[PATCH 04/16] huge tmpfs: revert shmem's use of transhuge_vma_enabled()

[Hugh Dickins]

5.14 commit e6be37b2e7bd ("mm/huge_memory.c: add missing read-only THP
checking in transparent_hugepage_enabled()") added transhuge_vma_enabled()
as a wrapper for two very different checks: shmem_huge_enabled() prefers
to show those two checks explicitly, as before.

Signed-off-by: Hugh Dickins <hughd@xxxxxxxxxx>
---
 mm/shmem.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/mm/shmem.c b/mm/shmem.c
index ce3ccaac54d6..c6fa6f4f2db8 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -4003,7 +4003,8 @@ bool shmem_huge_enabled(struct vm_area_struct *vma)
 	loff_t i_size;
 	pgoff_t off;
 
-	if (!transhuge_vma_enabled(vma, vma->vm_flags))
+	if ((vma->vm_flags & VM_NOHUGEPAGE) ||
+	    test_bit(MMF_DISABLE_THP, &vma->vm_mm->flags))
 		return false;
 	if (shmem_huge == SHMEM_HUGE_FORCE)
 		return true;
-- 
2.26.2