[All] {WIP} The big bump to buildroot 2024.02.x

2025-06-05 22:19:21 +02:00 · 2024-03-01 07:54:30 +00:00
parent 24a7b5beb1
commit aa79231bf0
239 changed files with 803 additions and 1351 deletions
--- a/buildroot-external/patches/linux/0068-serial-mvebu-uart-Use-port-lock-wrappers.patch
+++ b/buildroot-external/patches/linux/0068-serial-mvebu-uart-Use-port-lock-wrappers.patch
@ -0,0 +1,113 @@
+From 7ac7e384900ed2ffe0fe5a04265b366ce7238a3f Mon Sep 17 00:00:00 2001
+From: Thomas Gleixner <tglx@linutronix.de>
+Date: Thu, 14 Sep 2023 20:43:59 +0206
+Subject: [PATCH 068/196] serial: mvebu-uart: Use port lock wrappers
+
+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/20230914183831.587273-43-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/mvebu-uart.c | 18 +++++++++---------
+ 1 file changed, 9 insertions(+), 9 deletions(-)
+
+diff --git a/drivers/tty/serial/mvebu-uart.c b/drivers/tty/serial/mvebu-uart.c
+index ea924e9b913b..0255646bc175 100644
+--- a/drivers/tty/serial/mvebu-uart.c
+++ b/drivers/tty/serial/mvebu-uart.c
+@@ -187,9 +187,9 @@ static unsigned int mvebu_uart_tx_empty(struct uart_port *port)
+ 	unsigned long flags;
+ 	unsigned int st;
+ 
+-	spin_lock_irqsave(&port->lock, flags);
+	uart_port_lock_irqsave(port, &flags);
+ 	st = readl(port->membase + UART_STAT);
+-	spin_unlock_irqrestore(&port->lock, flags);
+	uart_port_unlock_irqrestore(port, flags);
+ 
+ 	return (st & STAT_TX_EMP) ? TIOCSER_TEMT : 0;
+ }
+@@ -249,14 +249,14 @@ static void mvebu_uart_break_ctl(struct uart_port *port, int brk)
+ 	unsigned int ctl;
+ 	unsigned long flags;
+ 
+-	spin_lock_irqsave(&port->lock, flags);
+	uart_port_lock_irqsave(port, &flags);
+ 	ctl = readl(port->membase + UART_CTRL(port));
+ 	if (brk == -1)
+ 		ctl |= CTRL_SND_BRK_SEQ;
+ 	else
+ 		ctl &= ~CTRL_SND_BRK_SEQ;
+ 	writel(ctl, port->membase + UART_CTRL(port));
+-	spin_unlock_irqrestore(&port->lock, flags);
+	uart_port_unlock_irqrestore(port, flags);
+ }
+ 
+ static void mvebu_uart_rx_chars(struct uart_port *port, unsigned int status)
+@@ -540,7 +540,7 @@ static void mvebu_uart_set_termios(struct uart_port *port,
+ 	unsigned long flags;
+ 	unsigned int baud, min_baud, max_baud;
+ 
+-	spin_lock_irqsave(&port->lock, flags);
+	uart_port_lock_irqsave(port, &flags);
+ 
+ 	port->read_status_mask = STAT_RX_RDY(port) | STAT_OVR_ERR |
+ 		STAT_TX_RDY(port) | STAT_TX_FIFO_FUL;
+@@ -589,7 +589,7 @@ static void mvebu_uart_set_termios(struct uart_port *port,
+ 		uart_update_timeout(port, termios->c_cflag, baud);
+ 	}
+ 
+-	spin_unlock_irqrestore(&port->lock, flags);
+	uart_port_unlock_irqrestore(port, flags);
+ }
+ 
+ static const char *mvebu_uart_type(struct uart_port *port)
+@@ -735,9 +735,9 @@ static void mvebu_uart_console_write(struct console *co, const char *s,
+ 	int locked = 1;
+ 
+ 	if (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);
+ 
+ 	ier = readl(port->membase + UART_CTRL(port)) & CTRL_BRK_INT;
+ 	intr = readl(port->membase + UART_INTR(port)) &
+@@ -758,7 +758,7 @@ static void mvebu_uart_console_write(struct console *co, const char *s,
+ 	}
+ 
+ 	if (locked)
+-		spin_unlock_irqrestore(&port->lock, flags);
+		uart_port_unlock_irqrestore(port, flags);
+ }
+ 
+ static int mvebu_uart_console_setup(struct console *co, char *options)
+-- 
+2.43.2
+