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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 /net/ncsi/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 'net/ncsi/Kconfig')
| -rw-r--r-- | net/ncsi/Kconfig | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/net/ncsi/Kconfig b/net/ncsi/Kconfig new file mode 100644 index 000000000..ea1dd32b6 --- /dev/null +++ b/net/ncsi/Kconfig @@ -0,0 +1,25 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# Configuration for NCSI support +# + +config NET_NCSI + bool "NCSI interface support" + depends on INET + help + This module provides NCSI (Network Controller Sideband Interface) + support. Enable this only if your system connects to a network + device via NCSI and the ethernet driver you're using supports + the protocol explicitly. +config NCSI_OEM_CMD_GET_MAC + bool "Get NCSI OEM MAC Address" + depends on NET_NCSI + help + This allows to get MAC address from NCSI firmware and set them back to + controller. +config NCSI_OEM_CMD_KEEP_PHY + bool "Keep PHY Link up" + depends on NET_NCSI + help + This allows to keep PHY link up and prevents any channel resets during + the host load. |