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, 274 insertions, 0 deletions

diff --git a/sound/soc/codecs/rt721-sdca.h b/sound/soc/codecs/rt721-sdca.h
new file mode 100644
index 000000000..24ce18856
--- /dev/null
+++ b/sound/soc/codecs/rt721-sdca.h
@@ -0,0 +1,274 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * rt721-sdca.h -- RT721 SDCA ALSA SoC audio driver header
+ *
+ * Copyright(c) 2024 Realtek Semiconductor Corp.
+ */
+
+#ifndef __RT721_H__
+#define __RT721_H__
+
+#include <linux/pm.h>
+#include <linux/regmap.h>
+#include <linux/soundwire/sdw.h>
+#include <linux/soundwire/sdw_type.h>
+#include <sound/soc.h>
+#include <linux/workqueue.h>
+
+struct  rt721_sdca_priv {
+	struct regmap *regmap;
+	struct regmap *mbq_regmap;
+	struct snd_soc_component *component;
+	struct sdw_slave *slave;
+	struct sdw_bus_params params;
+	bool hw_init;
+	bool first_hw_init;
+	struct mutex calibrate_mutex;
+	struct mutex disable_irq_lock;
+	bool disable_irq;
+	/* For Headset jack & Headphone */
+	unsigned int scp_sdca_stat1;
+	unsigned int scp_sdca_stat2;
+	struct snd_soc_jack *hs_jack;
+	struct delayed_work jack_detect_work;
+	struct delayed_work jack_btn_check_work;
+	int jack_type;
+	int jd_src;
+	bool fu0f_dapm_mute;
+	bool fu0f_mixer_l_mute;
+	bool fu0f_mixer_r_mute;
+	/* For DMIC */
+	bool fu1e_dapm_mute;
+	bool fu1e_mixer_mute[4];
+};
+
+struct rt721_sdca_dmic_kctrl_priv {
+	unsigned int reg_base;
+	unsigned int count;
+	unsigned int max;
+	unsigned int invert;
+};
+
+/* NID */
+#define RT721_ANA_POW_PART			0x01
+#define RT721_DAC_CTRL				0x04
+#define RT721_JD_CTRL				0x09
+#define RT721_CBJ_CTRL				0x0a
+#define RT721_CAP_PORT_CTRL			0x0c
+#define RT721_CLASD_AMP_CTRL			0x0d
+#define RT721_BOOST_CTRL			0x0f
+#define RT721_VENDOR_REG			0x20
+#define RT721_RC_CALIB_CTRL			0x40
+#define RT721_VENDOR_EQ_L			0x53
+#define RT721_VENDOR_EQ_R			0x54
+#define RT721_VENDOR_HP_CALI			0x56
+#define RT721_VENDOR_CHARGE_PUMP		0x57
+#define RT721_VENDOR_CLASD_CALI			0x58
+#define RT721_VENDOR_IMS_DRE			0x5b
+#define RT721_VENDOR_SPK_EFUSE			0x5c
+#define RT721_VENDOR_LEVEL_CTRL			0x5d
+#define RT721_VENDOR_ANA_CTL			0x5f
+#define RT721_HDA_SDCA_FLOAT			0x61
+
+/* Index (NID:01h) */
+#define RT721_MBIAS_LV_CTRL2			0x07
+#define RT721_VREF1_HV_CTRL1			0x0a
+#define RT721_VREF2_LV_CTRL1			0x0b
+
+/* Index (NID:04h) */
+#define RT721_DAC_2CH_CTRL3			0x02
+#define RT721_DAC_2CH_CTRL4			0x03
+
+/* Index (NID:09h) */
+#define RT721_JD_1PIN_GAT_CTRL2			0x07
+
+/* Index (NID:0ah) */
+#define RT721_CBJ_A0_GAT_CTRL1			0x04
+#define RT721_CBJ_A0_GAT_CTRL2			0x05
+
+/* Index (NID:0Ch) */
+#define RT721_HP_AMP_2CH_CAL1			0x05
+#define RT721_HP_AMP_2CH_CAL4			0x08
+#define RT721_HP_AMP_2CH_CAL18			0x1b
+
+/* Index (NID:0dh) */
+#define RT721_CLASD_AMP_2CH_CAL			0x14
+
+/* Index (NID:0fh) */
+#define RT721_BST_4CH_TOP_GATING_CTRL1		0x05
+
+/* Index (NID:20h) */
+#define RT721_JD_PRODUCT_NUM			0x00
+#define RT721_ANALOG_BIAS_CTL3			0x04
+#define RT721_JD_CTRL1				0x09
+#define RT721_LDO2_3_CTL1			0x0e
+#define RT721_GPIO_PAD_CTRL5			0x13
+#define RT721_LDO1_CTL				0x1a
+#define RT721_HP_JD_CTRL			0x24
+#define RT721_VD_HIDDEN_CTRL			0x26
+#define RT721_CLSD_CTRL6			0x3c
+#define RT721_COMBO_JACK_AUTO_CTL1		0x45
+#define RT721_COMBO_JACK_AUTO_CTL2		0x46
+#define RT721_COMBO_JACK_AUTO_CTL3		0x47
+#define RT721_DIGITAL_MISC_CTRL4		0x4a
+#define RT721_VREFO_GAT				0x63
+#define RT721_FSM_CTL				0x67
+#define RT721_SDCA_INTR_REC			0x82
+#define RT721_SW_CONFIG1			0x8a
+#define RT721_SW_CONFIG2			0x8b
+
+/* Index (NID:40h) */
+#define RT721_RC_CALIB_CTRL0			0x00
+
+/* Index (NID:58h) */
+#define RT721_DAC_DC_CALI_CTL1			0x01
+#define RT721_DAC_DC_CALI_CTL2			0x02
+#define RT721_DAC_DC_CALI_CTL3			0x03
+
+/* Index (NID:5fh) */
+#define RT721_MISC_POWER_CTL0			0x00
+#define RT721_MISC_POWER_CTL31			0x31
+#define RT721_UAJ_TOP_TCON13			0x44
+#define RT721_UAJ_TOP_TCON14			0x45
+#define RT721_UAJ_TOP_TCON17			0x48
+
+/* Index (NID:61h) */
+#define RT721_HDA_LEGACY_MUX_CTL0		0x00
+#define RT721_HDA_LEGACY_UAJ_CTL		0x02
+#define RT721_HDA_LEGACY_CTL1			0x05
+#define RT721_HDA_LEGACY_RESET_CTL		0x06
+#define RT721_MISC_CTL				0x07
+#define RT721_XU_REL_CTRL			0x0c
+#define RT721_GE_REL_CTRL1			0x0d
+#define RT721_HDA_LEGACY_GPIO_WAKE_EN_CTL	0x0e
+#define RT721_GE_SDCA_RST_CTRL			0x10
+#define RT721_INT_RST_EN_CTRL			0x11
+#define RT721_XU_EVENT_EN			0x13
+#define RT721_INLINE_CTL2			0x17
+#define RT721_UMP_HID_CTRL1			0x18
+#define RT721_UMP_HID_CTRL2			0x19
+#define RT721_UMP_HID_CTRL3			0x1a
+#define RT721_UMP_HID_CTRL4			0x1b
+#define RT721_UMP_HID_CTRL5			0x1c
+#define RT721_FUNC_FLOAT_CTL0			0x22
+#define RT721_FUNC_FLOAT_CTL1			0x23
+#define RT721_FUNC_FLOAT_CTL2			0x24
+#define RT721_FUNC_FLOAT_CTL3			0x25
+#define RT721_ENT_FLOAT_CTL0			0x29
+#define RT721_ENT_FLOAT_CTL1			0x2c
+#define RT721_ENT_FLOAT_CTL2			0x2d
+#define RT721_ENT_FLOAT_CTL3			0x2e
+#define RT721_ENT_FLOAT_CTL4			0x2f
+#define RT721_CH_FLOAT_CTL1			0x45
+#define RT721_CH_FLOAT_CTL2			0x46
+#define RT721_ENT_FLOAT_CTL5			0x53
+#define RT721_ENT_FLOAT_CTL6			0x54
+#define RT721_ENT_FLOAT_CTL7			0x55
+#define RT721_ENT_FLOAT_CTL8			0x57
+#define RT721_ENT_FLOAT_CTL9			0x5a
+#define RT721_ENT_FLOAT_CTL10			0x5b
+#define RT721_CH_FLOAT_CTL3			0x6a
+#define RT721_CH_FLOAT_CTL4			0x6d
+#define RT721_CH_FLOAT_CTL5			0x70
+#define RT721_CH_FLOAT_CTL6			0x92
+
+/* Parameter & Verb control 01 (0x26)(NID:20h) */
+#define RT721_HIDDEN_REG_SW_RESET (0x1 << 14)
+
+/* Buffer address for HID */
+#define RT721_BUF_ADDR_HID1			0x44030000
+#define RT721_BUF_ADDR_HID2			0x44030020
+
+/* RT721 SDCA Control - function number */
+#define FUNC_NUM_JACK_CODEC			0x01
+#define FUNC_NUM_MIC_ARRAY			0x02
+#define FUNC_NUM_HID				0x03
+#define FUNC_NUM_AMP				0x04
+
+/* RT721 SDCA entity */
+#define RT721_SDCA_ENT_HID01			0x01
+#define RT721_SDCA_ENT_XUV			0x03
+#define RT721_SDCA_ENT_GE49			0x49
+#define RT721_SDCA_ENT_USER_FU05		0x05
+#define RT721_SDCA_ENT_USER_FU06		0x06
+#define RT721_SDCA_ENT_USER_FU0F		0x0f
+#define RT721_SDCA_ENT_USER_FU10		0x19
+#define RT721_SDCA_ENT_USER_FU1E		0x1e
+#define RT721_SDCA_ENT_FU15			0x15
+#define RT721_SDCA_ENT_PDE23			0x23
+#define RT721_SDCA_ENT_PDE40			0x40
+#define RT721_SDCA_ENT_PDE41			0x41
+#define RT721_SDCA_ENT_PDE11			0x11
+#define RT721_SDCA_ENT_PDE12			0x12
+#define RT721_SDCA_ENT_PDE2A			0x2a
+#define RT721_SDCA_ENT_CS01			0x01
+#define RT721_SDCA_ENT_CS11			0x11
+#define RT721_SDCA_ENT_CS1F			0x1f
+#define RT721_SDCA_ENT_CS1C			0x1c
+#define RT721_SDCA_ENT_CS31			0x31
+#define RT721_SDCA_ENT_OT23			0x42
+#define RT721_SDCA_ENT_IT26			0x26
+#define RT721_SDCA_ENT_IT09			0x09
+#define RT721_SDCA_ENT_PLATFORM_FU15		0x15
+#define RT721_SDCA_ENT_PLATFORM_FU44		0x44
+#define RT721_SDCA_ENT_XU03			0x03
+#define RT721_SDCA_ENT_XU0D			0x0d
+#define RT721_SDCA_ENT_FU55			0x55
+
+/* RT721 SDCA control */
+#define RT721_SDCA_CTL_SAMPLE_FREQ_INDEX		0x10
+#define RT721_SDCA_CTL_FU_MUTE				0x01
+#define RT721_SDCA_CTL_FU_VOLUME			0x02
+#define RT721_SDCA_CTL_HIDTX_CURRENT_OWNER		0x10
+#define RT721_SDCA_CTL_HIDTX_SET_OWNER_TO_DEVICE	0x11
+#define RT721_SDCA_CTL_HIDTX_MESSAGE_OFFSET		0x12
+#define RT721_SDCA_CTL_HIDTX_MESSAGE_LENGTH		0x13
+#define RT721_SDCA_CTL_SELECTED_MODE			0x01
+#define RT721_SDCA_CTL_DETECTED_MODE			0x02
+#define RT721_SDCA_CTL_REQ_POWER_STATE			0x01
+#define RT721_SDCA_CTL_VENDOR_DEF			0x30
+#define RT721_SDCA_CTL_XUV				0x34
+#define RT721_SDCA_CTL_FU_CH_GAIN			0x0b
+
+/* RT721 SDCA channel */
+#define CH_L	0x01
+#define CH_R	0x02
+#define CH_01	0x01
+#define CH_02	0x02
+#define CH_03	0x03
+#define CH_04	0x04
+#define CH_08	0x08
+#define CH_09	0x09
+#define CH_0A	0x0a
+
+/* sample frequency index */
+#define RT721_SDCA_RATE_8000HZ		0x01
+#define RT721_SDCA_RATE_11025HZ		0x02
+#define RT721_SDCA_RATE_12000HZ		0x03
+#define RT721_SDCA_RATE_16000HZ		0x04
+#define RT721_SDCA_RATE_22050HZ		0x05
+#define RT721_SDCA_RATE_24000HZ		0x06
+#define RT721_SDCA_RATE_32000HZ		0x07
+#define RT721_SDCA_RATE_44100HZ		0x08
+#define RT721_SDCA_RATE_48000HZ		0x09
+#define RT721_SDCA_RATE_88200HZ		0x0a
+#define RT721_SDCA_RATE_96000HZ		0x0b
+#define RT721_SDCA_RATE_176400HZ	0x0c
+#define RT721_SDCA_RATE_192000HZ	0x0d
+#define RT721_SDCA_RATE_384000HZ	0x0e
+#define RT721_SDCA_RATE_768000HZ	0x0f
+
+/* RT721 HID ID */
+#define RT721_SDCA_HID_ID		0x11
+
+enum {
+	RT721_AIF1, /* For headset mic and headphone */
+	RT721_AIF2, /* For speaker */
+	RT721_AIF3, /* For dmic */
+	RT721_AIFS,
+};
+
+int rt721_sdca_io_init(struct device *dev, struct sdw_slave *slave);
+int rt721_sdca_init(struct device *dev, struct regmap *regmap,
+			struct regmap *mbq_regmap, struct sdw_slave *slave);
+#endif /* __RT721_H__ */