diff options
| author | Jiri Slaby (SUSE) <jirislaby@kernel.org> | 2025-08-14 09:24:43 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-08-17 12:46:25 +0200 |
| commit | 0fd60b689b0dacce659253ec15cb3d3bf660e30b (patch) | |
| tree | bbeb12cafee4454a988cfedf3e2a75075252c3ba | |
| parent | e8398b8aed50382c21fcec77e80a5314e7c45c25 (diff) | |
serial: introduce uart_port_lock() guard()s
Having this, guards like these work:
guard(uart_port_lock_irq)(&up->port);
or
scoped_guard(uart_port_lock_irqsave, port) {
...
}
See e.g. "serial: 8250: use guard()s" later in this series.
Signed-off-by: "Jiri Slaby (SUSE)" <jirislaby@kernel.org>
Link: https://lore.kernel.org/r/20250814072456.182853-4-jirislaby@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | include/linux/serial_core.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h index 84b4648ead7e..666430b47899 100644 --- a/include/linux/serial_core.h +++ b/include/linux/serial_core.h @@ -788,6 +788,19 @@ static inline void uart_port_unlock_irqrestore(struct uart_port *up, unsigned lo spin_unlock_irqrestore(&up->lock, flags); } +DEFINE_GUARD(uart_port_lock, struct uart_port *, uart_port_lock(_T), uart_port_unlock(_T)); +DEFINE_GUARD_COND(uart_port_lock, _try, uart_port_trylock(_T)); + +DEFINE_GUARD(uart_port_lock_irq, struct uart_port *, uart_port_lock_irq(_T), + uart_port_unlock_irq(_T)); + +DEFINE_LOCK_GUARD_1(uart_port_lock_irqsave, struct uart_port, + uart_port_lock_irqsave(_T->lock, &_T->flags), + uart_port_unlock_irqrestore(_T->lock, _T->flags), + unsigned long flags); +DEFINE_LOCK_GUARD_1_COND(uart_port_lock_irqsave, _try, + uart_port_trylock_irqsave(_T->lock, &_T->flags)); + static inline int serial_port_in(struct uart_port *up, int offset) { return up->serial_in(up, offset); |