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/xilinx/Kconfig | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 drivers/soc/xilinx/Kconfig (limited to 'drivers/soc/xilinx/Kconfig') diff --git a/drivers/soc/xilinx/Kconfig b/drivers/soc/xilinx/Kconfig new file mode 100644 index 000000000..49d69d6e1 --- /dev/null +++ b/drivers/soc/xilinx/Kconfig @@ -0,0 +1,29 @@ +# SPDX-License-Identifier: GPL-2.0 +menu "Xilinx SoC drivers" + +config ZYNQMP_POWER + bool "Enable Xilinx Zynq MPSoC Power Management driver" + depends on PM && ZYNQMP_FIRMWARE + default y + select MAILBOX + select ZYNQMP_IPI_MBOX + help + Say yes to enable power management support for ZyqnMP SoC. + This driver uses firmware driver as an interface for power + management request to firmware. It registers isr to handle + power management callbacks from firmware. It registers mailbox client + to handle power management callbacks from firmware. + + If in doubt, say N. + +config XLNX_EVENT_MANAGER + bool "Enable Xilinx Event Management Driver" + depends on ZYNQMP_FIRMWARE + default ZYNQMP_FIRMWARE + help + Say yes to enable event management support for Xilinx. + This driver uses firmware driver as an interface for event/power + management request to firmware. + + If in doubt, say N. +endmenu -- cgit v1.3.1