/spase: never partially remove memmap for early section

[Wei Yang]

For early sections, we assumes its memmap will never be partially
removed. But current behavior breaks this.

Let's correct it.

Fixes: ba72b4c8cf60 ("mm/sparsemem: support sub-section hotplug")
Signed-off-by: Wei Yang <richard.weiy...@linux.alibaba.com>
---
 mm/sparse.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/mm/sparse.c b/mm/sparse.c
index b2b9a3e34696..1a0069f492f5 100644
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -825,10 +825,10 @@ static void section_deactivate(unsigned long pfn, 
unsigned long nr_pages,
                ms->section_mem_map &= ~SECTION_HAS_MEM_MAP;
        }
 
-       if (section_is_early && memmap)
-               free_map_bootmem(memmap);
-       else
+       if (!section_is_early)
                depopulate_section_memmap(pfn, nr_pages, altmap);
+       else if (memmap)
+               free_map_bootmem(memmap);
 
        if (empty)
                ms->section_mem_map = (unsigned long)NULL;
-- 
2.20.1 (Apple Git-117)