-#ifdef CONFIG_TRANSPARENT_HUGEPAGE
-bool shmem_huge_enabled(struct vm_area_struct *vma)
-{
- struct inode *inode = file_inode(vma->vm_file);
- struct shmem_sb_info *sbinfo = SHMEM_SB(inode->i_sb);
- loff_t i_size;
- pgoff_t off;
-
- if (!transhuge_vma_enabled(vma, vma->vm_flags))
- return false;
- if (shmem_huge == SHMEM_HUGE_FORCE)
- return true;
- if (shmem_huge == SHMEM_HUGE_DENY)
- return false;
- switch (sbinfo->huge) {
- case SHMEM_HUGE_NEVER:
- return false;
- case SHMEM_HUGE_ALWAYS:
- return true;
- case SHMEM_HUGE_WITHIN_SIZE:
- off = round_up(vma->vm_pgoff, HPAGE_PMD_NR);
- i_size = round_up(i_size_read(inode), PAGE_SIZE);
- if (i_size >= HPAGE_PMD_SIZE &&
- i_size >> PAGE_SHIFT >= off)
- return true;
- fallthrough;
- case SHMEM_HUGE_ADVISE:
- /* TODO: implement fadvise() hints */
- return (vma->vm_flags & VM_HUGEPAGE);
- default:
- VM_BUG_ON(1);
- return false;
- }
-}
-#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
-