static void
sclp_conbuf_callback(struct sclp_buffer *buffer, int rc)
{
unsigned long flags;
void *page;
do {
page = sclp_unmake_buffer(buffer);
spin_lock_irqsave(&sclp_con_lock, flags);
/* */
list_del(&buffer->list);
list_add_tail((struct list_head *) page, &sclp_con_pages);
/* */
buffer = NULL;
if (!list_empty(&sclp_con_outqueue))
buffer = list_first_entry(&sclp_con_outqueue,
struct sclp_buffer, list);
if (!buffer || sclp_con_suspended) {
sclp_con_queue_running = 0;
spin_unlock_irqrestore(&sclp_con_lock, flags);
break;
}
spin_unlock_irqrestore(&sclp_con_lock, flags);
} while (sclp_emit_buffer(buffer, sclp_conbuf_callback));
}
static void
sclp_conbuf_callback(struct sclp_buffer *buffer, int rc)
{
unsigned long flags;
void *page;
do {
page = sclp_unmake_buffer(buffer);
spin_lock_irqsave(&sclp_con_lock, flags);
/* Remove buffer from outqueue */
list_del(&buffer->list);
sclp_con_buffer_count--;
list_add_tail((struct list_head *) page, &sclp_con_pages);
/* Check if there is a pending buffer on the out queue. */
buffer = NULL;
if (!list_empty(&sclp_con_outqueue))
buffer = list_entry(sclp_con_outqueue.next,
struct sclp_buffer, list);
spin_unlock_irqrestore(&sclp_con_lock, flags);
} while (buffer && sclp_emit_buffer(buffer, sclp_conbuf_callback));
}
/*
* Drop oldest console buffer if sclp_con_drop is set
*/
static int
sclp_console_drop_buffer(void)
{
struct list_head *list;
struct sclp_buffer *buffer;
void *page;
if (!sclp_console_drop)
return 0;
list = sclp_con_outqueue.next;
if (sclp_con_queue_running)
/* The first element is in I/O */
list = list->next;
if (list == &sclp_con_outqueue)
return 0;
list_del(list);
buffer = list_entry(list, struct sclp_buffer, list);
page = sclp_unmake_buffer(buffer);
list_add_tail((struct list_head *) page, &sclp_con_pages);
return 1;
}
