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/soc/fsl/Kconfig | 55 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 55 insertions(+) create mode 100644 drivers/soc/fsl/Kconfig (limited to 'drivers/soc/fsl/Kconfig') diff --git a/drivers/soc/fsl/Kconfig b/drivers/soc/fsl/Kconfig new file mode 100644 index 000000000..47870e29c --- /dev/null +++ b/drivers/soc/fsl/Kconfig @@ -0,0 +1,55 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# NXP/Freescale QorIQ series SOC drivers +# + +menu "NXP/Freescale QorIQ SoC drivers" + +source "drivers/soc/fsl/qbman/Kconfig" +source "drivers/soc/fsl/qe/Kconfig" + +config FSL_GUTS + bool + select SOC_BUS + help + The global utilities block controls power management, I/O device + enabling, power-onreset(POR) configuration monitoring, alternate + function selection for multiplexed signals,and clock control. + This driver is to manage and access global utilities block. + Initially only reading SVR and registering soc device are supported. + Other guts accesses, such as reading RCW, should eventually be moved + into this driver as well. + +config FSL_MC_DPIO + tristate "QorIQ DPAA2 DPIO driver" + depends on FSL_MC_BUS && NET + select SOC_BUS + select FSL_GUTS + select DIMLIB + help + Driver for the DPAA2 DPIO object. A DPIO provides queue and + buffer management facilities for software to interact with + other DPAA2 objects. This driver does not expose the DPIO + objects individually, but groups them under a service layer + API. + +config DPAA2_CONSOLE + tristate "QorIQ DPAA2 console driver" + depends on OF && (ARCH_LAYERSCAPE || COMPILE_TEST) + default ARCH_LAYERSCAPE + help + Console driver for DPAA2 platforms. Exports 2 char devices, + /dev/dpaa2_mc_console and /dev/dpaa2_aiop_console, + which can be used to dump the Management Complex and AIOP + firmware logs. + +config FSL_RCPM + bool "Freescale RCPM support" + depends on PM_SLEEP && (ARM || ARM64) + help + The NXP QorIQ Processors based on ARM Core have RCPM module + (Run Control and Power Management), which performs all device-level + tasks associated with power management, such as wakeup source control. + Note that currently this driver will not support PowerPC based + QorIQ processor. +endmenu -- cgit v1.3.1