/**
* sht15_update_single_val() - get a new value from device
* @data: device instance specific data
* @command: command sent to request value
* @timeout_msecs: timeout after which comms are assumed
* to have failed are reset.
**/
static inline int sht15_update_single_val(struct sht15_data *data,
int command,
int timeout_msecs)
{
int ret;
ret = sht15_send_cmd(data, command);
if (ret)
return ret;
gpio_direction_input(data->pdata->gpio_data);
atomic_set_unchecked(&data->interrupt_handled, 0);
enable_irq(gpio_to_irq(data->pdata->gpio_data));
if (gpio_get_value(data->pdata->gpio_data) == 0) {
disable_irq_nosync(gpio_to_irq(data->pdata->gpio_data));
/* Only relevant if the interrupt hasn't occurred. */
if (!atomic_read_unchecked(&data->interrupt_handled))
schedule_work(&data->read_work);
}
ret = wait_event_timeout(data->wait_queue,
(data->flag == SHT15_READING_NOTHING),
msecs_to_jiffies(timeout_msecs));
if (ret == 0) {/* timeout occurred */
disable_irq_nosync(gpio_to_irq(data->pdata->gpio_data));
sht15_connection_reset(data);
return -ETIME;
}
return 0;
}
static int lis3lv02d_misc_open(struct inode *inode, struct file *file)
{
if (test_and_set_bit(0, &lis3_dev.misc_opened))
return -EBUSY; /* already open */
if (lis3_dev.pm_dev)
pm_runtime_get_sync(lis3_dev.pm_dev);
atomic_set_unchecked(&lis3_dev.count, 0);
return 0;
}
static int uPD98402_start(struct atm_dev *dev)
{
DPRINTK("phy_start\n");
if (!(dev->dev_data = kmalloc(sizeof(struct uPD98402_priv),GFP_KERNEL)))
return -ENOMEM;
spin_lock_init(&PRIV(dev)->lock);
memset(&PRIV(dev)->sonet_stats,0,sizeof(struct k_sonet_stats));
(void) GET(PCR); /* clear performance events */
PUT(uPD98402_PFM_FJ,PCMR); /* ignore frequency adj */
(void) GET(PCOCR); /* clear overflows */
PUT(~uPD98402_PCO_HECC,PCOMR);
(void) GET(PICR); /* clear interrupts */
PUT(~(uPD98402_INT_PFM | uPD98402_INT_ALM | uPD98402_INT_RFO |
uPD98402_INT_LOS),PIMR); /* enable them */
(void) fetch_stats(dev,NULL,1); /* clear kernel counters */
atomic_set_unchecked(&PRIV(dev)->sonet_stats.corr_hcs,-1);
atomic_set_unchecked(&PRIV(dev)->sonet_stats.tx_cells,-1);
atomic_set_unchecked(&PRIV(dev)->sonet_stats.rx_cells,-1);
return 0;
}
static int create_timed_output_class(void)
{
if (!timed_output_class) {
timed_output_class = class_create(THIS_MODULE, "timed_output");
if (IS_ERR(timed_output_class))
return PTR_ERR(timed_output_class);
atomic_set_unchecked(&device_count, 0);
timed_output_class->dev_groups = timed_output_groups;
}
return 0;
}
void init_smtc_stats(void)
{
int i;
for (i=0; i<NR_CPUS; i++) {
smtc_cpu_stats[i].timerints = 0;
smtc_cpu_stats[i].selfipis = 0;
}
atomic_set_unchecked(&smtc_fpu_recoveries, 0);
proc_create("smtc", 0444, NULL, &smtc_proc_fops);
}
static int statistic_mt_check(const struct xt_mtchk_param *par)
{
struct xt_statistic_info *info = par->matchinfo;
if (info->mode > XT_STATISTIC_MODE_MAX ||
info->flags & ~XT_STATISTIC_MASK)
return -EINVAL;
info->master = kzalloc(sizeof(*info->master), GFP_KERNEL);
if (info->master == NULL)
return -ENOMEM;
atomic_set_unchecked(&info->master->count, info->u.nth.count);
return 0;
}
static void sht15_bh_read_data(struct work_struct *work_s)
{
int i;
uint16_t val = 0;
struct sht15_data *data
= container_of(work_s, struct sht15_data,
read_work);
/* Firstly, verify the line is low */
if (gpio_get_value(data->pdata->gpio_data)) {
/* If not, then start the interrupt again - care
here as could have gone low in meantime so verify
it hasn't!
*/
atomic_set_unchecked(&data->interrupt_handled, 0);
enable_irq(gpio_to_irq(data->pdata->gpio_data));
/* If still not occurred or another handler has been scheduled */
if (gpio_get_value(data->pdata->gpio_data)
|| atomic_read_unchecked(&data->interrupt_handled))
return;
}
/* Read the data back from the device */
for (i = 0; i < 16; ++i) {
val <<= 1;
gpio_set_value(data->pdata->gpio_sck, 1);
ndelay(SHT15_TSCKH);
val |= !!gpio_get_value(data->pdata->gpio_data);
gpio_set_value(data->pdata->gpio_sck, 0);
ndelay(SHT15_TSCKL);
if (i == 7)
sht15_ack(data);
}
/* Tell the device we are done */
sht15_end_transmission(data);
switch (data->flag) {
case SHT15_READING_TEMP:
data->val_temp = val;
break;
case SHT15_READING_HUMID:
data->val_humid = val;
break;
}
data->flag = SHT15_READING_NOTHING;
wake_up(&data->wait_queue);
}
/**
* sysfs_get_open_dirent - get or create sysfs_open_dirent
* @sd: target sysfs_dirent
* @buffer: sysfs_buffer for this instance of open
*
* If @sd->s_attr.open exists, increment its reference count;
* otherwise, create one. @buffer is chained to the buffers
* list.
*
* LOCKING:
* Kernel thread context (may sleep).
*
* RETURNS:
* 0 on success, -errno on failure.
*/
static int sysfs_get_open_dirent(struct sysfs_dirent *sd,
struct sysfs_buffer *buffer)
{
struct sysfs_open_dirent *od, *new_od = NULL;
retry:
spin_lock_irq(&sysfs_open_dirent_lock);
if (!sd->s_attr.open && new_od) {
sd->s_attr.open = new_od;
new_od = NULL;
}
od = sd->s_attr.open;
if (od) {
atomic_inc(&od->refcnt);
list_add_tail(&buffer->list, &od->buffers);
}
spin_unlock_irq(&sysfs_open_dirent_lock);
if (od) {
kfree(new_od);
return 0;
}
/* not there, initialize a new one and retry */
new_od = kmalloc(sizeof(*new_od), GFP_KERNEL);
if (!new_od)
return -ENOMEM;
atomic_set(&new_od->refcnt, 0);
atomic_set_unchecked(&new_od->event, 1);
init_waitqueue_head(&new_od->poll);
INIT_LIST_HEAD(&new_od->buffers);
goto retry;
}
static int __init
init_cifs(void)
{
int rc = 0;
cifs_proc_init();
INIT_LIST_HEAD(&cifs_tcp_ses_list);
#ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */
INIT_LIST_HEAD(&GlobalDnotifyReqList);
INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
#endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
/*
* Initialize Global counters
*/
atomic_set(&sesInfoAllocCount, 0);
atomic_set(&tconInfoAllocCount, 0);
atomic_set(&tcpSesAllocCount, 0);
atomic_set(&tcpSesReconnectCount, 0);
atomic_set(&tconInfoReconnectCount, 0);
atomic_set(&bufAllocCount, 0);
atomic_set(&smBufAllocCount, 0);
#ifdef CONFIG_CIFS_STATS2
atomic_set_unchecked(&totBufAllocCount, 0);
atomic_set_unchecked(&totSmBufAllocCount, 0);
#endif /* CONFIG_CIFS_STATS2 */
atomic_set(&midCount, 0);
GlobalCurrentXid = 0;
GlobalTotalActiveXid = 0;
GlobalMaxActiveXid = 0;
spin_lock_init(&cifs_tcp_ses_lock);
spin_lock_init(&cifs_file_list_lock);
spin_lock_init(&GlobalMid_Lock);
if (cifs_max_pending < 2) {
cifs_max_pending = 2;
cifs_dbg(FYI, "cifs_max_pending set to min of 2\n");
} else if (cifs_max_pending > CIFS_MAX_REQ) {
cifs_max_pending = CIFS_MAX_REQ;
cifs_dbg(FYI, "cifs_max_pending set to max of %u\n",
CIFS_MAX_REQ);
}
cifsiod_wq = alloc_workqueue("cifsiod", WQ_FREEZABLE|WQ_MEM_RECLAIM, 0);
if (!cifsiod_wq) {
rc = -ENOMEM;
goto out_clean_proc;
}
rc = cifs_fscache_register();
if (rc)
goto out_destroy_wq;
rc = cifs_init_inodecache();
if (rc)
goto out_unreg_fscache;
rc = cifs_init_mids();
if (rc)
goto out_destroy_inodecache;
rc = cifs_init_request_bufs();
if (rc)
goto out_destroy_mids;
#ifdef CONFIG_CIFS_UPCALL
rc = register_key_type(&cifs_spnego_key_type);
if (rc)
goto out_destroy_request_bufs;
#endif /* CONFIG_CIFS_UPCALL */
#ifdef CONFIG_CIFS_ACL
rc = init_cifs_idmap();
if (rc)
goto out_register_key_type;
#endif /* CONFIG_CIFS_ACL */
rc = register_filesystem(&cifs_fs_type);
if (rc)
goto out_init_cifs_idmap;
return 0;
out_init_cifs_idmap:
#ifdef CONFIG_CIFS_ACL
exit_cifs_idmap();
out_register_key_type:
#endif
#ifdef CONFIG_CIFS_UPCALL
unregister_key_type(&cifs_spnego_key_type);
out_destroy_request_bufs:
#endif
cifs_destroy_request_bufs();
out_destroy_mids:
cifs_destroy_mids();
out_destroy_inodecache:
cifs_destroy_inodecache();
out_unreg_fscache:
cifs_fscache_unregister();
out_destroy_wq:
destroy_workqueue(cifsiod_wq);
out_clean_proc:
cifs_proc_clean();
return rc;
}
/**
* uio_register_device - register a new userspace IO device
* @owner: module that creates the new device
* @parent: parent device
* @info: UIO device capabilities
*
* returns zero on success or a negative error code.
*/
int __uio_register_device(struct module *owner,
struct device *parent,
struct uio_info *info)
{
struct uio_device *idev;
int ret = 0;
if (!parent || !info || !info->name || !info->version)
return -EINVAL;
info->uio_dev = NULL;
idev = kzalloc(sizeof(*idev), GFP_KERNEL);
if (!idev) {
ret = -ENOMEM;
goto err_kzalloc;
}
idev->owner = owner;
idev->info = info;
init_waitqueue_head(&idev->wait);
atomic_set_unchecked(&idev->event, 0);
ret = uio_get_minor(idev);
if (ret)
goto err_get_minor;
idev->dev = device_create(&uio_class, parent,
MKDEV(uio_major, idev->minor), idev,
"uio%d", idev->minor);
if (IS_ERR(idev->dev)) {
printk(KERN_ERR "UIO: device register failed\n");
ret = PTR_ERR(idev->dev);
goto err_device_create;
}
ret = uio_dev_add_attributes(idev);
if (ret)
goto err_uio_dev_add_attributes;
info->uio_dev = idev;
if (info->irq && (info->irq != UIO_IRQ_CUSTOM)) {
ret = request_irq(info->irq, uio_interrupt,
info->irq_flags, info->name, idev);
if (ret)
goto err_request_irq;
}
return 0;
err_request_irq:
uio_dev_del_attributes(idev);
err_uio_dev_add_attributes:
device_destroy(&uio_class, MKDEV(uio_major, idev->minor));
err_device_create:
uio_free_minor(idev);
err_get_minor:
kfree(idev);
err_kzalloc:
return ret;
}
static int handle_op(struct test_thread_data *td, int lockwakeup)
{
int i, id, ret = -EINVAL;
switch(td->opcode) {
case RTTEST_NOP:
return 0;
case RTTEST_LOCKCONT:
td->mutexes[td->opdata] = 1;
td->event = atomic_add_return_unchecked(1, &rttest_event);
return 0;
case RTTEST_RESET:
for (i = 0; i < MAX_RT_TEST_MUTEXES; i++) {
if (td->mutexes[i] == 4) {
rt_mutex_unlock(&mutexes[i]);
td->mutexes[i] = 0;
}
}
return 0;
case RTTEST_RESETEVENT:
atomic_set_unchecked(&rttest_event, 0);
return 0;
default:
if (lockwakeup)
return ret;
}
switch(td->opcode) {
case RTTEST_LOCK:
case RTTEST_LOCKNOWAIT:
id = td->opdata;
if (id < 0 || id >= MAX_RT_TEST_MUTEXES)
return ret;
td->mutexes[id] = 1;
td->event = atomic_add_return_unchecked(1, &rttest_event);
rt_mutex_lock(&mutexes[id]);
td->event = atomic_add_return_unchecked(1, &rttest_event);
td->mutexes[id] = 4;
return 0;
case RTTEST_LOCKINT:
case RTTEST_LOCKINTNOWAIT:
id = td->opdata;
if (id < 0 || id >= MAX_RT_TEST_MUTEXES)
return ret;
td->mutexes[id] = 1;
td->event = atomic_add_return_unchecked(1, &rttest_event);
ret = rt_mutex_lock_interruptible(&mutexes[id], 0);
td->event = atomic_add_return_unchecked(1, &rttest_event);
td->mutexes[id] = ret ? 0 : 4;
return ret ? -EINTR : 0;
case RTTEST_UNLOCK:
id = td->opdata;
if (id < 0 || id >= MAX_RT_TEST_MUTEXES || td->mutexes[id] != 4)
return ret;
td->event = atomic_add_return_unchecked(1, &rttest_event);
rt_mutex_unlock(&mutexes[id]);
td->event = atomic_add_return_unchecked(1, &rttest_event);
td->mutexes[id] = 0;
return 0;
default:
break;
}
return ret;
}
void synchronise_count_master(int cpu)
{
int i;
unsigned long flags;
printk(KERN_INFO "Synchronize counters for CPU %u: ", cpu);
local_irq_save(flags);
/*
* We loop a few times to get a primed instruction cache,
* then the last pass is more or less synchronised and
* the master and slaves each set their cycle counters to a known
* value all at once. This reduces the chance of having random offsets
* between the processors, and guarantees that the maximum
* delay between the cycle counters is never bigger than
* the latency of information-passing (cachelines) between
* two CPUs.
*/
for (i = 0; i < NR_LOOPS; i++) {
/* slaves loop on '!= 2' */
while (atomic_read_unchecked(&count_count_start) != 1)
mb();
atomic_set_unchecked(&count_count_stop, 0);
smp_wmb();
/* Let the slave writes its count register */
atomic_inc_unchecked(&count_count_start);
/* Count will be initialised to current timer */
if (i == 1)
initcount = read_c0_count();
/*
* Everyone initialises count in the last loop:
*/
if (i == NR_LOOPS-1)
write_c0_count(initcount);
/*
* Wait for slave to leave the synchronization point:
*/
while (atomic_read_unchecked(&count_count_stop) != 1)
mb();
atomic_set_unchecked(&count_count_start, 0);
smp_wmb();
atomic_inc_unchecked(&count_count_stop);
}
/* Arrange for an interrupt in a short while */
write_c0_compare(read_c0_count() + COUNTON);
local_irq_restore(flags);
/*
* i386 code reported the skew here, but the
* count registers were almost certainly out of sync
* so no point in alarming people
*/
printk("done.\n");
}
