[PATCH v4 13/54] convert hugetlbfs

Al Viro
2025-11-18T05:22:32Z

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