[PATCH -next] mm: don't try THP align for FS without get_unmapped_area

[Kefeng Wang <wangkefeng.wang@huawei.com>]

Commit ed48e87c7df3 ("thp: add thp_get_unmapped_area_vmflags()")
changes thp_get_unmapped_area() to thp_get_unmapped_area_vmflags()
in __get_unmapped_area(), which won't setup get_area for anonymous
mappings, but it leads to always try THP align when file ops without
'.get_unmapped_area' callback too as the get_area is NULL.

Since commit efa7df3e3bb5 ("mm: align larger anonymous mappings on
THP boundaries") only want to enable THP align for anonymous, adding
!file check to fix it.

Fixes: ed48e87c7df3 ("thp: add thp_get_unmapped_area_vmflags()")
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
---
 mm/mmap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/mmap.c b/mm/mmap.c
index 1c6bdffa13dd..b373486bd1c6 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -782,7 +782,7 @@ __get_unmapped_area(struct file *file, unsigned long addr, unsigned long len,
 
 	if (get_area) {
 		addr = get_area(file, addr, len, pgoff, flags);
-	} else if (IS_ENABLED(CONFIG_TRANSPARENT_HUGEPAGE)
+	} else if (IS_ENABLED(CONFIG_TRANSPARENT_HUGEPAGE) && !file
 		   && !addr /* no hint */
 		   && IS_ALIGNED(len, PMD_SIZE)) {
 		/* Ensures that larger anonymous mappings are THP aligned. */
-- 
2.27.0