[PATCH v2 08/10] mm/page_alloc: correct the use of is_highmem_idx()

From: js1304
Date: Tue Apr 28 2020 - 23:27:42 EST


From: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>

What we'd like to check here is whether page has direct mapping or not.
Use PageHighMem() since it is perfectly matched for this purpose.

Acked-by: Roman Gushchin <guro@xxxxxx>
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
---
mm/page_alloc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 7fe5115..da473c7 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1399,7 +1399,7 @@ static void __meminit __init_single_page(struct page *page, unsigned long pfn,
INIT_LIST_HEAD(&page->lru);
#ifdef WANT_PAGE_VIRTUAL
/* The shift won't overflow because ZONE_NORMAL is below 4G. */
- if (!is_highmem_idx(zone))
+ if (!PageHighMem(page))
set_page_address(page, __va(pfn << PAGE_SHIFT));
#endif
}
--
2.7.4