ipc_lock_object(&ipcp->shm_perm);
}
-static void __shm_free(struct shmid_kernel *shp)
-{
- kvfree(shp);
-}
-
static void shm_rcu_free(struct rcu_head *head)
{
struct kern_ipc_perm *ptr = container_of(head, struct kern_ipc_perm,
struct shmid_kernel *shp = container_of(ptr, struct shmid_kernel,
shm_perm);
security_shm_free(shp);
- __shm_free(shp);
+ kvfree(shp);
}
static inline void shm_rmid(struct ipc_namespace *ns, struct shmid_kernel *s)
size_t numpages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
struct file *file;
char name[13];
- int id;
vm_flags_t acctflag = 0;
if (size < SHMMIN || size > ns->shm_ctlmax)
ns->shm_tot + numpages > ns->shm_ctlall)
return -ENOSPC;
- BUILD_BUG_ON(offsetof(struct shmid_kernel, shm_perm) != 0);
-
- shp = container_of(ipc_rcu_alloc(sizeof(*shp)), struct shmid_kernel,
- shm_perm);
- if (!shp)
+ shp = kvmalloc(sizeof(*shp), GFP_KERNEL);
+ if (unlikely(!shp))
return -ENOMEM;
shp->shm_perm.key = key;
shp->shm_perm.security = NULL;
error = security_shm_alloc(shp);
if (error) {
- __shm_free(shp);
+ kvfree(shp);
return error;
}
shp->shm_file = file;
shp->shm_creator = current;
- id = ipc_addid(&shm_ids(ns), &shp->shm_perm, ns->shm_ctlmni);
- if (id < 0) {
- error = id;
+ error = ipc_addid(&shm_ids(ns), &shp->shm_perm, ns->shm_ctlmni);
+ if (error < 0)
goto no_id;
- }
list_add(&shp->shm_clist, ¤t->sysvshm.shm_clist);
user_shm_unlock(size, shp->mlock_user);
fput(file);
no_file:
- ipc_rcu_putref(&shp->shm_perm, shm_rcu_free);
+ call_rcu(&shp->shm_perm.rcu, shm_rcu_free);
return error;
}