[PATCH 7.2 v2 03/12] mm/huge_memory: remove READ_ONLY_THP_FOR_FS from file_thp_enabled()

[Zi Yan]

Replace it with a check on the max folio order of the file's address space
mapping, making sure PMD_ORDER is supported.

Signed-off-by: Zi Yan <z...@nvidia.com>
---
 mm/huge_memory.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 970e077019b7..a22bb2364bdc 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -86,9 +86,6 @@ static inline bool file_thp_enabled(struct vm_area_struct 
*vma)
 {
        struct inode *inode;
 
-       if (!IS_ENABLED(CONFIG_READ_ONLY_THP_FOR_FS))
-               return false;
-
        if (!vma->vm_file)
                return false;
 
@@ -97,6 +94,9 @@ static inline bool file_thp_enabled(struct vm_area_struct 
*vma)
        if (IS_ANON_FILE(inode))
                return false;
 
+       if (mapping_max_folio_order(inode->i_mapping) < PMD_ORDER)
+               return false;
+
        return !inode_is_open_for_write(inode) && S_ISREG(inode->i_mode);
 }
 
-- 
2.43.0