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/reset/spacemit/Kconfig | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100644 drivers/reset/spacemit/Kconfig (limited to 'drivers/reset/spacemit/Kconfig') diff --git a/drivers/reset/spacemit/Kconfig b/drivers/reset/spacemit/Kconfig new file mode 100644 index 000000000..545d6b41c --- /dev/null +++ b/drivers/reset/spacemit/Kconfig @@ -0,0 +1,36 @@ +# SPDX-License-Identifier: GPL-2.0-only + +menu "Reset support for SpacemiT platforms" + depends on ARCH_SPACEMIT || COMPILE_TEST + +config RESET_SPACEMIT_COMMON + tristate + select AUXILIARY_BUS + help + Common reset controller infrastructure for SpacemiT SoCs. + This provides shared code and helper functions used by + reset drivers for various SpacemiT SoC families. + +config RESET_SPACEMIT_K1 + tristate "Support for SpacemiT K1 SoC" + depends on SPACEMIT_K1_CCU + select RESET_SPACEMIT_COMMON + default SPACEMIT_K1_CCU + help + Support for reset controller in SpacemiT K1 SoC. + This driver works with the SpacemiT K1 clock controller + unit (CCU) driver to provide reset control functionality + for various peripherals and subsystems in the SoC. + +config RESET_SPACEMIT_K3 + tristate "Support for SpacemiT K3 SoC" + depends on SPACEMIT_K3_CCU + select RESET_SPACEMIT_COMMON + default SPACEMIT_K3_CCU + help + Support for reset controller in SpacemiT K3 SoC. + This driver works with the SpacemiT K3 clock controller + unit (CCU) driver to provide reset control functionality + for various peripherals and subsystems in the SoC. + +endmenu -- cgit v1.3.1