tty_write_room identifier - Linux source code next-20260811

Projects

linux

Versions

FIXME
- FIXME
  - next-20260811

Documented in 1 files:

drivers/tty/tty_ioctl.c, line 56

Defined in 1 files as a prototype:

include/linux/tty.h, line 410 (as a prototype)

Defined in 1 files as a function:

drivers/tty/tty_ioctl.c, line 66 (as a function)

Referenced in 4 files:

Smatch caller information:

drivers/tty/n_gsm.c gsmld_output() -> tty_write_room()

Type	Parameter	Key	Value
PARAM_VALUE	0	tty	4096-ptr_max
PREEMPT_ADD
LOCK2		&gsm->tx_lock
LOCK2		flags
HALF_LOCKED2		&pool->lock
TYPE_LOCK		(struct gsm_mux)->tx_lock

drivers/tty/n_gsm.c gsmld_poll() -> tty_write_room()

Type	Parameter	Key	Value
PARAM_VALUE	0	tty	4096-ptr_max
PARAM_VALUE	0	tty->disc_data	4096-ptr_max
PARAM_VALUE	0	tty->ldisc	1-u64max
PARAM_VALUE	0	tty->ldisc_sem.dep_map->name	0-255
PARAM_VALUE	0	tty->ldisc_sem.read_wait.next	4096-ptr_max
PARAM_VALUE	0	tty->ldisc_sem.read_wait.next->next	4096-ptr_max
PARAM_VALUE	0	tty->ldisc_sem.read_wait.prev	4096-ptr_max
PARAM_VALUE	0	tty->ldisc_sem.read_wait.prev->next	4096-ptr_max
PARAM_VALUE	0	tty->ldisc_sem.read_wait.prev->next->next	4096-ptr_max
PARAM_VALUE	0	tty->ldisc_sem.read_wait.prev->prev	4096-ptr_max
PARAM_VALUE	0	tty->read_wait.head.next->next	4096-ptr_max
PARAM_VALUE	0	tty->read_wait.head.next->prev	4096-ptr_max
PARAM_VALUE	0	tty->read_wait.head.prev->next	4096-ptr_max
PARAM_VALUE	0	tty->read_wait.head.prev->next->next	4096-ptr_max
PARAM_VALUE	0	tty->read_wait.lock.rlock.dep_map->name	0-255
PARAM_VALUE	0	tty->write_wait.head.next->next	4096-ptr_max
PARAM_VALUE	0	tty->write_wait.head.next->prev	4096-ptr_max
PARAM_VALUE	0	tty->write_wait.head.prev->next	4096-ptr_max
PARAM_VALUE	0	tty->write_wait.head.prev->next->next	4096-ptr_max
PARAM_VALUE	0	tty->write_wait.lock.rlock.dep_map->name	0-255
DATA_SOURCE	0	tty	$0
RX_PATH
TASK_NOT_RUNNING
LOCK2	0	&tty->ldisc_sem
HALF_LOCKED2		&kvm->irq_srcu
HALF_LOCKED2		&of->mutex
HALF_LOCKED2		&vm->irqfds_lock
HALF_LOCKED2		global &irqfds_srcu
TYPE_LOCK		(struct tty_struct)->ldisc_sem

drivers/tty/n_gsm.c gsmld_write() -> tty_write_room()

Type	Parameter	Key	Value
PARAM_VALUE	0	tty	4096-ptr_max
PARAM_VALUE	0	tty->atomic_write_lock.dep_map->name	0-255
PARAM_VALUE	0	tty->atomic_write_lock.first_waiter	0,4096-ptr_max
PARAM_VALUE	0	tty->atomic_write_lock.first_waiter->list.prev->next	5159360019465732096
PARAM_VALUE	0	tty->atomic_write_lock.osq.tail.counter	0-s32max
PARAM_VALUE	0	tty->disc_data	1-u64max
PARAM_VALUE	0	tty->ldisc	1-u64max
PARAM_VALUE	0	tty->ldisc_sem.dep_map->name	0-255
PARAM_VALUE	0	tty->ldisc_sem.read_wait.next	4096-ptr_max
PARAM_VALUE	0	tty->ldisc_sem.read_wait.next->next	4096-ptr_max
PARAM_VALUE	0	tty->ldisc_sem.read_wait.prev	4096-ptr_max
PARAM_VALUE	0	tty->ldisc_sem.read_wait.prev->next	4096-ptr_max
PARAM_VALUE	0	tty->ldisc_sem.read_wait.prev->next->next	4096-ptr_max
PARAM_VALUE	0	tty->ldisc_sem.read_wait.prev->prev	4096-ptr_max
PARAM_VALUE	0	tty->ops	4096-ptr_max
PARAM_VALUE	0	tty->ops->write	4096-ptr_max
PARAM_VALUE	0	tty->ops->write_room	0,4096-ptr_max
PARAM_VALUE	0	tty->termios_rwsem.first_waiter->handoff_set	0-1
PARAM_VALUE	0	tty->termios_rwsem.first_waiter->type	0-1
BUF_SIZE	0	tty->write_buf	(-1),1024-65536
CAPPED_DATA	0	tty	1
DATA_SOURCE	0	tty	$0
PREEMPT_ADD			<- disables preempt
RX_PATH
TASK_NOT_RUNNING
USER_DATA	0	tty->write_cnt	1025-u16max[c]
LOCK2		&gsm->tx_lock
LOCK2		flags
LOCK2	0	&tty->atomic_write_lock
LOCK2	0	&tty->ldisc_sem
HALF_LOCKED2		&pool->lock
TYPE_LOCK		(struct gsm_mux)->tx_lock
TYPE_LOCK		(struct tty_struct)->atomic_write_lock
TYPE_LOCK		(struct tty_struct)->ldisc_sem

drivers/accessibility/speakup/spk_ttyio.c spk_ttyio_synth_immediate() -> tty_write_room()

Type	Parameter	Key	Value
PARAM_VALUE	0	tty	0,4096-ptr_max
PARAM_VALUE	0	tty->ops->write_room	0,4096-ptr_max
BUF_SIZE	0	tty	1816
RX_PATH
TASK_NOT_RUNNING
LOCK2		global &spk_mutex

drivers/tty/n_tty.c __process_echoes() -> tty_write_room()

Type	Parameter	Key	Value
PARAM_VALUE	0	tty	4096-ptr_max
PARAM_VALUE	0	tty->disc_data	4096-ptr_max
PARAM_VALUE	0	tty->link->termios_rwsem.first_waiter->handoff_set	0-1
PARAM_VALUE	0	tty->link->termios_rwsem.first_waiter->type	0-1
PARAM_VALUE	0	tty->ops->break_ctl	0,4096-ptr_max
PARAM_VALUE	0	tty->ops->chars_in_buffer	0,4096-ptr_max
PARAM_VALUE	0	tty->ops->cleanup	0,4096-ptr_max
PARAM_VALUE	0	tty->ops->close	0,4096-ptr_max
PARAM_VALUE	0	tty->ops->compat_ioctl	0,1607379221601308672,5008286898947497984,6364353445524312064
PARAM_VALUE	0	tty->ops->flush_buffer	0,759512161776693248,1438963212235436032,3037852187181395968,3356400052838694912,4884767172415688704,8736245651927326720,8787202642060013568
PARAM_VALUE	0	tty->ops->flush_chars	0,4096-ptr_max
PARAM_VALUE	0	tty->ops->get_icount	0,4096-ptr_max
PARAM_VALUE	0	tty->ops->get_serial	0,4096-ptr_max
PARAM_VALUE	0	tty->ops->hangup	0,4096-ptr_max
PARAM_VALUE	0	tty->ops->install	0,4096-ptr_max
PARAM_VALUE	0	tty->ops->ioctl	0,4096-ptr_max
PARAM_VALUE	0	tty->ops->ldisc_ok	0,6843386834578624512
PARAM_VALUE	0	tty->ops->lookup	0,4096-ptr_max
PARAM_VALUE	0	tty->ops->open	0,4096-ptr_max
PARAM_VALUE	0	tty->ops->poll_get_char	0,4172584550987694080,8810588628199956480
PARAM_VALUE	0	tty->ops->poll_init	0,1455831725284642816,7005422354281586688
PARAM_VALUE	0	tty->ops->poll_put_char	0,317088091350007808,4944462343817641984
PARAM_VALUE	0	tty->ops->proc_show	0,356236415985979392,5729891321464528896,9011853526131630080
PARAM_VALUE	0	tty->ops->put_char	0,46317935159074816,946511232463630336,5234932001147445248,6499862429192966144,7134038662404317184
PARAM_VALUE	0	tty->ops->remove	0,384629141214146560,3489019467251376128
PARAM_VALUE	0	tty->ops->resize	0,2815742157479378944,7598537204212207616
PARAM_VALUE	0	tty->ops->send_xchar	0,2462859047340216320,4708555404674125824,8710759130855649280
PARAM_VALUE	0	tty->ops->set_ldisc	0,1741587377620623360
PARAM_VALUE	0	tty->ops->set_serial	0,4096-ptr_max
PARAM_VALUE	0	tty->ops->set_termios	0,4096-ptr_max
PARAM_VALUE	0	tty->ops->show_fdinfo	0,5525676422896762880
PARAM_VALUE	0	tty->ops->shutdown	0,3518621193109893120,5469287042401259520
PARAM_VALUE	0	tty->ops->start	0,251324532200828928,1038803386632884224,1167599979921588224,1380472159287435264,2505730045728698368
PARAM_VALUE	0	tty->ops->stop	0,4096-ptr_max
PARAM_VALUE	0	tty->ops->throttle	0,4096-ptr_max
PARAM_VALUE	0	tty->ops->tiocmget	0,4096-ptr_max
PARAM_VALUE	0	tty->ops->tiocmset	0,4096-ptr_max
PARAM_VALUE	0	tty->ops->unthrottle	0,4096-ptr_max
PARAM_VALUE	0	tty->ops->wait_until_sent	0,2578158375326154752,2614800216018440192,6874988682411192320,7074827580452507648,7916194843820081152
PARAM_VALUE	0	tty->ops->write	0,4096-ptr_max
PARAM_VALUE	0	tty->ops->write_room	0,4096-ptr_max
PARAM_VALUE	0	tty->termios_rwsem.first_waiter->handoff_set	0-1
PARAM_VALUE	0	tty->termios_rwsem.first_waiter->type	0-1
BUF_SIZE	0	tty	s32min,(-1),1-s32max
BUF_SIZE	0	tty	s32min,(-1),1-s32max
BUF_SIZE	0	tty->write_buf	(-1),1024-65536
CAPPED_DATA	0	tty	1
DATA_SOURCE	0	tty	$0
RX_PATH
TASK_NOT_RUNNING
USER_DATA	0	tty->termios.c_cflag	0-u32max[c]
USER_DATA	0	tty->termios.c_iflag	0-u32max[c]
USER_DATA	0	tty->termios.c_ispeed	0-u32max
USER_DATA	0	tty->termios.c_lflag	0-u32max[c]
USER_DATA	0	tty->termios.c_line	0-255
USER_DATA	0	tty->termios.c_oflag	0-u32max[c]
USER_DATA	0	tty->termios.c_ospeed	0-u32max
USER_DATA	0	tty->write_cnt	1025-u16max[c]
NO_OVERFLOW_SIMPLE	0	tty->driver_data->d_fsdata
NO_OVERFLOW_SIMPLE	0	tty->driver_data->d_fsdata->d_fsdata
NO_OVERFLOW_SIMPLE	0	tty->name
USER_PTR	0	tty->disc_data->priv->rx_skb->data
LOCK2		_T->lock
HALF_LOCKED2	0	&tty->atomic_write_lock
HALF_LOCKED2	0	&tty->ldisc_sem
HALF_LOCKED2	0	&tty->legacy_mutex
HALF_LOCKED2	0	&tty->port->buf.lock
HALF_LOCKED2	0	&tty->termios_rwsem

drivers/tty/n_tty.c n_tty_poll() -> tty_write_room()

Type	Parameter	Key	Value
PARAM_VALUE	0	tty	4096-ptr_max
PARAM_VALUE	0	tty->disc_data	4096-ptr_max
PARAM_VALUE	0	tty->ldisc	1-u64max
PARAM_VALUE	0	tty->ldisc_sem.dep_map->name	0-255
PARAM_VALUE	0	tty->ldisc_sem.read_wait.next	4096-ptr_max
PARAM_VALUE	0	tty->ldisc_sem.read_wait.next->next	4096-ptr_max
PARAM_VALUE	0	tty->ldisc_sem.read_wait.prev	4096-ptr_max
PARAM_VALUE	0	tty->ldisc_sem.read_wait.prev->next	4096-ptr_max
PARAM_VALUE	0	tty->ldisc_sem.read_wait.prev->next->next	4096-ptr_max
PARAM_VALUE	0	tty->ldisc_sem.read_wait.prev->prev	4096-ptr_max
PARAM_VALUE	0	tty->link	4096-ptr_max
PARAM_VALUE	0	tty->ops	4096-ptr_max
PARAM_VALUE	0	tty->ops->write	4096-ptr_max
PARAM_VALUE	0	tty->port->buf.work.lockdep_map->name	0-255
PARAM_VALUE	0	tty->read_wait.head.next->next	4096-ptr_max
PARAM_VALUE	0	tty->read_wait.head.next->prev	4096-ptr_max
PARAM_VALUE	0	tty->read_wait.head.prev->next	4096-ptr_max
PARAM_VALUE	0	tty->read_wait.head.prev->next->next	4096-ptr_max
PARAM_VALUE	0	tty->read_wait.lock.rlock.dep_map->name	0-255
PARAM_VALUE	0	tty->write_wait.head.next->next	4096-ptr_max
PARAM_VALUE	0	tty->write_wait.head.next->prev	4096-ptr_max
PARAM_VALUE	0	tty->write_wait.head.prev->next	4096-ptr_max
PARAM_VALUE	0	tty->write_wait.head.prev->next->next	4096-ptr_max
PARAM_VALUE	0	tty->write_wait.lock.rlock.dep_map->name	0-255
DATA_SOURCE	0	tty	$0
RX_PATH
TASK_NOT_RUNNING
LOCK2	0	&tty->ldisc_sem
HALF_LOCKED2		&kvm->irq_srcu
HALF_LOCKED2		&of->mutex
HALF_LOCKED2		&vm->irqfds_lock
HALF_LOCKED2		global &irqfds_srcu
TYPE_LOCK		(struct tty_struct)->ldisc_sem

drivers/tty/n_tty.c process_output() -> tty_write_room()

Type	Parameter	Key	Value
PARAM_VALUE	0	tty	4096-ptr_max
PARAM_VALUE	0	tty->atomic_write_lock.dep_map->name	0-255
PARAM_VALUE	0	tty->atomic_write_lock.first_waiter->list.prev->next	5159360019465732096
PARAM_VALUE	0	tty->atomic_write_lock.first_waiter->list.prev->prev	5159360019465732096
PARAM_VALUE	0	tty->disc_data	4096-ptr_max
PARAM_VALUE	0	tty->ldisc_sem.dep_map->name	0-255
PARAM_VALUE	0	tty->ldisc_sem.read_wait.next->next	4096-ptr_max
PARAM_VALUE	0	tty->ldisc_sem.read_wait.prev->next	4096-ptr_max
PARAM_VALUE	0	tty->ldisc_sem.read_wait.prev->next->next	4096-ptr_max
PARAM_VALUE	0	tty->ldisc_sem.read_wait.prev->prev	4096-ptr_max
PARAM_VALUE	0	tty->ops	4096-ptr_max
PARAM_VALUE	0	tty->ops->flush_chars	0,4096-ptr_max
PARAM_VALUE	0	tty->ops->write	4096-ptr_max
PARAM_VALUE	0	tty->ops->write_room	0,4096-ptr_max
PARAM_VALUE	0	tty->termios_rwsem.first_waiter->handoff_set	0-1
PARAM_VALUE	0	tty->termios_rwsem.first_waiter->type	0-1
PARAM_VALUE	0	tty->write_wait.lock.rlock.dep_map->name	0-255
BUF_SIZE	0	tty->write_buf	(-1),1024-65536
CAPPED_DATA	0	tty	1
DATA_SOURCE	0	tty	$1
BIT_INFO	0	tty->termios.c_oflag	0x1,0xffffffffffffffff
RX_PATH
TASK_NOT_RUNNING
USER_DATA	0	tty->write_cnt	1025-u16max[c]
LOCK2		_T->lock
LOCK2	0	&tty->atomic_write_lock
LOCK2	0	&tty->ldisc_sem
HALF_LOCKED2		&pool->lock
HALF_LOCKED2	0	&tty->termios_rwsem
TYPE_LOCK		(struct tty_struct)->atomic_write_lock
TYPE_LOCK		(struct tty_struct)->ldisc_sem

drivers/tty/n_tty.c process_output_block() -> tty_write_room()

Type	Parameter	Key	Value
PARAM_VALUE	0	tty	4096-ptr_max
PARAM_VALUE	0	tty->atomic_write_lock.dep_map->name	0-255
PARAM_VALUE	0	tty->atomic_write_lock.first_waiter->list.prev->next	5159360019465732096
PARAM_VALUE	0	tty->atomic_write_lock.first_waiter->list.prev->prev	5159360019465732096
PARAM_VALUE	0	tty->ldisc_sem.dep_map->name	0-255
PARAM_VALUE	0	tty->ldisc_sem.read_wait.next->next	4096-ptr_max
PARAM_VALUE	0	tty->ldisc_sem.read_wait.prev->next	4096-ptr_max
PARAM_VALUE	0	tty->ldisc_sem.read_wait.prev->next->next	4096-ptr_max
PARAM_VALUE	0	tty->ldisc_sem.read_wait.prev->prev	4096-ptr_max
PARAM_VALUE	0	tty->ops->flush_chars	0,4096-ptr_max
PARAM_VALUE	0	tty->ops->write	4096-ptr_max
PARAM_VALUE	0	tty->ops->write_room	0,4096-ptr_max
PARAM_VALUE	0	tty->termios_rwsem.first_waiter->handoff_set	0-1
PARAM_VALUE	0	tty->termios_rwsem.first_waiter->type	0-1
PARAM_VALUE	0	tty->write_wait.lock.rlock.dep_map->name	0-255
BUF_SIZE	0	tty->write_buf	(-1),1024-65536
CAPPED_DATA	0	tty	1
DATA_SOURCE	0	tty	$0
RX_PATH
TASK_NOT_RUNNING
USER_DATA	0	tty->write_cnt	1025-u16max[c]
LOCK2		_T->lock
LOCK2	0	&tty->atomic_write_lock
LOCK2	0	&tty->ldisc_sem
HALF_LOCKED2		&pool->lock
HALF_LOCKED2	0	&tty->termios_rwsem
TYPE_LOCK		(struct tty_struct)->atomic_write_lock
TYPE_LOCK		(struct tty_struct)->ldisc_sem