From 4617721c502b2ddaa4e324e86da4997edf738fa5 Mon Sep 17 00:00:00 2001 From: Steven Rostedt Date: Wed, 2 Sep 2026 09:55:01 -0400 Subject: ftrace: Synchronize the initialization of ftrace_ops 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 --- sound/soc/codecs/wm2000.h | 71 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 71 insertions(+) create mode 100644 sound/soc/codecs/wm2000.h (limited to 'sound/soc/codecs/wm2000.h') diff --git a/sound/soc/codecs/wm2000.h b/sound/soc/codecs/wm2000.h new file mode 100644 index 000000000..6d3241dea --- /dev/null +++ b/sound/soc/codecs/wm2000.h @@ -0,0 +1,71 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * wm2000.h -- WM2000 Soc Audio driver + */ + +#ifndef _WM2000_H +#define _WM2000_H + +#define WM2000_REG_SYS_START 0x8000 +#define WM2000_REG_ANC_GAIN_CTRL 0x8fa2 +#define WM2000_REG_MSE_TH2 0x8fdf +#define WM2000_REG_MSE_TH1 0x8fe0 +#define WM2000_REG_SPEECH_CLARITY 0x8fef +#define WM2000_REG_SYS_WATCHDOG 0x8ff6 +#define WM2000_REG_ANA_VMID_PD_TIME 0x8ff7 +#define WM2000_REG_ANA_VMID_PU_TIME 0x8ff8 +#define WM2000_REG_CAT_FLTR_INDX 0x8ff9 +#define WM2000_REG_CAT_GAIN_0 0x8ffa +#define WM2000_REG_SYS_STATUS 0x8ffc +#define WM2000_REG_SYS_MODE_CNTRL 0x8ffd +#define WM2000_REG_SYS_START0 0x8ffe +#define WM2000_REG_SYS_START1 0x8fff +#define WM2000_REG_ID1 0xf000 +#define WM2000_REG_ID2 0xf001 +#define WM2000_REG_REVISON 0xf002 +#define WM2000_REG_SYS_CTL1 0xf003 +#define WM2000_REG_SYS_CTL2 0xf004 +#define WM2000_REG_ANC_STAT 0xf005 +#define WM2000_REG_IF_CTL 0xf006 +#define WM2000_REG_ANA_MIC_CTL 0xf028 +#define WM2000_REG_SPK_CTL 0xf034 + +/* SPEECH_CLARITY */ +#define WM2000_SPEECH_CLARITY 0x01 + +/* SYS_STATUS */ +#define WM2000_STATUS_MOUSE_ACTIVE 0x40 +#define WM2000_STATUS_CAT_FREQ_COMPLETE 0x20 +#define WM2000_STATUS_CAT_GAIN_COMPLETE 0x10 +#define WM2000_STATUS_THERMAL_SHUTDOWN_COMPLETE 0x08 +#define WM2000_STATUS_ANC_DISABLED 0x04 +#define WM2000_STATUS_POWER_DOWN_COMPLETE 0x02 +#define WM2000_STATUS_BOOT_COMPLETE 0x01 + +/* SYS_MODE_CNTRL */ +#define WM2000_MODE_ANA_SEQ_INCLUDE 0x80 +#define WM2000_MODE_MOUSE_ENABLE 0x40 +#define WM2000_MODE_CAT_FREQ_ENABLE 0x20 +#define WM2000_MODE_CAT_GAIN_ENABLE 0x10 +#define WM2000_MODE_BYPASS_ENTRY 0x08 +#define WM2000_MODE_STANDBY_ENTRY 0x04 +#define WM2000_MODE_THERMAL_ENABLE 0x02 +#define WM2000_MODE_POWER_DOWN 0x01 + +/* SYS_CTL1 */ +#define WM2000_SYS_STBY 0x01 + +/* SYS_CTL2 */ +#define WM2000_MCLK_DIV2_ENA_CLR 0x80 +#define WM2000_MCLK_DIV2_ENA_SET 0x40 +#define WM2000_ANC_ENG_CLR 0x20 +#define WM2000_ANC_ENG_SET 0x10 +#define WM2000_ANC_INT_N_CLR 0x08 +#define WM2000_ANC_INT_N_SET 0x04 +#define WM2000_RAM_CLR 0x02 +#define WM2000_RAM_SET 0x01 + +/* ANC_STAT */ +#define WM2000_ANC_ENG_IDLE 0x01 + +#endif -- cgit v1.3.1