[PATCH 1/3] mm: huge_memory: move file_thp_enabled() into huge_memory.c

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

The file_thp_enabled() only used in __thp_vma_allowable_orders(),
so move it into huge_memory.c, also check READ_ONLY_THP_FOR_FS
ahead to avoid unnecessary code if config disabled.

Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
---
 include/linux/huge_mm.h | 13 -------------
 mm/huge_memory.c        | 15 +++++++++++++++
 2 files changed, 15 insertions(+), 13 deletions(-)

diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h
index 3eca60f3d512..795df660efa5 100644
--- a/include/linux/huge_mm.h
+++ b/include/linux/huge_mm.h
@@ -253,19 +253,6 @@ static inline unsigned long thp_vma_suitable_orders(struct vm_area_struct *vma,
 	return orders;
 }
 
-static inline bool file_thp_enabled(struct vm_area_struct *vma)
-{
-	struct inode *inode;
-
-	if (!vma->vm_file)
-		return false;
-
-	inode = vma->vm_file->f_inode;
-
-	return (IS_ENABLED(CONFIG_READ_ONLY_THP_FOR_FS)) &&
-	       !inode_is_open_for_write(inode) && S_ISREG(inode->i_mode);
-}
-
 unsigned long __thp_vma_allowable_orders(struct vm_area_struct *vma,
 					 unsigned long vm_flags,
 					 unsigned long tva_flags,
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index cc346c771921..d23e4aab7511 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -83,6 +83,21 @@ unsigned long huge_anon_orders_madvise __read_mostly;
 unsigned long huge_anon_orders_inherit __read_mostly;
 static bool anon_orders_configured __initdata;
 
+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;
+
+	inode = file_inode(vma->vm_file);
+
+	return !inode_is_open_for_write(inode) && S_ISREG(inode->i_mode);
+}
+
 unsigned long __thp_vma_allowable_orders(struct vm_area_struct *vma,
 					 unsigned long vm_flags,
 					 unsigned long tva_flags,
-- 
2.27.0