linux-imx

            for (i = 0; i < permits->nr_permits; i++) {

                if (permits->permits[i].key < key)

                    continue;

                if (permits->permits[i].key > key)

                    break;

                if (permits->permits[i].access != caller_access) {

                    changed = true;

                    break;

                }

​

                    changed = true;

                    break;

                }

​

                /* The cache is still good. */

                rcu_read_unlock();

                return;

            }

        }

​

                goto someone_else_changed_it_unlock;

            RCU_INIT_POINTER(vnode->permit_cache, NULL);

            spin_unlock(&vnode->lock);

​

            afs_put_permits(permits);

            permits = NULL;

            size = 0;

        }

    }

​

        goto someone_else_changed_it;

​

    /* We need a ref on any permits list we want to copy as we'll have to

     * drop the lock to do memory allocation.

     */

    if (permits && !refcount_inc_not_zero(&permits->usage))

        goto someone_else_changed_it;

​

    rcu_read_unlock();

​

    replacement = new;

    new = NULL;

​

found:

    spin_unlock(&afs_permits_lock);

​

    kfree(new);

​

    spin_lock(&vnode->lock);

    zap = rcu_access_pointer(vnode->permit_cache);

        zap == permits)

        rcu_assign_pointer(vnode->permit_cache, replacement);

    else

        zap = replacement;

    spin_unlock(&vnode->lock);

    afs_put_permits(zap);

out_put:

    afs_put_permits(permits);

    return;

​