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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 /arch/mips/bcm63xx/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 'arch/mips/bcm63xx/Kconfig')
| -rw-r--r-- | arch/mips/bcm63xx/Kconfig | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/arch/mips/bcm63xx/Kconfig b/arch/mips/bcm63xx/Kconfig new file mode 100644 index 000000000..837f6e5a2 --- /dev/null +++ b/arch/mips/bcm63xx/Kconfig @@ -0,0 +1,45 @@ +# SPDX-License-Identifier: GPL-2.0 +menu "CPU support" + depends on BCM63XX + +config BCM63XX_CPU_3368 + bool "support 3368 CPU" + select SYS_HAS_CPU_BMIPS4350 + select HAVE_PCI + +config BCM63XX_CPU_6328 + bool "support 6328 CPU" + select SYS_HAS_CPU_BMIPS4350 + select HAVE_PCI + +config BCM63XX_CPU_6338 + bool "support 6338 CPU" + select SYS_HAS_CPU_BMIPS32_3300 + select HAVE_PCI + +config BCM63XX_CPU_6345 + bool "support 6345 CPU" + select SYS_HAS_CPU_BMIPS32_3300 + +config BCM63XX_CPU_6348 + bool "support 6348 CPU" + select SYS_HAS_CPU_BMIPS32_3300 + select HAVE_PCI + +config BCM63XX_CPU_6358 + bool "support 6358 CPU" + select SYS_HAS_CPU_BMIPS4350 + select HAVE_PCI + +config BCM63XX_CPU_6362 + bool "support 6362 CPU" + select SYS_HAS_CPU_BMIPS4350 + select HAVE_PCI + +config BCM63XX_CPU_6368 + bool "support 6368 CPU" + select SYS_HAS_CPU_BMIPS4350 + select HAVE_PCI +endmenu + +source "arch/mips/bcm63xx/boards/Kconfig" |