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

Huang Shijie
2026-04-13T06:37:38Z

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

Signed-off-by: Huang Shijie <huangsj@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