ftrace: Synchronize the initialization of ftrace_opsgrafted

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 <rostedt@goodmis.org>

1 files changed, 285 insertions, 0 deletions

diff --git a/drivers/pinctrl/freescale/Kconfig b/drivers/pinctrl/freescale/Kconfig
new file mode 100644
index 000000000..fd53cf5bb
--- /dev/null
+++ b/drivers/pinctrl/freescale/Kconfig
@@ -0,0 +1,285 @@
+# SPDX-License-Identifier: GPL-2.0-only
+config PINCTRL_IMX
+	tristate
+	depends on OF
+	select GENERIC_PINCTRL_GROUPS
+	select GENERIC_PINMUX_FUNCTIONS
+	select PINCONF
+	select REGMAP
+
+config PINCTRL_IMX_SCMI
+	tristate "i.MX95 pinctrl driver using SCMI protocol interface"
+	depends on (ARM_SCMI_PROTOCOL && OF && ARCH_MXC) || COMPILE_TEST
+	select PINMUX
+	select GENERIC_PINCONF
+	select GENERIC_PINCTRL_GROUPS
+	select GENERIC_PINMUX_FUNCTIONS
+	help
+	  i.MX95 SCMI firmware provides pinctrl protocol. This driver
+	  utilizes the SCMI interface to do pinctrl configuration.
+
+config PINCTRL_IMX_SCU
+	tristate
+	depends on OF
+	depends on IMX_SCU || COMPILE_TEST
+	default IMX_SCU
+	select PINCTRL_IMX
+
+config PINCTRL_IMX1_CORE
+	bool
+	select PINMUX
+	select PINCONF
+
+config PINCTRL_IMX1
+	bool "IMX1 pinctrl driver"
+	depends on OF
+	depends on SOC_IMX1 || COMPILE_TEST
+	default SOC_IMX1
+	select PINCTRL_IMX1_CORE
+	help
+	  Say Y here to enable the imx1 pinctrl driver
+
+config PINCTRL_IMX27
+	bool "IMX27 pinctrl driver"
+	depends on OF
+	depends on SOC_IMX27 || COMPILE_TEST
+	default SOC_IMX27
+	select PINCTRL_IMX1_CORE
+	help
+	  Say Y here to enable the imx27 pinctrl driver
+
+
+config PINCTRL_IMX25
+	bool "IMX25 pinctrl driver"
+	depends on OF
+	depends on SOC_IMX25 || COMPILE_TEST
+	default SOC_IMX25
+	select PINCTRL_IMX
+	help
+	  Say Y here to enable the imx25 pinctrl driver
+
+config PINCTRL_IMX35
+	bool "IMX35 pinctrl driver"
+	depends on OF
+	depends on SOC_IMX35 || COMPILE_TEST
+	default SOC_IMX35
+	select PINCTRL_IMX
+	help
+	  Say Y here to enable the imx35 pinctrl driver
+
+config PINCTRL_IMX50
+	bool "IMX50 pinctrl driver"
+	depends on OF
+	depends on SOC_IMX50 || COMPILE_TEST
+	default SOC_IMX50
+	select PINCTRL_IMX
+	help
+	  Say Y here to enable the imx50 pinctrl driver
+
+config PINCTRL_IMX51
+	bool "IMX51 pinctrl driver"
+	depends on OF
+	depends on SOC_IMX51 || COMPILE_TEST
+	default SOC_IMX51
+	select PINCTRL_IMX
+	help
+	  Say Y here to enable the imx51 pinctrl driver
+
+config PINCTRL_IMX53
+	bool "IMX53 pinctrl driver"
+	depends on OF
+	depends on SOC_IMX53 || COMPILE_TEST
+	default SOC_IMX53
+	select PINCTRL_IMX
+	help
+	  Say Y here to enable the imx53 pinctrl driver
+
+config PINCTRL_IMX6Q
+	bool "IMX6Q/DL pinctrl driver"
+	depends on OF
+	depends on SOC_IMX6Q || COMPILE_TEST
+	default SOC_IMX6Q
+	select PINCTRL_IMX
+	help
+	  Say Y here to enable the imx6q/dl pinctrl driver
+
+config PINCTRL_IMX6SL
+	bool "IMX6SL pinctrl driver"
+	depends on OF
+	depends on SOC_IMX6SL || COMPILE_TEST
+	default SOC_IMX6SL
+	select PINCTRL_IMX
+	help
+	  Say Y here to enable the imx6sl pinctrl driver
+
+config PINCTRL_IMX6SLL
+	bool "IMX6SLL pinctrl driver"
+	depends on OF
+	depends on SOC_IMX6SLL || COMPILE_TEST
+	default SOC_IMX6SLL
+	select PINCTRL_IMX
+	help
+	  Say Y here to enable the imx6sll pinctrl driver
+
+config PINCTRL_IMX6SX
+	bool "IMX6SX pinctrl driver"
+	depends on OF
+	depends on SOC_IMX6SX || COMPILE_TEST
+	default SOC_IMX6SX
+	select PINCTRL_IMX
+	help
+	  Say Y here to enable the imx6sx pinctrl driver
+
+config PINCTRL_IMX6UL
+	bool "IMX6UL pinctrl driver"
+	depends on OF
+	depends on SOC_IMX6UL || COMPILE_TEST
+	default SOC_IMX6UL
+	select PINCTRL_IMX
+	help
+	  Say Y here to enable the imx6ul pinctrl driver
+
+config PINCTRL_IMX7D
+	bool "IMX7D pinctrl driver"
+	depends on OF
+	depends on SOC_IMX7D || COMPILE_TEST
+	default SOC_IMX7D
+	select PINCTRL_IMX
+	help
+	  Say Y here to enable the imx7d pinctrl driver
+
+config PINCTRL_IMX7ULP
+	bool "IMX7ULP pinctrl driver"
+	depends on OF
+	depends on SOC_IMX7ULP || COMPILE_TEST
+	default SOC_IMX7ULP
+	select PINCTRL_IMX
+	help
+	  Say Y here to enable the imx7ulp pinctrl driver
+
+config PINCTRL_IMX8MM
+	tristate "IMX8MM pinctrl driver"
+	depends on OF
+	depends on SOC_IMX8M || COMPILE_TEST
+	default SOC_IMX8M
+	select PINCTRL_IMX
+	help
+	  Say Y here to enable the imx8mm pinctrl driver
+
+config PINCTRL_IMX8MN
+	tristate "IMX8MN pinctrl driver"
+	depends on OF
+	depends on SOC_IMX8M || COMPILE_TEST
+	default SOC_IMX8M
+	select PINCTRL_IMX
+	help
+	  Say Y here to enable the imx8mn pinctrl driver
+
+config PINCTRL_IMX8MP
+	tristate "IMX8MP pinctrl driver"
+	depends on OF
+	depends on SOC_IMX8M || COMPILE_TEST
+	default SOC_IMX8M
+	select PINCTRL_IMX
+	help
+	  Say Y here to enable the imx8mp pinctrl driver
+
+config PINCTRL_IMX8MQ
+	tristate "IMX8MQ pinctrl driver"
+	depends on OF
+	depends on SOC_IMX8M || COMPILE_TEST
+	default SOC_IMX8M
+	select PINCTRL_IMX
+	help
+	  Say Y here to enable the imx8mq pinctrl driver
+
+config PINCTRL_IMX8QM
+	tristate "IMX8QM pinctrl driver"
+	depends on OF
+	depends on (IMX_SCU && ARCH_MXC && ARM64) || COMPILE_TEST
+	default ARCH_MXC
+	select PINCTRL_IMX_SCU
+	help
+	  Say Y here to enable the imx8qm pinctrl driver
+
+config PINCTRL_IMX8QXP
+	tristate "IMX8QXP pinctrl driver"
+	depends on OF
+	depends on (IMX_SCU && ARCH_MXC && ARM64) || COMPILE_TEST
+	default ARCH_MXC
+	select PINCTRL_IMX_SCU
+	help
+	  Say Y here to enable the imx8qxp pinctrl driver
+
+config PINCTRL_IMX8DXL
+	tristate "IMX8DXL pinctrl driver"
+	depends on OF
+	depends on (IMX_SCU && ARCH_MXC && ARM64) || COMPILE_TEST
+	default ARCH_MXC
+	select PINCTRL_IMX_SCU
+	help
+	  Say Y here to enable the imx8dxl pinctrl driver
+
+config PINCTRL_IMX8ULP
+	tristate "IMX8ULP pinctrl driver"
+	depends on OF
+	depends on ARCH_MXC || COMPILE_TEST
+	default ARCH_MXC
+	select PINCTRL_IMX
+	help
+	  Say Y here to enable the imx8ulp pinctrl driver
+
+config PINCTRL_IMXRT1050
+	bool "IMXRT1050 pinctrl driver"
+	depends on OF
+	depends on SOC_IMXRT || COMPILE_TEST
+	default SOC_IMXRT
+	select PINCTRL_IMX
+	help
+	  Say Y here to enable the imxrt1050 pinctrl driver
+
+config PINCTRL_IMX91
+	tristate "IMX91 pinctrl driver"
+	depends on ARCH_MXC
+	select PINCTRL_IMX
+	help
+	  Say Y here to enable the imx91 pinctrl driver
+
+config PINCTRL_IMX93
+	tristate "IMX93 pinctrl driver"
+	depends on OF
+	depends on ARCH_MXC || COMPILE_TEST
+	default SOC_IMX9
+	select PINCTRL_IMX
+	help
+	  Say Y here to enable the imx93 pinctrl driver
+
+config PINCTRL_VF610
+	bool "Freescale Vybrid VF610 pinctrl driver"
+	depends on OF
+	depends on SOC_VF610 || COMPILE_TEST
+	default SOC_VF610
+	select PINCTRL_IMX
+	help
+	  Say Y here to enable the Freescale Vybrid VF610 pinctrl driver
+
+config PINCTRL_MXS
+	bool
+	select PINMUX
+	select PINCONF
+
+config PINCTRL_IMX23
+	bool
+	select PINCTRL_MXS
+
+config PINCTRL_IMX28
+	bool
+	select PINCTRL_MXS
+
+config PINCTRL_IMXRT1170
+	bool "IMXRT1170 pinctrl driver"
+	depends on OF
+	depends on SOC_IMXRT || COMPILE_TEST
+	select PINCTRL_IMX
+	help
+	  Say Y here to enable the imxrt1170 pinctrl driver