[PATCH v4 13/54] convert hugetlbfs
From: Al Viro <viro@zeniv.linux.org.uk>
Date: 2025-11-18 05:16:10
Also in:
bpf, linux-efi, linux-fsdevel, linux-mm, linux-usb, linuxppc-dev, selinux
Subsystem:
filesystems (vfs and infrastructure), hugetlb subsystem, the rest · Maintainers:
Alexander Viro, Christian Brauner, Muchun Song, Oscar Salvador, Linus Torvalds
Very much ramfs-like; dget()+d_instantiate() -> d_make_persistent() (in two places) is all it takes. NB: might make sense to turn its ->put_super() into ->kill_sb(). Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> --- fs/hugetlbfs/inode.c | 12 +++++------- 1 file changed, 5 insertions(+), 7 deletions(-)
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index f42548ee9083..83273677183d 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c@@ -975,8 +975,7 @@ static int hugetlbfs_mknod(struct mnt_idmap *idmap, struct inode *dir, if (!inode) return -ENOSPC; inode_set_mtime_to_ts(dir, inode_set_ctime_current(dir)); - d_instantiate(dentry, inode); - dget(dentry);/* Extra count - pin the dentry in core */ + d_make_persistent(dentry, inode); return 0; }
@@ -1023,10 +1022,9 @@ static int hugetlbfs_symlink(struct mnt_idmap *idmap, if (inode) { int l = strlen(symname)+1; error = page_symlink(inode, symname, l); - if (!error) { - d_instantiate(dentry, inode); - dget(dentry); - } else + if (!error) + d_make_persistent(dentry, inode); + else iput(inode); } inode_set_mtime_to_ts(dir, inode_set_ctime_current(dir));
@@ -1483,7 +1481,7 @@ static struct file_system_type hugetlbfs_fs_type = { .name = "hugetlbfs", .init_fs_context = hugetlbfs_init_fs_context, .parameters = hugetlb_fs_parameters, - .kill_sb = kill_litter_super, + .kill_sb = kill_anon_super, .fs_flags = FS_ALLOW_IDMAP, };
--
2.47.3