static base_jd_event_code kbase_fence_trigger(kbase_jd_atom *katom, int result)
{
struct sync_pt *pt;
struct sync_timeline *timeline;
if (!list_is_singular(&katom->fence->pt_list_head))
{
/* Not exactly one item in the list - so it didn't (directly) come from us */
return BASE_JD_EVENT_JOB_CANCELLED;
}
pt = list_first_entry(&katom->fence->pt_list_head, struct sync_pt, pt_list);
timeline = pt->parent;
if (!kbase_sync_timeline_is_ours(timeline))
{
/* Fence has a sync_pt which isn't ours! */
return BASE_JD_EVENT_JOB_CANCELLED;
}
kbase_sync_signal_pt(pt, result);
sync_timeline_signal(timeline);
return (result < 0) ? BASE_JD_EVENT_JOB_CANCELLED : BASE_JD_EVENT_DONE;
}
/**
@brief 更新LRU排序，降低淘汰率
*/
void fss_dbd_lru_update(struct dbd * dbd)
{
struct list_head * next;
/* 增加其访问频率 */
ke_atomic_inc(&dbd->access_counter);
if ((ke_atomic_read(&dbd->access_counter) & FSS_DBD_LEVEL_EXCHANGE_MASK) == 0)
{
ke_spin_lock(&cache_desc()->sort_lock);
/* 如果只有一个节点，无需交换 */
if (unlikely(list_is_singular(&cache_desc()->sort_list)))
goto no_update;
/* 与下一个DBD交换位置 */
next = dbd->list.next;
list_del(&dbd->list);
list_add(&dbd->list, next);
no_update:
ke_spin_unlock(&cache_desc()->sort_lock);
}
return;
}
static void do_ppgtt_cleanup(struct i915_hw_ppgtt *ppgtt)
{
struct drm_device *dev = ppgtt->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct i915_address_space *vm = &ppgtt->base;
if (ppgtt == dev_priv->mm.aliasing_ppgtt ||
(list_empty(&vm->active_list) && list_empty(&vm->inactive_list))) {
ppgtt->base.cleanup(&ppgtt->base);
return;
}
/*
* Make sure vmas are unbound before we take down the drm_mm
*
* FIXME: Proper refcounting should take care of this, this shouldn't be
* needed at all.
*/
if (!list_empty(&vm->active_list)) {
struct i915_vma *vma;
list_for_each_entry(vma, &vm->active_list, mm_list)
if (WARN_ON(list_empty(&vma->vma_link) ||
list_is_singular(&vma->vma_link)))
break;
i915_gem_evict_vm(&ppgtt->base, true);
} else {
static int unix_sock_modesw(struct globals *globals,
struct alfred_modeswitch_v0 *modeswitch,
int client_sock)
{
int len, ret = -1;
len = ntohs(modeswitch->header.length);
if (len < (int)(sizeof(*modeswitch) - sizeof(modeswitch->header)))
goto err;
switch (modeswitch->mode) {
case ALFRED_MODESWITCH_SLAVE:
if (!list_is_singular(&globals->interfaces))
goto err;
globals->opmode = OPMODE_SLAVE;
break;
case ALFRED_MODESWITCH_MASTER:
globals->opmode = OPMODE_MASTER;
break;
default:
goto err;
}
ret = 0;
err:
close(client_sock);
return ret;
}
static int
micvcons_open(struct tty_struct * tty, struct file * filp)
{
micvcons_port_t *port = &mic_data.dd_ports[tty->index];
int ret = 0;
mic_ctx_t *mic_ctx = get_per_dev_ctx(tty->index);
tty->driver_data = port;
mutex_lock(&port->dp_mutex);
spin_lock_bh(&port->dp_lock);
if ((filp->f_flags & O_ACCMODE) != O_RDONLY) {
if (port->dp_writer) {
ret = -EBUSY;
goto exit_locked;
}
port->dp_writer = filp;
port->dp_bytes = 0;
}
if ((filp->f_flags & O_ACCMODE) != O_WRONLY) {
if (port->dp_reader) {
ret = -EBUSY;
goto exit_locked;
}
port->dp_reader = filp;
port->dp_canread = 1;
}
#if LINUX_VERSION_CODE < KERNEL_VERSION(3,9,0)
tty->low_latency = 0;
#else
tty->port->low_latency = 0;
#endif
if (!port->dp_tty)
port->dp_tty = tty;
if (!port->dp_vcons)
port->dp_vcons = &mic_ctx->bi_vcons;
if (tty->count == 1) {
ret = micvcons_start(mic_ctx);
if (ret != 0)
goto exit_locked;
spin_lock(&timer_list_lock);
list_add_tail_rcu(&port->list_member, &timer_list_head);
if (list_is_singular(&timer_list_head)) {
restart_timer_flag = MICVCONS_TIMER_RESTART;
mod_timer(&vcons_timer, jiffies +
msecs_to_jiffies(MICVCONS_SHORT_TIMEOUT));
}
spin_unlock(&timer_list_lock);
}
exit_locked:
spin_unlock_bh(&port->dp_lock);
mutex_unlock(&port->dp_mutex);
return ret;
}
static struct dentry *v9fs_dentry_from_dir_inode(struct inode *inode)
{
struct dentry *dentry;
spin_lock(&inode->i_lock);
/* Directory should have only one entry. */
BUG_ON(S_ISDIR(inode->i_mode) && !list_is_singular(&inode->i_dentry));
dentry = list_entry(inode->i_dentry.next, struct dentry, d_u.d_alias);
spin_unlock(&inode->i_lock);
return dentry;
}
SYSCALL_DEFINE(sched_yield, void)
{
if (!list_is_singular(&pri_runq[current->prio])) {
list_del(¤t->rq);
list_add_tail(¤t->rq, &pri_runq[current->prio]);
}
schedule();
return 0;
}
int v4l2_fh_is_singular(struct v4l2_fh *fh)
{
unsigned long flags;
int is_singular;
if (fh == NULL || fh->vdev == NULL)
return 0;
spin_lock_irqsave(&fh->vdev->fh_lock, flags);
is_singular = list_is_singular(&fh->list);
spin_unlock_irqrestore(&fh->vdev->fh_lock, flags);
return is_singular;
}
static void cx18_mdl_send_to_dvb(struct cx18_stream *s, struct cx18_mdl *mdl)
{
struct cx18_buffer *buf;
if (s->dvb == NULL || !s->dvb->enabled || mdl->bytesused == 0)
return;
/* We ignore mdl and buf readpos accounting here - it doesn't matter */
/* The likely case */
if (list_is_singular(&mdl->buf_list)) {
buf = list_first_entry(&mdl->buf_list, struct cx18_buffer,
list);
if (buf->bytesused)
dvb_dmx_swfilter(&s->dvb->demux,
buf->buf, buf->bytesused);
return;
}
static void cx18_mdl_send_to_dvb(struct cx18_stream *s, struct cx18_mdl *mdl)
{
struct cx18_buffer *buf;
if (s->dvb == NULL || !s->dvb->enabled || mdl->bytesused == 0)
return;
if (list_is_singular(&mdl->buf_list)) {
buf = list_first_entry(&mdl->buf_list, struct cx18_buffer,
list);
if (buf->bytesused)
dvb_dmx_swfilter(&s->dvb->demux,
buf->buf, buf->bytesused);
return;
}
static dma_cookie_t at_xdmac_tx_submit(struct dma_async_tx_descriptor *tx)
{
struct at_xdmac_desc *desc = txd_to_at_desc(tx);
struct at_xdmac_chan *atchan = to_at_xdmac_chan(tx->chan);
dma_cookie_t cookie;
unsigned long irqflags;
spin_lock_irqsave(&atchan->lock, irqflags);
cookie = dma_cookie_assign(tx);
dev_vdbg(chan2dev(tx->chan), "%s: atchan 0x%p, add desc 0x%p to xfers_list\n",
__func__, atchan, desc);
list_add_tail(&desc->xfer_node, &atchan->xfers_list);
if (list_is_singular(&atchan->xfers_list))
at_xdmac_start_xfer(atchan, desc);
spin_unlock_irqrestore(&atchan->lock, irqflags);
return cookie;
}
static int expand_single_string(struct token *tok, struct token *next,
struct string **string_ret)
{
int ret;
LIST_HEAD(string_list);
ret = expand_params_and_word_split(tok, next, &string_list);
if (ret)
goto out_free_string_list;
ret = glue_strings(&string_list);
if (ret)
goto out_free_string_list;
if (!mysh_filename_expansion_disabled) {
ret = do_filename_expansion(&string_list);
if (ret)
goto out_free_string_list;
}
if (list_empty(&string_list))
*string_ret = NULL;
else if (list_is_singular(&string_list))
*string_ret = list_entry(string_list.next, struct string, list);
else {
static void vivid_thread_vid_out_tick(struct vivid_dev *dev)
{
struct vivid_buffer *vid_out_buf = NULL;
struct vivid_buffer *vbi_out_buf = NULL;
dprintk(dev, 1, "Video Output Thread Tick\n");
/* Drop a certain percentage of buffers. */
if (dev->perc_dropped_buffers &&
prandom_u32_max(100) < dev->perc_dropped_buffers)
return;
spin_lock(&dev->slock);
/*
* Only dequeue buffer if there is at least one more pending.
* This makes video loopback possible.
*/
if (!list_empty(&dev->vid_out_active) &&
!list_is_singular(&dev->vid_out_active)) {
vid_out_buf = list_entry(dev->vid_out_active.next,
struct vivid_buffer, list);
list_del(&vid_out_buf->list);
}
/* Generic interrupt line interrupt handler */
static irqreturn_t iio_interrupt_handler(int irq, void *_int_info)
{
struct iio_interrupt *int_info = _int_info;
struct iio_dev *dev_info = int_info->dev_info;
struct iio_event_handler_list *p;
s64 time_ns;
unsigned long flags;
spin_lock_irqsave(&int_info->ev_list_lock, flags);
if (list_empty(&int_info->ev_list)) {
spin_unlock_irqrestore(&int_info->ev_list_lock, flags);
return IRQ_NONE;
}
time_ns = iio_get_time_ns();
/* detect single element list*/
if (list_is_singular(&int_info->ev_list)) {
disable_irq_nosync(irq);
p = list_first_entry(&int_info->ev_list,
struct iio_event_handler_list,
list);
/* single event handler - maybe shared */
p->handler(dev_info, 1, time_ns, !(p->refcount > 1));
} else
/*
* This function is called as an URB transfert is complete (Isochronous pipe).
* So, the traitement is done in interrupt time, so it has be fast, not crash,
* and not stall. Neat.
*/
static void stk_isoc_handler(struct urb *urb)
{
int i;
int ret;
int framelen;
unsigned long flags;
unsigned char *fill = NULL;
unsigned char *iso_buf = NULL;
struct stk_camera *dev;
struct stk_sio_buffer *fb;
dev = (struct stk_camera *) urb->context;
if (dev == NULL) {
STK_ERROR("isoc_handler called with NULL device !\n");
return;
}
if (urb->status == -ENOENT || urb->status == -ECONNRESET
|| urb->status == -ESHUTDOWN) {
atomic_dec(&dev->urbs_used);
return;
}
spin_lock_irqsave(&dev->spinlock, flags);
if (urb->status != -EINPROGRESS && urb->status != 0) {
STK_ERROR("isoc_handler: urb->status == %d\n", urb->status);
goto resubmit;
}
if (list_empty(&dev->sio_avail)) {
/*FIXME Stop streaming after a while */
(void) (printk_ratelimit() &&
STK_ERROR("isoc_handler without available buffer!\n"));
goto resubmit;
}
fb = list_first_entry(&dev->sio_avail,
struct stk_sio_buffer, list);
fill = fb->buffer + fb->v4lbuf.bytesused;
for (i = 0; i < urb->number_of_packets; i++) {
if (urb->iso_frame_desc[i].status != 0) {
if (urb->iso_frame_desc[i].status != -EXDEV)
STK_ERROR("Frame %d has error %d\n", i,
urb->iso_frame_desc[i].status);
continue;
}
framelen = urb->iso_frame_desc[i].actual_length;
iso_buf = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
if (framelen <= 4)
continue; /* no data */
/*
* we found something informational from there
* the isoc frames have to type of headers
* type1: 00 xx 00 00 or 20 xx 00 00
* type2: 80 xx 00 00 00 00 00 00 or a0 xx 00 00 00 00 00 00
* xx is a sequencer which has never been seen over 0x3f
* imho data written down looks like bayer, i see similarities
* after every 640 bytes
*/
if (*iso_buf & 0x80) {
framelen -= 8;
iso_buf += 8;
/* This marks a new frame */
if (fb->v4lbuf.bytesused != 0
&& fb->v4lbuf.bytesused != dev->frame_size) {
(void) (printk_ratelimit() &&
STK_ERROR("frame %d, "
"bytesused=%d, skipping\n",
i, fb->v4lbuf.bytesused));
fb->v4lbuf.bytesused = 0;
fill = fb->buffer;
} else if (fb->v4lbuf.bytesused == dev->frame_size) {
if (list_is_singular(&dev->sio_avail)) {
/* Always reuse the last buffer */
fb->v4lbuf.bytesused = 0;
fill = fb->buffer;
} else {
list_move_tail(dev->sio_avail.next,
&dev->sio_full);
wake_up(&dev->wait_frame);
fb = list_first_entry(&dev->sio_avail,
struct stk_sio_buffer, list);
fb->v4lbuf.bytesused = 0;
fill = fb->buffer;
}
}
} else {
