Adding debian version 6.6.15-2.debian/6.6.15-2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 147 insertions, 0 deletions

diff --git a/debian/patches-rt/0044-serial-owl-Use-port-lock-wrappers.patch b/debian/patches-rt/0044-serial-owl-Use-port-lock-wrappers.patch
new file mode 100644
index 0000000000..fd8dc75013
--- /dev/null
+++ b/debian/patches-rt/0044-serial-owl-Use-port-lock-wrappers.patch
@@ -0,0 +1,147 @@
+From: Thomas Gleixner <tglx@linutronix.de>
+Date: Thu, 14 Sep 2023 20:44:01 +0206
+Subject: [PATCH 044/134] serial: owl: 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/20230914183831.587273-45-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/owl-uart.c |   26 +++++++++++++-------------
+ 1 file changed, 13 insertions(+), 13 deletions(-)
+
+--- a/drivers/tty/serial/owl-uart.c
++++ b/drivers/tty/serial/owl-uart.c
+@@ -125,12 +125,12 @@ static unsigned int owl_uart_tx_empty(st
+ 	u32 val;
+ 	unsigned int ret;
+ 
+-	spin_lock_irqsave(&port->lock, flags);
++	uart_port_lock_irqsave(port, &flags);
+ 
+ 	val = owl_uart_read(port, OWL_UART_STAT);
+ 	ret = (val & OWL_UART_STAT_TFES) ? TIOCSER_TEMT : 0;
+ 
+-	spin_unlock_irqrestore(&port->lock, flags);
++	uart_port_unlock_irqrestore(port, flags);
+ 
+ 	return ret;
+ }
+@@ -232,7 +232,7 @@ static irqreturn_t owl_uart_irq(int irq,
+ 	unsigned long flags;
+ 	u32 stat;
+ 
+-	spin_lock_irqsave(&port->lock, flags);
++	uart_port_lock_irqsave(port, &flags);
+ 
+ 	stat = owl_uart_read(port, OWL_UART_STAT);
+ 
+@@ -246,7 +246,7 @@ static irqreturn_t owl_uart_irq(int irq,
+ 	stat |= OWL_UART_STAT_RIP | OWL_UART_STAT_TIP;
+ 	owl_uart_write(port, stat, OWL_UART_STAT);
+ 
+-	spin_unlock_irqrestore(&port->lock, flags);
++	uart_port_unlock_irqrestore(port, flags);
+ 
+ 	return IRQ_HANDLED;
+ }
+@@ -256,14 +256,14 @@ static void owl_uart_shutdown(struct uar
+ 	u32 val;
+ 	unsigned long flags;
+ 
+-	spin_lock_irqsave(&port->lock, flags);
++	uart_port_lock_irqsave(port, &flags);
+ 
+ 	val = owl_uart_read(port, OWL_UART_CTL);
+ 	val &= ~(OWL_UART_CTL_TXIE | OWL_UART_CTL_RXIE
+ 		| OWL_UART_CTL_TXDE | OWL_UART_CTL_RXDE | OWL_UART_CTL_EN);
+ 	owl_uart_write(port, val, OWL_UART_CTL);
+ 
+-	spin_unlock_irqrestore(&port->lock, flags);
++	uart_port_unlock_irqrestore(port, flags);
+ 
+ 	free_irq(port->irq, port);
+ }
+@@ -279,7 +279,7 @@ static int owl_uart_startup(struct uart_
+ 	if (ret)
+ 		return ret;
+ 
+-	spin_lock_irqsave(&port->lock, flags);
++	uart_port_lock_irqsave(port, &flags);
+ 
+ 	val = owl_uart_read(port, OWL_UART_STAT);
+ 	val |= OWL_UART_STAT_RIP | OWL_UART_STAT_TIP
+@@ -291,7 +291,7 @@ static int owl_uart_startup(struct uart_
+ 	val |= OWL_UART_CTL_EN;
+ 	owl_uart_write(port, val, OWL_UART_CTL);
+ 
+-	spin_unlock_irqrestore(&port->lock, flags);
++	uart_port_unlock_irqrestore(port, flags);
+ 
+ 	return 0;
+ }
+@@ -311,7 +311,7 @@ static void owl_uart_set_termios(struct
+ 	u32 ctl;
+ 	unsigned long flags;
+ 
+-	spin_lock_irqsave(&port->lock, flags);
++	uart_port_lock_irqsave(port, &flags);
+ 
+ 	ctl = owl_uart_read(port, OWL_UART_CTL);
+ 
+@@ -371,7 +371,7 @@ static void owl_uart_set_termios(struct
+ 
+ 	uart_update_timeout(port, termios->c_cflag, baud);
+ 
+-	spin_unlock_irqrestore(&port->lock, flags);
++	uart_port_unlock_irqrestore(port, flags);
+ }
+ 
+ static void owl_uart_release_port(struct uart_port *port)
+@@ -515,9 +515,9 @@ static void owl_uart_port_write(struct u
+ 	if (port->sysrq)
+ 		locked = 0;
+ 	else if (oops_in_progress)
+-		locked = spin_trylock(&port->lock);
++		locked = uart_port_trylock(port);
+ 	else {
+-		spin_lock(&port->lock);
++		uart_port_lock(port);
+ 		locked = 1;
+ 	}
+ 
+@@ -541,7 +541,7 @@ static void owl_uart_port_write(struct u
+ 	owl_uart_write(port, old_ctl, OWL_UART_CTL);
+ 
+ 	if (locked)
+-		spin_unlock(&port->lock);
++		uart_port_unlock(port);
+ 
+ 	local_irq_restore(flags);
+ }