Merge tag 'vfs-7.1-rc1.bh.metadata' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

Pull vfs buffer_head updates from Christian Brauner:
 "This cleans up the mess that has accumulated over the years in
  metadata buffer_head tracking for inodes.

  It moves the tracking into dedicated structure in filesystem-private
  part of the inode (so that we don't use private_list, private_data,
  and private_lock in struct address_space), and also moves couple other
  users of private_data and private_list so these are removed from
  struct address_space saving 3 longs in struct inode for 99% of inodes"

* tag 'vfs-7.1-rc1.bh.metadata' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: (42 commits)
  fs: Drop i_private_list from address_space
  fs: Drop mapping_metadata_bhs from address space
  ext4: Track metadata bhs in fs-private inode part
  minix: Track metadata bhs in fs-private inode part
  udf: Track metadata bhs in fs-private inode part
  fat: Track metadata bhs in fs-private inode part
  bfs: Track metadata bhs in fs-private inode part
  affs: Track metadata bhs in fs-private inode part
  ext2: Track metadata bhs in fs-private inode part
  fs: Provide functions for handling mapping_metadata_bhs directly
  fs: Switch inode_has_buffers() to take mapping_metadata_bhs
  fs: Make bhs point to mapping_metadata_bhs
  fs: Move metadata bhs tracking to a separate struct
  fs: Fold fsync_buffers_list() into sync_mapping_buffers()
  fs: Drop osync_buffers_list()
  kvm: Use private inode list instead of i_private_list
  fs: Remove i_private_data
  aio: Stop using i_private_data and i_private_lock
  hugetlbfs: Stop using i_private_data
  fs: Stop using i_private_data for metadata bh tracking
  ...

1 files changed, 7 insertions, 5 deletions

diff --git a/virt/kvm/guest_memfd.c b/virt/kvm/guest_memfd.c
index 017d84a7adf3..42b237491c4e 100644
--- a/virt/kvm/guest_memfd.c
+++ b/virt/kvm/guest_memfd.c
@@ -30,6 +30,7 @@ struct gmem_file {
 struct gmem_inode {
 	struct shared_policy policy;
 	struct inode vfs_inode;
+	struct list_head gmem_file_list;
 
 	u64 flags;
 };
@@ -39,8 +40,8 @@ static __always_inline struct gmem_inode *GMEM_I(struct inode *inode)
 	return container_of(inode, struct gmem_inode, vfs_inode);
 }
 
-#define kvm_gmem_for_each_file(f, mapping) \
-	list_for_each_entry(f, &(mapping)->i_private_list, entry)
+#define kvm_gmem_for_each_file(f, inode) \
+	list_for_each_entry(f, &GMEM_I(inode)->gmem_file_list, entry)
 
 /**
  * folio_file_pfn - like folio_file_page, but return a pfn.
@@ -202,7 +203,7 @@ static void kvm_gmem_invalidate_begin(struct inode *inode, pgoff_t start,
 
 	attr_filter = kvm_gmem_get_invalidate_filter(inode);
 
-	kvm_gmem_for_each_file(f, inode->i_mapping)
+	kvm_gmem_for_each_file(f, inode)
 		__kvm_gmem_invalidate_begin(f, start, end, attr_filter);
 }
 
@@ -223,7 +224,7 @@ static void kvm_gmem_invalidate_end(struct inode *inode, pgoff_t start,
 {
 	struct gmem_file *f;
 
-	kvm_gmem_for_each_file(f, inode->i_mapping)
+	kvm_gmem_for_each_file(f, inode)
 		__kvm_gmem_invalidate_end(f, start, end);
 }
 
@@ -609,7 +610,7 @@ static int __kvm_gmem_create(struct kvm *kvm, loff_t size, u64 flags)
 	kvm_get_kvm(kvm);
 	f->kvm = kvm;
 	xa_init(&f->bindings);
-	list_add(&f->entry, &inode->i_mapping->i_private_list);
+	list_add(&f->entry, &GMEM_I(inode)->gmem_file_list);
 
 	fd_install(fd, file);
 	return fd;
@@ -945,6 +946,7 @@ static struct inode *kvm_gmem_alloc_inode(struct super_block *sb)
 	mpol_shared_policy_init(&gi->policy, NULL);
 
 	gi->flags = 0;
+	INIT_LIST_HEAD(&gi->gmem_file_list);
 	return &gi->vfs_inode;
 }