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, 259 insertions, 0 deletions

diff --git a/drivers/clk/meson/Kconfig b/drivers/clk/meson/Kconfig
new file mode 100644
index 000000000..d460514bb
--- /dev/null
+++ b/drivers/clk/meson/Kconfig
@@ -0,0 +1,259 @@
+# SPDX-License-Identifier: GPL-2.0-only
+menu "Clock support for Amlogic platforms"
+	depends on ARCH_MESON || COMPILE_TEST
+
+config COMMON_CLK_MESON_REGMAP
+	tristate
+	select REGMAP
+	select MFD_SYSCON
+
+config COMMON_CLK_MESON_DUALDIV
+	tristate
+	select COMMON_CLK_MESON_REGMAP
+
+config COMMON_CLK_MESON_MPLL
+	tristate
+	select COMMON_CLK_MESON_REGMAP
+
+config COMMON_CLK_MESON_PHASE
+	tristate
+	select COMMON_CLK_MESON_REGMAP
+
+config COMMON_CLK_MESON_PLL
+	tristate
+	select COMMON_CLK_MESON_REGMAP
+
+config COMMON_CLK_MESON_SCLK_DIV
+	tristate
+	select COMMON_CLK_MESON_REGMAP
+
+config COMMON_CLK_MESON_VID_PLL_DIV
+	tristate
+	select COMMON_CLK_MESON_REGMAP
+
+config COMMON_CLK_MESON_VCLK
+	tristate
+	select COMMON_CLK_MESON_REGMAP
+
+config COMMON_CLK_MESON_CLKC_UTILS
+	select REGMAP
+	select MFD_SYSCON
+	tristate
+
+config COMMON_CLK_MESON_AO_CLKC
+	tristate
+	select COMMON_CLK_MESON_REGMAP
+	select COMMON_CLK_MESON_CLKC_UTILS
+	select RESET_CONTROLLER
+
+config COMMON_CLK_MESON_CPU_DYNDIV
+	tristate
+	select COMMON_CLK_MESON_REGMAP
+
+config COMMON_CLK_MESON8B
+	bool "Meson8 SoC Clock controller support"
+	depends on ARM
+	default ARCH_MESON
+	select COMMON_CLK_MESON_REGMAP
+	select COMMON_CLK_MESON_CLKC_UTILS
+	select COMMON_CLK_MESON_MPLL
+	select COMMON_CLK_MESON_PLL
+	select MFD_SYSCON
+	select RESET_CONTROLLER
+	help
+	  Support for the clock controller on AmLogic S802 (Meson8),
+	  S805 (Meson8b) and S812 (Meson8m2) devices. Say Y if you
+	  want peripherals and CPU frequency scaling to work.
+
+config COMMON_CLK_GXBB
+	tristate "GXBB and GXL SoC clock controllers support"
+	depends on ARM64
+	default ARCH_MESON
+	select COMMON_CLK_MESON_REGMAP
+	select COMMON_CLK_MESON_CLKC_UTILS
+	select COMMON_CLK_MESON_DUALDIV
+	select COMMON_CLK_MESON_VID_PLL_DIV
+	select COMMON_CLK_MESON_MPLL
+	select COMMON_CLK_MESON_PLL
+	select COMMON_CLK_MESON_AO_CLKC
+	select MFD_SYSCON
+	help
+	  Support for the clock controller on AmLogic S905 devices, aka gxbb.
+	  Say Y if you want peripherals and CPU frequency scaling to work.
+
+config COMMON_CLK_AXG
+	tristate "AXG SoC clock controllers support"
+	depends on ARM64
+	default ARCH_MESON
+	select COMMON_CLK_MESON_REGMAP
+	select COMMON_CLK_MESON_CLKC_UTILS
+	select COMMON_CLK_MESON_DUALDIV
+	select COMMON_CLK_MESON_MPLL
+	select COMMON_CLK_MESON_PLL
+	select COMMON_CLK_MESON_AO_CLKC
+	select MFD_SYSCON
+	help
+	  Support for the clock controller on AmLogic A113D devices, aka axg.
+	  Say Y if you want peripherals and CPU frequency scaling to work.
+
+config COMMON_CLK_AXG_AUDIO
+	tristate "Meson AXG Audio Clock Controller Driver"
+	depends on ARM64
+	select COMMON_CLK_MESON_REGMAP
+	select COMMON_CLK_MESON_PHASE
+	select COMMON_CLK_MESON_SCLK_DIV
+	select COMMON_CLK_MESON_CLKC_UTILS
+	select REGMAP_MMIO
+	select AUXILIARY_BUS
+	imply RESET_MESON_AUX
+	help
+	  Support for the audio clock controller on AmLogic A113D devices,
+	  aka axg, Say Y if you want audio subsystem to work.
+
+config COMMON_CLK_A1_PLL
+	tristate "Amlogic A1 SoC PLL controller support"
+	depends on ARM64
+	select COMMON_CLK_MESON_REGMAP
+	select COMMON_CLK_MESON_CLKC_UTILS
+	select COMMON_CLK_MESON_PLL
+	help
+	  Support for the PLL clock controller on Amlogic A113L based
+	  device, A1 SoC Family. Say Y if you want A1 PLL clock controller
+	  to work.
+
+config COMMON_CLK_A1_PERIPHERALS
+	tristate "Amlogic A1 SoC Peripherals clock controller support"
+	depends on ARM64
+	select COMMON_CLK_MESON_DUALDIV
+	select COMMON_CLK_MESON_REGMAP
+	select COMMON_CLK_MESON_CLKC_UTILS
+	help
+	  Support for the Peripherals clock controller on Amlogic A113L based
+	  device, A1 SoC Family. Say Y if you want A1 Peripherals clock
+	  controller to work.
+
+config COMMON_CLK_A9_PERIPHERALS
+	tristate "Amlogic A9 SoC peripherals clock controller support"
+	depends on ARM64 || COMPILE_TEST
+	default ARCH_MESON
+	select COMMON_CLK_MESON_REGMAP
+	select COMMON_CLK_MESON_CLKC_UTILS
+	select COMMON_CLK_MESON_DUALDIV
+	select COMMON_CLK_MESON_VID_PLL_DIV
+	imply COMMON_CLK_SCMI
+	help
+	  Support for the peripherals clock controller on Amlogic A311Y3 based
+	  device, AKA A9. Peripherals are required by most peripheral to operate.
+	  Say Y if you want A9 peripherals clock controller to work.
+
+config COMMON_CLK_A9_AO
+	tristate "Amlogic A9 SoC AO clock controller support"
+	depends on ARM64 || COMPILE_TEST
+	default ARCH_MESON
+	select COMMON_CLK_MESON_REGMAP
+	select COMMON_CLK_MESON_CLKC_UTILS
+	select COMMON_CLK_MESON_DUALDIV
+	imply COMMON_CLK_SCMI
+	help
+	  Support for the AO clock controller on Amlogic A311Y3 based
+	  device, AKA A9.
+	  Say Y if you want A9 AO clock controller to work.
+
+config COMMON_CLK_C3_PLL
+	tristate "Amlogic C3 PLL clock controller"
+	depends on ARM64
+	default ARCH_MESON
+	select COMMON_CLK_MESON_REGMAP
+	select COMMON_CLK_MESON_PLL
+	select COMMON_CLK_MESON_CLKC_UTILS
+	imply COMMON_CLK_SCMI
+	help
+	  Support for the PLL clock controller on Amlogic C302X and C308L devices,
+	  AKA C3. Say Y if you want the board to work, because PLLs are the parent
+	  of most peripherals.
+
+config COMMON_CLK_C3_PERIPHERALS
+	tristate "Amlogic C3 peripherals clock controller"
+	depends on ARM64
+	default ARCH_MESON
+	select COMMON_CLK_MESON_REGMAP
+	select COMMON_CLK_MESON_DUALDIV
+	select COMMON_CLK_MESON_CLKC_UTILS
+	imply COMMON_CLK_SCMI
+	imply COMMON_CLK_C3_PLL
+	help
+	  Support for the Peripherals clock controller on Amlogic C302X and
+	  C308L devices, AKA C3. Say Y if you want the peripherals clock to
+	  work.
+
+config COMMON_CLK_G12A
+	tristate "G12 and SM1 SoC clock controllers support"
+	depends on ARM64
+	default ARCH_MESON
+	select COMMON_CLK_MESON_REGMAP
+	select COMMON_CLK_MESON_CLKC_UTILS
+	select COMMON_CLK_MESON_DUALDIV
+	select COMMON_CLK_MESON_MPLL
+	select COMMON_CLK_MESON_PLL
+	select COMMON_CLK_MESON_AO_CLKC
+	select COMMON_CLK_MESON_CPU_DYNDIV
+	select COMMON_CLK_MESON_VID_PLL_DIV
+	select COMMON_CLK_MESON_VCLK
+	select MFD_SYSCON
+	help
+	  Support for the clock controller on Amlogic S905D2, S905X2 and S905Y2
+	  devices, aka g12a. Say Y if you want peripherals to work.
+
+config COMMON_CLK_S4_PLL
+	tristate "S4 SoC PLL clock controllers support"
+	depends on ARM64
+	default ARCH_MESON
+	select COMMON_CLK_MESON_CLKC_UTILS
+	select COMMON_CLK_MESON_MPLL
+	select COMMON_CLK_MESON_PLL
+	select COMMON_CLK_MESON_REGMAP
+	help
+	  Support for the PLL clock controller on Amlogic S805X2 and S905Y4 devices,
+	  AKA S4. Say Y if you want the board to work, because PLLs are the parent of
+	  most peripherals.
+
+config COMMON_CLK_S4_PERIPHERALS
+	tristate "S4 SoC peripherals clock controllers support"
+	depends on ARM64
+	default ARCH_MESON
+	select COMMON_CLK_MESON_CLKC_UTILS
+	select COMMON_CLK_MESON_REGMAP
+	select COMMON_CLK_MESON_DUALDIV
+	select COMMON_CLK_MESON_VID_PLL_DIV
+	help
+	  Support for the peripherals clock controller on Amlogic S805X2 and S905Y4
+	  devices, AKA S4. Say Y if you want S4 peripherals clock controller to work.
+
+config COMMON_CLK_T7_PLL
+	tristate "Amlogic T7 SoC PLL controller support"
+	depends on ARM64
+	default ARCH_MESON
+	select COMMON_CLK_MESON_REGMAP
+	select COMMON_CLK_MESON_CLKC_UTILS
+	select COMMON_CLK_MESON_MPLL
+	select COMMON_CLK_MESON_PLL
+	imply COMMON_CLK_SCMI
+	help
+	  Support for the PLL clock controller on Amlogic A311D2 based
+	  device, AKA T7. PLLs are required by most peripheral to operate.
+	  Say Y if you want T7 PLL clock controller to work.
+
+config COMMON_CLK_T7_PERIPHERALS
+	tristate "Amlogic T7 SoC peripherals clock controller support"
+	depends on ARM64
+	default ARCH_MESON
+	select COMMON_CLK_MESON_REGMAP
+	select COMMON_CLK_MESON_CLKC_UTILS
+	select COMMON_CLK_MESON_DUALDIV
+	imply COMMON_CLK_SCMI
+	imply COMMON_CLK_T7_PLL
+	help
+	  Support for the peripherals clock controller on Amlogic A311D2 based
+	  device, AKA T7. Peripherals are required by most peripheral to operate.
+	  Say Y if you want T7 peripherals clock controller to work.
+endmenu