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| author | Steven Rostedt <rostedt@goodmis.org> | 2026-09-02 09:55:01 -0400 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2026-09-02 11:08:21 -0400 |
| commit | 4617721c502b2ddaa4e324e86da4997edf738fa5 (patch) | |
| tree | 350aa83b47da0b574a814795392b20b0bed83cbc /drivers/clk/actions/Kconfig | |
| download | linux-stable-4617721c502b2ddaa4e324e86da4997edf738fa5.tar.gz linux-stable-4617721c502b2ddaa4e324e86da4997edf738fa5.zip | |
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>
Diffstat (limited to 'drivers/clk/actions/Kconfig')
| -rw-r--r-- | drivers/clk/actions/Kconfig | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/clk/actions/Kconfig b/drivers/clk/actions/Kconfig new file mode 100644 index 000000000..068639199 --- /dev/null +++ b/drivers/clk/actions/Kconfig @@ -0,0 +1,28 @@ +# SPDX-License-Identifier: GPL-2.0-only +config CLK_ACTIONS + bool "Clock driver for Actions Semi SoCs" + depends on ARCH_ACTIONS || COMPILE_TEST + select REGMAP_MMIO + select RESET_CONTROLLER + default ARCH_ACTIONS + +if CLK_ACTIONS + +# SoC Drivers + +config CLK_OWL_S500 + bool "Support for the Actions Semi OWL S500 clocks" + depends on ARCH_ACTIONS || COMPILE_TEST + default ARCH_ACTIONS + +config CLK_OWL_S700 + bool "Support for the Actions Semi OWL S700 clocks" + depends on (ARM64 && ARCH_ACTIONS) || COMPILE_TEST + default ARM64 && ARCH_ACTIONS + +config CLK_OWL_S900 + bool "Support for the Actions Semi OWL S900 clocks" + depends on (ARM64 && ARCH_ACTIONS) || COMPILE_TEST + default ARM64 && ARCH_ACTIONS + +endif |