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-rw-r--r--debian/patches-rt/0061-serial-sifive-Use-port-lock-wrappers.patch102
1 files changed, 0 insertions, 102 deletions
diff --git a/debian/patches-rt/0061-serial-sifive-Use-port-lock-wrappers.patch b/debian/patches-rt/0061-serial-sifive-Use-port-lock-wrappers.patch
deleted file mode 100644
index a2babdbea9..0000000000
--- a/debian/patches-rt/0061-serial-sifive-Use-port-lock-wrappers.patch
+++ /dev/null
@@ -1,102 +0,0 @@
-From: Thomas Gleixner <tglx@linutronix.de>
-Date: Thu, 14 Sep 2023 20:44:18 +0206
-Subject: [PATCH 061/134] serial: sifive: Use port lock wrappers
-Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/6.6/older/patches-6.6.7-rt18.tar.xz
-
-When a serial port is used for kernel console output, then all
-modifications to the UART registers which are done from other contexts,
-e.g. getty, termios, are interference points for the kernel console.
-
-So far this has been ignored and the printk output is based on the
-principle of hope. The rework of the console infrastructure which aims to
-support threaded and atomic consoles, requires to mark sections which
-modify the UART registers as unsafe. This allows the atomic write function
-to make informed decisions and eventually to restore operational state. It
-also allows to prevent the regular UART code from modifying UART registers
-while printk output is in progress.
-
-All modifications of UART registers are guarded by the UART port lock,
-which provides an obvious synchronization point with the console
-infrastructure.
-
-To avoid adding this functionality to all UART drivers, wrap the
-spin_[un]lock*() invocations for uart_port::lock into helper functions
-which just contain the spin_[un]lock*() invocations for now. In a
-subsequent step these helpers will gain the console synchronization
-mechanisms.
-
-Converted with coccinelle. No functional change.
-
-Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
-Signed-off-by: John Ogness <john.ogness@linutronix.de>
-Link: https://lore.kernel.org/r/20230914183831.587273-62-john.ogness@linutronix.de
-Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
----
- drivers/tty/serial/sifive.c | 16 ++++++++--------
- 1 file changed, 8 insertions(+), 8 deletions(-)
-
---- a/drivers/tty/serial/sifive.c
-+++ b/drivers/tty/serial/sifive.c
-@@ -521,11 +521,11 @@ static irqreturn_t sifive_serial_irq(int
- struct sifive_serial_port *ssp = dev_id;
- u32 ip;
-
-- spin_lock(&ssp->port.lock);
-+ uart_port_lock(&ssp->port);
-
- ip = __ssp_readl(ssp, SIFIVE_SERIAL_IP_OFFS);
- if (!ip) {
-- spin_unlock(&ssp->port.lock);
-+ uart_port_unlock(&ssp->port);
- return IRQ_NONE;
- }
-
-@@ -534,7 +534,7 @@ static irqreturn_t sifive_serial_irq(int
- if (ip & SIFIVE_SERIAL_IP_TXWM_MASK)
- __ssp_transmit_chars(ssp);
-
-- spin_unlock(&ssp->port.lock);
-+ uart_port_unlock(&ssp->port);
-
- return IRQ_HANDLED;
- }
-@@ -653,7 +653,7 @@ static void sifive_serial_set_termios(st
- ssp->port.uartclk / 16);
- __ssp_update_baud_rate(ssp, rate);
-
-- spin_lock_irqsave(&ssp->port.lock, flags);
-+ uart_port_lock_irqsave(&ssp->port, &flags);
-
- /* Update the per-port timeout */
- uart_update_timeout(port, termios->c_cflag, rate);
-@@ -670,7 +670,7 @@ static void sifive_serial_set_termios(st
- if (v != old_v)
- __ssp_writel(v, SIFIVE_SERIAL_RXCTRL_OFFS, ssp);
-
-- spin_unlock_irqrestore(&ssp->port.lock, flags);
-+ uart_port_unlock_irqrestore(&ssp->port, flags);
- }
-
- static void sifive_serial_release_port(struct uart_port *port)
-@@ -795,9 +795,9 @@ static void sifive_serial_console_write(
- if (ssp->port.sysrq)
- locked = 0;
- else if (oops_in_progress)
-- locked = spin_trylock(&ssp->port.lock);
-+ locked = uart_port_trylock(&ssp->port);
- else
-- spin_lock(&ssp->port.lock);
-+ uart_port_lock(&ssp->port);
-
- ier = __ssp_readl(ssp, SIFIVE_SERIAL_IE_OFFS);
- __ssp_writel(0, SIFIVE_SERIAL_IE_OFFS, ssp);
-@@ -807,7 +807,7 @@ static void sifive_serial_console_write(
- __ssp_writel(ier, SIFIVE_SERIAL_IE_OFFS, ssp);
-
- if (locked)
-- spin_unlock(&ssp->port.lock);
-+ uart_port_unlock(&ssp->port);
- local_irq_restore(flags);
- }
-