Am Mi., 18. Juni 2025 um 22:54 Uhr schrieb Christian Brauner
<brauner@xxxxxxxxxx>:
>
> We don't need it anymore as persistent information is allocated lazily
> and stashed in struct pid.
>
> Signed-off-by: Christian Brauner <brauner@xxxxxxxxxx>
Reviewed-by: Alexander Mikhalitsyn <aleksandr.mikhalitsyn@xxxxxxxxxxxxx>
> ---
> fs/pidfs.c | 39 ---------------------------------------
> 1 file changed, 39 deletions(-)
>
> diff --git a/fs/pidfs.c b/fs/pidfs.c
> index 72aac4f7b7d5..c49c53d6ae51 100644
> --- a/fs/pidfs.c
> +++ b/fs/pidfs.c
> @@ -27,7 +27,6 @@
>
> #define PIDFS_PID_DEAD ERR_PTR(-ESRCH)
>
> -static struct kmem_cache *pidfs_cachep __ro_after_init;
> static struct kmem_cache *pidfs_attr_cachep __ro_after_init;
>
> /*
> @@ -45,15 +44,6 @@ struct pidfs_attr {
> struct pidfs_exit_info *exit_info;
> };
>
> -struct pidfs_inode {
> - struct inode vfs_inode;
> -};
> -
> -static inline struct pidfs_inode *pidfs_i(struct inode *inode)
> -{
> - return container_of(inode, struct pidfs_inode, vfs_inode);
> -}
> -
> static struct rb_root pidfs_ino_tree = RB_ROOT;
>
> #if BITS_PER_LONG == 32
> @@ -686,27 +676,9 @@ static void pidfs_evict_inode(struct inode *inode)
> put_pid(pid);
> }
>
> -static struct inode *pidfs_alloc_inode(struct super_block *sb)
> -{
> - struct pidfs_inode *pi;
> -
> - pi = alloc_inode_sb(sb, pidfs_cachep, GFP_KERNEL);
> - if (!pi)
> - return NULL;
> -
> - return &pi->vfs_inode;
> -}
> -
> -static void pidfs_free_inode(struct inode *inode)
> -{
> - kfree(pidfs_i(inode));
> -}
> -
> static const struct super_operations pidfs_sops = {
> - .alloc_inode = pidfs_alloc_inode,
> .drop_inode = generic_delete_inode,
> .evict_inode = pidfs_evict_inode,
> - .free_inode = pidfs_free_inode,
> .statfs = simple_statfs,
> };
>
> @@ -1067,19 +1039,8 @@ void pidfs_put_pid(struct pid *pid)
> dput(pid->stashed);
> }
>
> -static void pidfs_inode_init_once(void *data)
> -{
> - struct pidfs_inode *pi = data;
> -
> - inode_init_once(&pi->vfs_inode);
> -}
> -
> void __init pidfs_init(void)
> {
> - pidfs_cachep = kmem_cache_create("pidfs_cache", sizeof(struct pidfs_inode), 0,
> - (SLAB_HWCACHE_ALIGN | SLAB_RECLAIM_ACCOUNT |
> - SLAB_ACCOUNT | SLAB_PANIC),
> - pidfs_inode_init_once);
> pidfs_attr_cachep = kmem_cache_create("pidfs_attr_cache", sizeof(struct pidfs_attr), 0,
> (SLAB_HWCACHE_ALIGN | SLAB_RECLAIM_ACCOUNT |
> SLAB_ACCOUNT | SLAB_PANIC), NULL);
>
> --
> 2.47.2
>
