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pidfs: remove custom inode allocation

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We don't need it anymore as persistent information is allocated lazily
and stashed in struct pid.

Link: https://lore.kernel.org/20250618-work-pidfs-persistent-v2-7-98f3456fd552@kernel.org
Reviewed-by: Alexander Mikhalitsyn <aleksandr.mikhalitsyn@canonical.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Christian Brauner 2025-06-18 22:53:41 +02:00
parent 5ee83f8d1a
commit 0f93d71b9d
1 changed files with 0 additions and 39 deletions
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39
fs/pidfs.c
View file

@ -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);