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, 149 insertions, 0 deletions

diff --git a/debian/patches-rt/0065-serial-sunhv-Use-port-lock-wrappers.patch b/debian/patches-rt/0065-serial-sunhv-Use-port-lock-wrappers.patch
new file mode 100644
index 0000000000..beacd2be79
--- /dev/null
+++ b/debian/patches-rt/0065-serial-sunhv-Use-port-lock-wrappers.patch
@@ -0,0 +1,149 @@
+From: Thomas Gleixner <tglx@linutronix.de>
+Date: Thu, 14 Sep 2023 20:44:22 +0206
+Subject: [PATCH 065/134] serial: sunhv: 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/20230914183831.587273-66-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/sunhv.c |   28 ++++++++++++++--------------
+ 1 file changed, 14 insertions(+), 14 deletions(-)
+
+--- a/drivers/tty/serial/sunhv.c
++++ b/drivers/tty/serial/sunhv.c
+@@ -217,10 +217,10 @@ static irqreturn_t sunhv_interrupt(int i
+ 	struct tty_port *tport;
+ 	unsigned long flags;
+ 
+-	spin_lock_irqsave(&port->lock, flags);
++	uart_port_lock_irqsave(port, &flags);
+ 	tport = receive_chars(port);
+ 	transmit_chars(port);
+-	spin_unlock_irqrestore(&port->lock, flags);
++	uart_port_unlock_irqrestore(port, flags);
+ 
+ 	if (tport)
+ 		tty_flip_buffer_push(tport);
+@@ -271,7 +271,7 @@ static void sunhv_send_xchar(struct uart
+ 	if (ch == __DISABLED_CHAR)
+ 		return;
+ 
+-	spin_lock_irqsave(&port->lock, flags);
++	uart_port_lock_irqsave(port, &flags);
+ 
+ 	while (limit-- > 0) {
+ 		long status = sun4v_con_putchar(ch);
+@@ -280,7 +280,7 @@ static void sunhv_send_xchar(struct uart
+ 		udelay(1);
+ 	}
+ 
+-	spin_unlock_irqrestore(&port->lock, flags);
++	uart_port_unlock_irqrestore(port, flags);
+ }
+ 
+ /* port->lock held by caller.  */
+@@ -295,7 +295,7 @@ static void sunhv_break_ctl(struct uart_
+ 		unsigned long flags;
+ 		int limit = 10000;
+ 
+-		spin_lock_irqsave(&port->lock, flags);
++		uart_port_lock_irqsave(port, &flags);
+ 
+ 		while (limit-- > 0) {
+ 			long status = sun4v_con_putchar(CON_BREAK);
+@@ -304,7 +304,7 @@ static void sunhv_break_ctl(struct uart_
+ 			udelay(1);
+ 		}
+ 
+-		spin_unlock_irqrestore(&port->lock, flags);
++		uart_port_unlock_irqrestore(port, flags);
+ 	}
+ }
+ 
+@@ -328,7 +328,7 @@ static void sunhv_set_termios(struct uar
+ 	unsigned int iflag, cflag;
+ 	unsigned long flags;
+ 
+-	spin_lock_irqsave(&port->lock, flags);
++	uart_port_lock_irqsave(port, &flags);
+ 
+ 	iflag = termios->c_iflag;
+ 	cflag = termios->c_cflag;
+@@ -343,7 +343,7 @@ static void sunhv_set_termios(struct uar
+ 	uart_update_timeout(port, cflag,
+ 			    (port->uartclk / (16 * quot)));
+ 
+-	spin_unlock_irqrestore(&port->lock, flags);
++	uart_port_unlock_irqrestore(port, flags);
+ }
+ 
+ static const char *sunhv_type(struct uart_port *port)
+@@ -437,9 +437,9 @@ static void sunhv_console_write_paged(st
+ 	int locked = 1;
+ 
+ 	if (port->sysrq || oops_in_progress)
+-		locked = spin_trylock_irqsave(&port->lock, flags);
++		locked = uart_port_trylock_irqsave(port, &flags);
+ 	else
+-		spin_lock_irqsave(&port->lock, flags);
++		uart_port_lock_irqsave(port, &flags);
+ 
+ 	while (n > 0) {
+ 		unsigned long ra = __pa(con_write_page);
+@@ -470,7 +470,7 @@ static void sunhv_console_write_paged(st
+ 	}
+ 
+ 	if (locked)
+-		spin_unlock_irqrestore(&port->lock, flags);
++		uart_port_unlock_irqrestore(port, flags);
+ }
+ 
+ static inline void sunhv_console_putchar(struct uart_port *port, char c)
+@@ -492,9 +492,9 @@ static void sunhv_console_write_bychar(s
+ 	int i, locked = 1;
+ 
+ 	if (port->sysrq || oops_in_progress)
+-		locked = spin_trylock_irqsave(&port->lock, flags);
++		locked = uart_port_trylock_irqsave(port, &flags);
+ 	else
+-		spin_lock_irqsave(&port->lock, flags);
++		uart_port_lock_irqsave(port, &flags);
+ 
+ 	for (i = 0; i < n; i++) {
+ 		if (*s == '\n')
+@@ -503,7 +503,7 @@ static void sunhv_console_write_bychar(s
+ 	}
+ 
+ 	if (locked)
+-		spin_unlock_irqrestore(&port->lock, flags);
++		uart_port_unlock_irqrestore(port, flags);
+ }
+ 
+ static struct console sunhv_console = {