shmem_huge_enabled() is about to be enhanced into shmem_is_huge(),
so that it can be used more widely throughout: before making functional
changes, shift it to its final position (to avoid forward declaration).
Signed-off-by: Hugh Dickins <hughd@xxxxxxxxxx>
Reviewed-by: Yang Shi <shy828301@xxxxxxxxx>
---
mm/shmem.c | 72 ++++++++++++++++++++++++++----------------------------
1 file changed, 35 insertions(+), 37 deletions(-)
diff --git a/mm/shmem.c b/mm/shmem.c
index c6fa6f4f2db8..740d48ef1eb5 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -476,6 +476,41 @@ static bool shmem_confirm_swap(struct address_space *mapping,
static int shmem_huge __read_mostly;
+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 ((vma->vm_flags & VM_NOHUGEPAGE) ||
+ test_bit(MMF_DISABLE_THP, &vma->vm_mm->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;
+ }
+}
+
#if defined(CONFIG_SYSFS)
static int shmem_parse_huge(const char *str)
{
@@ -3995,43 +4030,6 @@ struct kobj_attribute shmem_enabled_attr =
__ATTR(shmem_enabled, 0644, shmem_enabled_show, shmem_enabled_store);
#endif /* CONFIG_TRANSPARENT_HUGEPAGE && CONFIG_SYSFS */
-#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 ((vma->vm_flags & VM_NOHUGEPAGE) ||
- test_bit(MMF_DISABLE_THP, &vma->vm_mm->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 */
-
#else /* !CONFIG_SHMEM */
/*
--
2.26.2
