[PATCH] mm: drop VM_BUG_ON from __get_free_pages

[Michal Hocko]

There is no real reason to blow up just because the caller doesn't know
that __get_free_pages cannot return highmem pages. Simply fix that up
silently. Even if we have some confused users such a fixup will not be
harmful.

Signed-off-by: Michal Hocko <mhocko@xxxxxxxx>
---
 mm/page_alloc.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 0d518e9b2ee8..3dd960ea8c13 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -4284,9 +4284,7 @@ unsigned long __get_free_pages(gfp_t gfp_mask, unsigned int order)
 	 * __get_free_pages() returns a virtual address, which cannot represent
 	 * a highmem page
 	 */
-	VM_BUG_ON((gfp_mask & __GFP_HIGHMEM) != 0);
-
-	page = alloc_pages(gfp_mask, order);
+	page = alloc_pages(gfp_mask & ~__GFP_HIGHMEM, order);
 	if (!page)
 		return 0;
 	return (unsigned long) page_address(page);
-- 
2.15.0

-- 
Michal Hocko
SUSE Labs