From 4617721c502b2ddaa4e324e86da4997edf738fa5 Mon Sep 17 00:00:00 2001 From: Steven Rostedt Date: Wed, 2 Sep 2026 09:55:01 -0400 Subject: ftrace: Synchronize the initialization of ftrace_ops There's some internal state that ftrace_ops needs to have set, but since it can be declared outside of the ftrace.c code, it calls ftrace_ops_init() on the ops in every global function. The issue is that if two tasks call it on the same ops at the same time it is possible to have the initialization of one corrupt the initialization of the other call. Create a ops_mutex to use to synchronize every initialization of the ftrace_ops. The mutex is taken within checking the ftrace_ops flag that states it was initializied but the flag is checked again after the mutex has been taken. Checking first outside the mutex allows it to shortcut having to take the mutex. But then the check needs to be done again after the mute is taken in case of races. Cc: stable@vger.kernel.org Link: https://patch.msgid.link/20260902095501.6b59af20@gandalf.local.home Fixes: f04f24fb7e48d ("ftrace, kprobes: Fix a deadlock on ftrace_regex_lock") Reported-by: sashiko-bot@kernel.org Close: https://lore.kernel.org/all/20260829025528.49A831F000E9@smtp.kernel.org/ Signed-off-by: Steven Rostedt --- drivers/pinctrl/spear/Kconfig | 57 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 drivers/pinctrl/spear/Kconfig (limited to 'drivers/pinctrl/spear/Kconfig') diff --git a/drivers/pinctrl/spear/Kconfig b/drivers/pinctrl/spear/Kconfig new file mode 100644 index 000000000..98f5a84cc --- /dev/null +++ b/drivers/pinctrl/spear/Kconfig @@ -0,0 +1,57 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# ST Microelectronics SPEAr PINCTRL drivers +# + +if PLAT_SPEAR + +config PINCTRL_SPEAR + bool + depends on OF + select PINMUX + help + This enables pin control drivers for SPEAr Platform + +config PINCTRL_SPEAR3XX + bool + depends on ARCH_SPEAR3XX + select PINCTRL_SPEAR + +config PINCTRL_SPEAR300 + bool "ST Microelectronics SPEAr300 SoC pin controller driver" + depends on MACH_SPEAR300 + select PINCTRL_SPEAR3XX + +config PINCTRL_SPEAR310 + bool "ST Microelectronics SPEAr310 SoC pin controller driver" + depends on MACH_SPEAR310 + select PINCTRL_SPEAR3XX + select PINCTRL_SPEAR_PLGPIO + +config PINCTRL_SPEAR320 + bool "ST Microelectronics SPEAr320 SoC pin controller driver" + depends on MACH_SPEAR320 + select PINCTRL_SPEAR3XX + select PINCTRL_SPEAR_PLGPIO + +config PINCTRL_SPEAR1310 + bool "ST Microelectronics SPEAr1310 SoC pin controller driver" + depends on MACH_SPEAR1310 + select PINCTRL_SPEAR + select PINCTRL_SPEAR_PLGPIO + +config PINCTRL_SPEAR1340 + bool "ST Microelectronics SPEAr1340 SoC pin controller driver" + depends on MACH_SPEAR1340 + select PINCTRL_SPEAR + select PINCTRL_SPEAR_PLGPIO + +config PINCTRL_SPEAR_PLGPIO + bool "SPEAr SoC PLGPIO Controller" + depends on GPIOLIB && PINCTRL_SPEAR + select GPIOLIB_IRQCHIP + help + Say yes here to support PLGPIO controller on ST Microelectronics SPEAr + SoCs. + +endif -- cgit v1.3.1