[PATCH 1/3] mm: use mapping_mapped to simplify the code

[Huang Shijie]

Use mapping_mapped() to simplify the code, make
the code tidy and clean.

Signed-off-by: Huang Shijie <huan...@hygon.cn>
---
 fs/hugetlbfs/inode.c | 4 ++--
 mm/memory.c          | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index 3f70c47981de..ab5ac092d8a6 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -646,7 +646,7 @@ static void hugetlb_vmtruncate(struct inode *inode, loff_t 
offset)
 
        i_size_write(inode, offset);
        i_mmap_lock_write(mapping);
-       if (!RB_EMPTY_ROOT(&mapping->i_mmap.rb_root))
+       if (mapping_mapped(mapping))
                hugetlb_vmdelete_list(&mapping->i_mmap, pgoff, 0,
                                      ZAP_FLAG_DROP_MARKER);
        i_mmap_unlock_write(mapping);
@@ -707,7 +707,7 @@ static long hugetlbfs_punch_hole(struct inode *inode, 
loff_t offset, loff_t len)
 
        /* Unmap users of full pages in the hole. */
        if (hole_end > hole_start) {
-               if (!RB_EMPTY_ROOT(&mapping->i_mmap.rb_root))
+               if (mapping_mapped(mapping))
                        hugetlb_vmdelete_list(&mapping->i_mmap,
                                              hole_start >> PAGE_SHIFT,
                                              hole_end >> PAGE_SHIFT, 0);
diff --git a/mm/memory.c b/mm/memory.c
index 2f815a34d924..366054435773 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -4297,7 +4297,7 @@ void unmap_mapping_folio(struct folio *folio)
        details.zap_flags = ZAP_FLAG_DROP_MARKER;
 
        i_mmap_lock_read(mapping);
-       if (unlikely(!RB_EMPTY_ROOT(&mapping->i_mmap.rb_root)))
+       if (unlikely(mapping_mapped(mapping)))
                unmap_mapping_range_tree(&mapping->i_mmap, first_index,
                                         last_index, &details);
        i_mmap_unlock_read(mapping);
@@ -4327,7 +4327,7 @@ void unmap_mapping_pages(struct address_space *mapping, 
pgoff_t start,
                last_index = ULONG_MAX;
 
        i_mmap_lock_read(mapping);
-       if (unlikely(!RB_EMPTY_ROOT(&mapping->i_mmap.rb_root)))
+       if (unlikely(mapping_mapped(mapping)))
                unmap_mapping_range_tree(&mapping->i_mmap, first_index,
                                         last_index, &details);
        i_mmap_unlock_read(mapping);
-- 
2.43.0