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

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j1nx
2024-03-01 07:54:30 +00:00
parent 24a7b5beb1
commit aa79231bf0
239 changed files with 803 additions and 1351 deletions
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98
buildroot-external/patches/linux/0028-serial-core-Use-lock-wrappers.patch Normal file
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@ -0,0 +1,98 @@
From e20fab51907c073d83831b2810d06305e037bdc1 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Thu, 14 Sep 2023 20:43:19 +0206
Subject: [PATCH 028/196] serial: core: Use lock wrappers
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
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>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Link: https://lore.kernel.org/r/20230914183831.587273-3-john.ogness@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
include/linux/serial_core.h | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index 27a26092493a..f43aca7f3b01 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -1057,14 +1057,14 @@ static inline void uart_unlock_and_check_sysrq(struct uart_port *port)
u8 sysrq_ch;
if (!port->has_sysrq) {
- spin_unlock(&port->lock);
+ uart_port_unlock(port);
return;
}
sysrq_ch = port->sysrq_ch;
port->sysrq_ch = 0;
- spin_unlock(&port->lock);
+ uart_port_unlock(port);
if (sysrq_ch)
handle_sysrq(sysrq_ch);
@@ -1076,14 +1076,14 @@ static inline void uart_unlock_and_check_sysrq_irqrestore(struct uart_port *port
u8 sysrq_ch;
if (!port->has_sysrq) {
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
return;
}
sysrq_ch = port->sysrq_ch;
port->sysrq_ch = 0;
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
if (sysrq_ch)
handle_sysrq(sysrq_ch);
@@ -1099,12 +1099,12 @@ static inline int uart_prepare_sysrq_char(struct uart_port *port, u8 ch)
}
static inline void uart_unlock_and_check_sysrq(struct uart_port *port)
{
- spin_unlock(&port->lock);
+ uart_port_unlock(port);
}
static inline void uart_unlock_and_check_sysrq_irqrestore(struct uart_port *port,
unsigned long flags)
{
- spin_unlock_irqrestore(&port->lock, flags);
+ uart_port_unlock_irqrestore(port, flags);
}
#endif /* CONFIG_MAGIC_SYSRQ_SERIAL */
--
2.43.2