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>

6 files changed, 277 insertions, 0 deletions

diff --git a/include/dt-bindings/input/atmel-maxtouch.h b/include/dt-bindings/input/atmel-maxtouch.h
new file mode 100644
index 000000000..7345ab322
--- /dev/null
+++ b/include/dt-bindings/input/atmel-maxtouch.h
@@ -0,0 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+
+#ifndef _DT_BINDINGS_ATMEL_MAXTOUCH_H
+#define _DT_BINDINGS_ATMEL_MAXTOUCH_H
+
+#define ATMEL_MXT_WAKEUP_NONE		0
+#define ATMEL_MXT_WAKEUP_I2C_SCL	1
+#define ATMEL_MXT_WAKEUP_GPIO		2
+
+#endif /* _DT_BINDINGS_ATMEL_MAXTOUCH_H */
diff --git a/include/dt-bindings/input/cros-ec-keyboard.h b/include/dt-bindings/input/cros-ec-keyboard.h
new file mode 100644
index 000000000..afc12f6aa
--- /dev/null
+++ b/include/dt-bindings/input/cros-ec-keyboard.h
@@ -0,0 +1,207 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * This header provides the constants of the standard Chrome OS key matrix
+ * for cros-ec keyboard-controller bindings.
+ *
+ * Copyright (c) 2021 Google, Inc
+ */
+
+#ifndef _CROS_EC_KEYBOARD_H
+#define _CROS_EC_KEYBOARD_H
+
+#define CROS_STD_TOP_ROW_KEYMAP	\
+	MATRIX_KEY(0x00, 0x02, KEY_F1)	\
+	MATRIX_KEY(0x03, 0x02, KEY_F2)	\
+	MATRIX_KEY(0x02, 0x02, KEY_F3)	\
+	MATRIX_KEY(0x01, 0x02, KEY_F4)	\
+	MATRIX_KEY(0x03, 0x04, KEY_F5)	\
+	MATRIX_KEY(0x02, 0x04, KEY_F6)	\
+	MATRIX_KEY(0x01, 0x04, KEY_F7)	\
+	MATRIX_KEY(0x02, 0x09, KEY_F8)	\
+	MATRIX_KEY(0x01, 0x09, KEY_F9)	\
+	MATRIX_KEY(0x00, 0x04, KEY_F10)
+
+#define CROS_STD_MAIN_KEYMAP	\
+	MATRIX_KEY(0x00, 0x01, KEY_LEFTMETA)	\
+	MATRIX_KEY(0x00, 0x03, KEY_B)		\
+	MATRIX_KEY(0x00, 0x05, KEY_RO)		\
+	MATRIX_KEY(0x00, 0x06, KEY_N)		\
+	MATRIX_KEY(0x00, 0x08, KEY_EQUAL)	\
+	MATRIX_KEY(0x00, 0x0a, KEY_RIGHTALT)	\
+	MATRIX_KEY(0x01, 0x01, KEY_ESC)		\
+	MATRIX_KEY(0x01, 0x03, KEY_G)		\
+	MATRIX_KEY(0x01, 0x06, KEY_H)		\
+	MATRIX_KEY(0x01, 0x08, KEY_APOSTROPHE)	\
+	MATRIX_KEY(0x01, 0x0b, KEY_BACKSPACE)	\
+	MATRIX_KEY(0x01, 0x0c, KEY_HENKAN)	\
+						\
+	MATRIX_KEY(0x02, 0x00, KEY_LEFTCTRL)	\
+	MATRIX_KEY(0x02, 0x01, KEY_TAB)		\
+	MATRIX_KEY(0x02, 0x03, KEY_T)		\
+	MATRIX_KEY(0x02, 0x05, KEY_RIGHTBRACE)	\
+	MATRIX_KEY(0x02, 0x06, KEY_Y)		\
+	MATRIX_KEY(0x02, 0x07, KEY_102ND)	\
+	MATRIX_KEY(0x02, 0x08, KEY_LEFTBRACE)	\
+	MATRIX_KEY(0x02, 0x0a, KEY_YEN)		\
+						\
+	MATRIX_KEY(0x03, 0x00, KEY_LEFTMETA)	\
+	MATRIX_KEY(0x03, 0x01, KEY_GRAVE)	\
+	MATRIX_KEY(0x03, 0x03, KEY_5)		\
+	MATRIX_KEY(0x03, 0x06, KEY_6)		\
+	MATRIX_KEY(0x03, 0x08, KEY_MINUS)	\
+	MATRIX_KEY(0x03, 0x09, KEY_SLEEP)	\
+	MATRIX_KEY(0x03, 0x0b, KEY_BACKSLASH)	\
+	MATRIX_KEY(0x03, 0x0c, KEY_MUHENKAN)	\
+						\
+	MATRIX_KEY(0x04, 0x00, KEY_RIGHTCTRL)	\
+	MATRIX_KEY(0x04, 0x01, KEY_A)		\
+	MATRIX_KEY(0x04, 0x02, KEY_D)		\
+	MATRIX_KEY(0x04, 0x03, KEY_F)		\
+	MATRIX_KEY(0x04, 0x04, KEY_S)		\
+	MATRIX_KEY(0x04, 0x05, KEY_K)		\
+	MATRIX_KEY(0x04, 0x06, KEY_J)		\
+	MATRIX_KEY(0x04, 0x08, KEY_SEMICOLON)	\
+	MATRIX_KEY(0x04, 0x09, KEY_L)		\
+	MATRIX_KEY(0x04, 0x0a, KEY_BACKSLASH)	\
+	MATRIX_KEY(0x04, 0x0b, KEY_ENTER)	\
+						\
+	MATRIX_KEY(0x05, 0x01, KEY_Z)		\
+	MATRIX_KEY(0x05, 0x02, KEY_C)		\
+	MATRIX_KEY(0x05, 0x03, KEY_V)		\
+	MATRIX_KEY(0x05, 0x04, KEY_X)		\
+	MATRIX_KEY(0x05, 0x05, KEY_COMMA)	\
+	MATRIX_KEY(0x05, 0x06, KEY_M)		\
+	MATRIX_KEY(0x05, 0x07, KEY_LEFTSHIFT)	\
+	MATRIX_KEY(0x05, 0x08, KEY_SLASH)	\
+	MATRIX_KEY(0x05, 0x09, KEY_DOT)		\
+	MATRIX_KEY(0x05, 0x0b, KEY_SPACE)	\
+						\
+	MATRIX_KEY(0x06, 0x01, KEY_1)		\
+	MATRIX_KEY(0x06, 0x02, KEY_3)		\
+	MATRIX_KEY(0x06, 0x03, KEY_4)		\
+	MATRIX_KEY(0x06, 0x04, KEY_2)		\
+	MATRIX_KEY(0x06, 0x05, KEY_8)		\
+	MATRIX_KEY(0x06, 0x06, KEY_7)		\
+	MATRIX_KEY(0x06, 0x08, KEY_0)		\
+	MATRIX_KEY(0x06, 0x09, KEY_9)		\
+	MATRIX_KEY(0x06, 0x0a, KEY_LEFTALT)	\
+	MATRIX_KEY(0x06, 0x0b, KEY_DOWN)	\
+	MATRIX_KEY(0x06, 0x0c, KEY_RIGHT)	\
+						\
+	MATRIX_KEY(0x07, 0x01, KEY_Q)		\
+	MATRIX_KEY(0x07, 0x02, KEY_E)		\
+	MATRIX_KEY(0x07, 0x03, KEY_R)		\
+	MATRIX_KEY(0x07, 0x04, KEY_W)		\
+	MATRIX_KEY(0x07, 0x05, KEY_I)		\
+	MATRIX_KEY(0x07, 0x06, KEY_U)		\
+	MATRIX_KEY(0x07, 0x07, KEY_RIGHTSHIFT)	\
+	MATRIX_KEY(0x07, 0x08, KEY_P)		\
+	MATRIX_KEY(0x07, 0x09, KEY_O)		\
+	MATRIX_KEY(0x07, 0x0b, KEY_UP)		\
+	MATRIX_KEY(0x07, 0x0c, KEY_LEFT)
+
+/* No numpad */
+#define CROS_TOP_ROW_KEYMAP_V30 \
+	MATRIX_KEY(0x00, 0x01, KEY_F11)		/* T11 */	\
+	MATRIX_KEY(0x00, 0x02, KEY_F1)		/* T1 */	\
+	MATRIX_KEY(0x00, 0x04, KEY_F10)		/* T10 */	\
+	MATRIX_KEY(0x00, 0x0b, KEY_F14)		/* T14 */	\
+	MATRIX_KEY(0x00, 0x0c, KEY_F15)		/* T15 */	\
+	MATRIX_KEY(0x01, 0x02, KEY_F4)		/* T4 */	\
+	MATRIX_KEY(0x01, 0x04, KEY_F7)		/* T7 */	\
+	MATRIX_KEY(0x01, 0x05, KEY_F12)		/* T12 */	\
+	MATRIX_KEY(0x01, 0x09, KEY_F9)		/* T9 */	\
+	MATRIX_KEY(0x02, 0x02, KEY_F3)		/* T3 */	\
+	MATRIX_KEY(0x02, 0x04, KEY_F6)		/* T6 */	\
+	MATRIX_KEY(0x02, 0x0b, KEY_F8)		/* T8 */	\
+	MATRIX_KEY(0x03, 0x02, KEY_F2)		/* T2 */	\
+	MATRIX_KEY(0x03, 0x05, KEY_F13)		/* T13 */	\
+	MATRIX_KEY(0x04, 0x04, KEY_F5)		/* T5 */
+
+#define CROS_MAIN_KEYMAP_V30			/* Keycode */	\
+	MATRIX_KEY(0x00, 0x03, KEY_B)		/* 50 */	\
+	MATRIX_KEY(0x00, 0x05, KEY_N)		/* 51 */	\
+	MATRIX_KEY(0x00, 0x06, KEY_RO)		/* 56 (JIS) */	\
+	MATRIX_KEY(0x00, 0x08, KEY_EQUAL)	/* 13 */	\
+	MATRIX_KEY(0x00, 0x09, KEY_HOME)	/* 80 (Numpad) */	\
+	MATRIX_KEY(0x00, 0x0a, KEY_RIGHTALT)	/* 62 */	\
+	MATRIX_KEY(0x00, 0x10, KEY_FN)		/* 127 */	\
+								\
+	MATRIX_KEY(0x01, 0x01, KEY_ESC)		/* 110 */	\
+	MATRIX_KEY(0x01, 0x03, KEY_G)		/* 35 */	\
+	MATRIX_KEY(0x01, 0x06, KEY_H)		/* 36 */	\
+	MATRIX_KEY(0x01, 0x08, KEY_APOSTROPHE)	/* 41 */	\
+	MATRIX_KEY(0x01, 0x0b, KEY_BACKSPACE)	/* 15 */	\
+	MATRIX_KEY(0x01, 0x0c, KEY_HENKAN)	/* 65 (JIS) */	\
+	MATRIX_KEY(0x01, 0x0e, KEY_LEFTCTRL)	/* 58 */	\
+								\
+	MATRIX_KEY(0x02, 0x01, KEY_TAB)		/* 16 */	\
+	MATRIX_KEY(0x02, 0x03, KEY_T)		/* 21 */	\
+	MATRIX_KEY(0x02, 0x05, KEY_RIGHTBRACE)	/* 28 */	\
+	MATRIX_KEY(0x02, 0x06, KEY_Y)		/* 22 */	\
+	MATRIX_KEY(0x02, 0x08, KEY_LEFTBRACE)	/* 27 */	\
+	MATRIX_KEY(0x02, 0x09, KEY_DELETE)	/* 76 (Numpad) */	\
+	MATRIX_KEY(0x02, 0x0c, KEY_PAGEUP)	/* 85 (Numpad) */	\
+	MATRIX_KEY(0x02, 0x011, KEY_YEN)	/* 14 (JIS) */	\
+								\
+	MATRIX_KEY(0x03, 0x00, KEY_LEFTMETA)	/* Launcher */	\
+	MATRIX_KEY(0x03, 0x01, KEY_GRAVE)	/* 1 */	\
+	MATRIX_KEY(0x03, 0x03, KEY_5)		/* 6 */	\
+	MATRIX_KEY(0x03, 0x04, KEY_S)		/* 32 */	\
+	MATRIX_KEY(0x03, 0x06, KEY_MINUS)	/* 12 */	\
+	MATRIX_KEY(0x03, 0x08, KEY_6)		/* 7 */		\
+	MATRIX_KEY(0x03, 0x09, KEY_SLEEP)	/* Lock */	\
+	MATRIX_KEY(0x03, 0x0b, KEY_BACKSLASH)	/* 29 */	\
+	MATRIX_KEY(0x03, 0x0c, KEY_MUHENKAN)	/* 63 (JIS) */	\
+	MATRIX_KEY(0x03, 0x0e, KEY_RIGHTCTRL)	/* 64 */	\
+								\
+	MATRIX_KEY(0x04, 0x01, KEY_A)		/* 31 */	\
+	MATRIX_KEY(0x04, 0x02, KEY_D)		/* 33 */	\
+	MATRIX_KEY(0x04, 0x03, KEY_F)		/* 34 */	\
+	MATRIX_KEY(0x04, 0x05, KEY_K)		/* 38 */	\
+	MATRIX_KEY(0x04, 0x06, KEY_J)		/* 37 */	\
+	MATRIX_KEY(0x04, 0x08, KEY_SEMICOLON)	/* 40 */	\
+	MATRIX_KEY(0x04, 0x09, KEY_L)		/* 39 */	\
+	MATRIX_KEY(0x04, 0x0b, KEY_ENTER)	/* 43 */	\
+	MATRIX_KEY(0x04, 0x0c, KEY_END)		/* 81 (Numpad) */	\
+								\
+	MATRIX_KEY(0x05, 0x01, KEY_1)		/* 2 */	\
+	MATRIX_KEY(0x05, 0x02, KEY_COMMA)	/* 53 */	\
+	MATRIX_KEY(0x05, 0x03, KEY_DOT)		/* 54 */	\
+	MATRIX_KEY(0x05, 0x04, KEY_SLASH)	/* 55 */	\
+	MATRIX_KEY(0x05, 0x05, KEY_C)		/* 48 */	\
+	MATRIX_KEY(0x05, 0x06, KEY_SPACE)	/* 61 */	\
+	MATRIX_KEY(0x05, 0x07, KEY_LEFTSHIFT)	/* 44 */	\
+	MATRIX_KEY(0x05, 0x08, KEY_X)		/* 47 */	\
+	MATRIX_KEY(0x05, 0x09, KEY_V)		/* 49 */	\
+	MATRIX_KEY(0x05, 0x0b, KEY_M)		/* 52 */	\
+	MATRIX_KEY(0x05, 0x0c, KEY_PAGEDOWN)	/* 86 (Numpad) */	\
+								\
+	MATRIX_KEY(0x06, 0x01, KEY_Z)		/* 46 */	\
+	MATRIX_KEY(0x06, 0x02, KEY_3)		/* 4 */		\
+	MATRIX_KEY(0x06, 0x03, KEY_4)		/* 5 */		\
+	MATRIX_KEY(0x06, 0x04, KEY_2)		/* 3 */		\
+	MATRIX_KEY(0x06, 0x05, KEY_8)		/* 9 */		\
+	MATRIX_KEY(0x06, 0x06, KEY_0)		/* 11 */	\
+	MATRIX_KEY(0x06, 0x08, KEY_7)		/* 8 */		\
+	MATRIX_KEY(0x06, 0x09, KEY_9)		/* 10 */	\
+	MATRIX_KEY(0x06, 0x0b, KEY_DOWN)	/* 84 */	\
+	MATRIX_KEY(0x06, 0x0c, KEY_RIGHT)	/* 89 */	\
+	MATRIX_KEY(0x06, 0x0d, KEY_LEFTALT)	/* 60 */	\
+	MATRIX_KEY(0x06, 0x0f, KEY_ASSISTANT)	/* 128 */	\
+	MATRIX_KEY(0x06, 0x11, KEY_BACKSLASH)	/* 42 (JIS, ISO) */	\
+								\
+	MATRIX_KEY(0x07, 0x01, KEY_U)		/* 23 */	\
+	MATRIX_KEY(0x07, 0x02, KEY_I)		/* 24 */	\
+	MATRIX_KEY(0x07, 0x03, KEY_O)		/* 25 */	\
+	MATRIX_KEY(0x07, 0x04, KEY_P)		/* 26 */	\
+	MATRIX_KEY(0x07, 0x05, KEY_Q)		/* 17 */	\
+	MATRIX_KEY(0x07, 0x06, KEY_W)		/* 18 */	\
+	MATRIX_KEY(0x07, 0x07, KEY_RIGHTSHIFT)	/* 57 */	\
+	MATRIX_KEY(0x07, 0x08, KEY_E)		/* 19 */	\
+	MATRIX_KEY(0x07, 0x09, KEY_R)		/* 20 */	\
+	MATRIX_KEY(0x07, 0x0b, KEY_UP)		/* 83 */	\
+	MATRIX_KEY(0x07, 0x0c, KEY_LEFT)	/* 79 */	\
+	MATRIX_KEY(0x07, 0x11, KEY_102ND)	/* 45 (ISO) */
+
+#endif /* _CROS_EC_KEYBOARD_H */
diff --git a/include/dt-bindings/input/gpio-keys.h b/include/dt-bindings/input/gpio-keys.h
new file mode 100644
index 000000000..8962df79e
--- /dev/null
+++ b/include/dt-bindings/input/gpio-keys.h
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * This header provides constants for gpio keys bindings.
+ */
+
+#ifndef _DT_BINDINGS_GPIO_KEYS_H
+#define _DT_BINDINGS_GPIO_KEYS_H
+
+#define EV_ACT_ANY		0x00	/* asserted or deasserted */
+#define EV_ACT_ASSERTED		0x01	/* asserted */
+#define EV_ACT_DEASSERTED	0x02	/* deasserted */
+
+#endif /* _DT_BINDINGS_GPIO_KEYS_H */
diff --git a/include/dt-bindings/input/input.h b/include/dt-bindings/input/input.h
new file mode 100644
index 000000000..bcf0ae100
--- /dev/null
+++ b/include/dt-bindings/input/input.h
@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * This header provides constants for most input bindings.
+ *
+ * Most input bindings include key code, matrix key code format.
+ * In most cases, key code and matrix key code format uses
+ * the standard values/macro defined in this header.
+ */
+
+#ifndef _DT_BINDINGS_INPUT_INPUT_H
+#define _DT_BINDINGS_INPUT_INPUT_H
+
+#include "linux-event-codes.h"
+
+#define MATRIX_KEY(row, col, code)	\
+	((((row) & 0xFF) << 24) | (((col) & 0xFF) << 16) | ((code) & 0xFFFF))
+
+#endif /* _DT_BINDINGS_INPUT_INPUT_H */
diff --git a/include/dt-bindings/input/linux-event-codes.h b/include/dt-bindings/input/linux-event-codes.h
new file mode 120000
index 000000000..693bbcd26
--- /dev/null
+++ b/include/dt-bindings/input/linux-event-codes.h
@@ -0,0 +1 @@
+../../uapi/linux/input-event-codes.h
\ No newline at end of file
diff --git a/include/dt-bindings/input/ti-drv260x.h b/include/dt-bindings/input/ti-drv260x.h
new file mode 100644
index 000000000..af71082dd
--- /dev/null
+++ b/include/dt-bindings/input/ti-drv260x.h
@@ -0,0 +1,28 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * DRV260X haptics driver family
+ *
+ * Author: Dan Murphy <dmurphy@ti.com>
+ *
+ * Copyright:   (C) 2014 Texas Instruments, Inc.
+ */
+
+#ifndef _DT_BINDINGS_TI_DRV260X_H
+#define _DT_BINDINGS_TI_DRV260X_H
+
+/* Calibration Types */
+#define DRV260X_LRA_MODE		0x00
+#define DRV260X_LRA_NO_CAL_MODE	0x01
+#define DRV260X_ERM_MODE		0x02
+
+/* Library Selection */
+#define DRV260X_LIB_EMPTY			0x00
+#define DRV260X_ERM_LIB_A			0x01
+#define DRV260X_ERM_LIB_B			0x02
+#define DRV260X_ERM_LIB_C			0x03
+#define DRV260X_ERM_LIB_D			0x04
+#define DRV260X_ERM_LIB_E			0x05
+#define DRV260X_LIB_LRA			0x06
+#define DRV260X_ERM_LIB_F			0x07
+
+#endif