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>

1 files changed, 58 insertions, 0 deletions

diff --git a/sound/soc/codecs/rt5575.h b/sound/soc/codecs/rt5575.h
new file mode 100644
index 000000000..752a3c8f5
--- /dev/null
+++ b/sound/soc/codecs/rt5575.h
@@ -0,0 +1,58 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * rt5575.h  --  ALC5575 ALSA SoC audio driver
+ *
+ * Copyright(c) 2025 Realtek Semiconductor Corp.
+ *
+ */
+
+#ifndef __RT5575_H__
+#define __RT5575_H__
+
+#define RT5575_DEVICE_ID	0x10ec5575
+#define RT5575_DSP_MAPPING	0x18000000
+
+#define RT5575_BOOT		0x8004
+#define RT5575_ID		0x8008
+#define RT5575_ID_1		0x800c
+#define RT5575_MIXL_VOL		0x8a14
+#define RT5575_MIXR_VOL		0x8a18
+#define RT5575_PROMPT_VOL	0x8a84
+#define RT5575_SPK01_VOL	0x8a88
+#define RT5575_SPK23_VOL	0x8a8c
+#define RT5575_MIC1_VOL		0x8a98
+#define RT5575_MIC2_VOL		0x8a9c
+#define RT5575_WNC_CTRL		0x80ec
+#define RT5575_MODE_CTRL	0x80f0
+#define RT5575_I2S_RATE_CTRL	0x80f4
+#define RT5575_SLEEP_CTRL	0x80f8
+#define RT5575_ALG_BYPASS_CTRL	0x80fc
+#define RT5575_PINMUX_CTRL_2	0x81a4
+#define RT5575_GPIO_CTRL_1	0x8208
+#define RT5575_DSP_BUS_CTRL	0x880c
+#define RT5575_SW_INT		0x0018
+#define RT5575_DSP_BOOT_ERR	0x8e14
+#define RT5575_DSP_READY	0x8e24
+#define RT5575_DSP_CMD_ADDR	0x8e28
+#define RT5575_EFUSE_DATA_2	0xc638
+#define RT5575_EFUSE_DATA_3	0xc63c
+#define RT5575_EFUSE_PID	0xc660
+
+#define RT5575_BOOT_MASK	0x3
+#define RT5575_BOOT_SPI		0x0
+
+enum {
+	RT5575_AIF1,
+	RT5575_AIF2,
+	RT5575_AIF3,
+	RT5575_AIF4,
+	RT5575_AIFS,
+};
+
+struct rt5575_priv {
+	struct i2c_client *i2c;
+	struct snd_soc_component *component;
+	struct regmap *dsp_regmap, *regmap;
+};
+
+#endif /* __RT5575_H__ */