GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-06-21 22:21:21 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

tty: Replace ASYNC_INITIALIZED bit and update atomically

Browse source 
Replace ASYNC_INITIALIZED bit in the tty_port::flags field with
TTY_PORT_INITIALIZED bit in the tty_port::iflags field. Introduce helpers
tty_port_set_initialized() and tty_port_initialized() to abstract
atomic bit ops.

Note: the transforms for test_and_set_bit() and test_and_clear_bit()
are unnecessary as the state transitions are already mutually exclusive;
the tty lock prevents concurrent open/close/hangup.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Peter Hurley 2016-04-09 17:53:25 -07:00 • committed by Greg Kroah-Hartman
parent 80f02d5424
commit d41861ca19
27 changed files with 157 additions and 150 deletions
Download patch file Download diff file Expand all files Collapse all files

13
include/linux/tty.h
View file

@ -610,6 +610,19 @@ static inline void tty_port_set_suspended(struct tty_port *port, bool val)
clear_bit(TTY_PORT_SUSPENDED, &port->iflags);
}
static inline bool tty_port_initialized(struct tty_port *port)
{
return test_bit(TTY_PORT_INITIALIZED, &port->iflags);
}
static inline void tty_port_set_initialized(struct tty_port *port, bool val)
{
if (val)
set_bit(TTY_PORT_INITIALIZED, &port->iflags);
else
clear_bit(TTY_PORT_INITIALIZED, &port->iflags);
}
extern struct tty_struct *tty_port_tty_get(struct tty_port *port);
extern void tty_port_tty_set(struct tty_port *port, struct tty_struct *tty);
extern int tty_port_carrier_raised(struct tty_port *port);