* [PATCH AUTOSEL 6.12 144/486] hwmon: (dell-smm) Increment the number of fans
[not found] <20250505223922.2682012-1-sashal@kernel.org>
@ 2025-05-05 22:33 ` Sasha Levin
2025-05-05 22:34 ` [PATCH AUTOSEL 6.12 223/486] x86/bugs: Make spectre user default depend on MITIGATION_SPECTRE_V2 Sasha Levin
2025-05-05 22:36 ` [PATCH AUTOSEL 6.12 306/486] serial: mctrl_gpio: split disable_ms into sync and no_sync APIs Sasha Levin
2 siblings, 0 replies; 3+ messages in thread
From: Sasha Levin @ 2025-05-05 22:33 UTC (permalink / raw)
To: linux-kernel, stable
Cc: Kurt Borja, Guenter Roeck, Sasha Levin, jdelvare, corbet, pali,
linux-hwmon, linux-doc
From: Kurt Borja <kuurtb@gmail.com>
[ Upstream commit dbcfcb239b3b452ef8782842c36fb17dd1b9092f ]
Some Alienware laptops that support the SMM interface, may have up to 4
fans.
Tested on an Alienware x15 r1.
Signed-off-by: Kurt Borja <kuurtb@gmail.com>
Link: https://lore.kernel.org/r/20250304055249.51940-2-kuurtb@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
Documentation/hwmon/dell-smm-hwmon.rst | 14 +++++++-------
drivers/hwmon/dell-smm-hwmon.c | 5 ++++-
2 files changed, 11 insertions(+), 8 deletions(-)
diff --git a/Documentation/hwmon/dell-smm-hwmon.rst b/Documentation/hwmon/dell-smm-hwmon.rst
index 74905675d71f9..5a4edb6565cf9 100644
--- a/Documentation/hwmon/dell-smm-hwmon.rst
+++ b/Documentation/hwmon/dell-smm-hwmon.rst
@@ -32,12 +32,12 @@ Temperature sensors and fans can be queried and set via the standard
=============================== ======= =======================================
Name Perm Description
=============================== ======= =======================================
-fan[1-3]_input RO Fan speed in RPM.
-fan[1-3]_label RO Fan label.
-fan[1-3]_min RO Minimal Fan speed in RPM
-fan[1-3]_max RO Maximal Fan speed in RPM
-fan[1-3]_target RO Expected Fan speed in RPM
-pwm[1-3] RW Control the fan PWM duty-cycle.
+fan[1-4]_input RO Fan speed in RPM.
+fan[1-4]_label RO Fan label.
+fan[1-4]_min RO Minimal Fan speed in RPM
+fan[1-4]_max RO Maximal Fan speed in RPM
+fan[1-4]_target RO Expected Fan speed in RPM
+pwm[1-4] RW Control the fan PWM duty-cycle.
pwm1_enable WO Enable or disable automatic BIOS fan
control (not supported on all laptops,
see below for details).
@@ -93,7 +93,7 @@ Again, when you find new codes, we'd be happy to have your patches!
---------------------------
The driver also exports the fans as thermal cooling devices with
-``type`` set to ``dell-smm-fan[1-3]``. This allows for easy fan control
+``type`` set to ``dell-smm-fan[1-4]``. This allows for easy fan control
using one of the thermal governors.
Module parameters
diff --git a/drivers/hwmon/dell-smm-hwmon.c b/drivers/hwmon/dell-smm-hwmon.c
index f5bdf842040e6..b043fbd15c9da 100644
--- a/drivers/hwmon/dell-smm-hwmon.c
+++ b/drivers/hwmon/dell-smm-hwmon.c
@@ -73,7 +73,7 @@
#define DELL_SMM_LEGACY_EXECUTE 0x1
#define DELL_SMM_NO_TEMP 10
-#define DELL_SMM_NO_FANS 3
+#define DELL_SMM_NO_FANS 4
struct smm_regs {
unsigned int eax;
@@ -1074,11 +1074,14 @@ static const struct hwmon_channel_info * const dell_smm_info[] = {
HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MIN | HWMON_F_MAX |
HWMON_F_TARGET,
HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MIN | HWMON_F_MAX |
+ HWMON_F_TARGET,
+ HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_MIN | HWMON_F_MAX |
HWMON_F_TARGET
),
HWMON_CHANNEL_INFO(pwm,
HWMON_PWM_INPUT | HWMON_PWM_ENABLE,
HWMON_PWM_INPUT,
+ HWMON_PWM_INPUT,
HWMON_PWM_INPUT
),
NULL
--
2.39.5
^ permalink raw reply related [flat|nested] 3+ messages in thread
* [PATCH AUTOSEL 6.12 223/486] x86/bugs: Make spectre user default depend on MITIGATION_SPECTRE_V2
[not found] <20250505223922.2682012-1-sashal@kernel.org>
2025-05-05 22:33 ` [PATCH AUTOSEL 6.12 144/486] hwmon: (dell-smm) Increment the number of fans Sasha Levin
@ 2025-05-05 22:34 ` Sasha Levin
2025-05-05 22:36 ` [PATCH AUTOSEL 6.12 306/486] serial: mctrl_gpio: split disable_ms into sync and no_sync APIs Sasha Levin
2 siblings, 0 replies; 3+ messages in thread
From: Sasha Levin @ 2025-05-05 22:34 UTC (permalink / raw)
To: linux-kernel, stable
Cc: Breno Leitao, Ingo Molnar, Pawan Gupta, Josh Poimboeuf,
Peter Zijlstra, David Kaplan, Sasha Levin, corbet, tglx, bp,
mingo, dave.hansen, x86, akpm, paulmck, rostedt, thuth, ardb,
gregkh, linux-doc
From: Breno Leitao <leitao@debian.org>
[ Upstream commit 98fdaeb296f51ef08e727a7cc72e5b5c864c4f4d ]
Change the default value of spectre v2 in user mode to respect the
CONFIG_MITIGATION_SPECTRE_V2 config option.
Currently, user mode spectre v2 is set to auto
(SPECTRE_V2_USER_CMD_AUTO) by default, even if
CONFIG_MITIGATION_SPECTRE_V2 is disabled.
Set the spectre_v2 value to auto (SPECTRE_V2_USER_CMD_AUTO) if the
Spectre v2 config (CONFIG_MITIGATION_SPECTRE_V2) is enabled, otherwise
set the value to none (SPECTRE_V2_USER_CMD_NONE).
Important to say the command line argument "spectre_v2_user" overwrites
the default value in both cases.
When CONFIG_MITIGATION_SPECTRE_V2 is not set, users have the flexibility
to opt-in for specific mitigations independently. In this scenario,
setting spectre_v2= will not enable spectre_v2_user=, and command line
options spectre_v2_user and spectre_v2 are independent when
CONFIG_MITIGATION_SPECTRE_V2=n.
Signed-off-by: Breno Leitao <leitao@debian.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
Acked-by: Josh Poimboeuf <jpoimboe@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: David Kaplan <David.Kaplan@amd.com>
Link: https://lore.kernel.org/r/20241031-x86_bugs_last_v2-v2-2-b7ff1dab840e@debian.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
Documentation/admin-guide/kernel-parameters.txt | 2 ++
arch/x86/kernel/cpu/bugs.c | 10 +++++++---
2 files changed, 9 insertions(+), 3 deletions(-)
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 607a8937f1754..6e7b300b5c1d9 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -6243,6 +6243,8 @@
Selecting 'on' will also enable the mitigation
against user space to user space task attacks.
+ Selecting specific mitigation does not force enable
+ user mitigations.
Selecting 'off' will disable both the kernel and
the user space protections.
diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c
index 46bddb5bb15ff..e9f3103720396 100644
--- a/arch/x86/kernel/cpu/bugs.c
+++ b/arch/x86/kernel/cpu/bugs.c
@@ -1293,9 +1293,13 @@ static __ro_after_init enum spectre_v2_mitigation_cmd spectre_v2_cmd;
static enum spectre_v2_user_cmd __init
spectre_v2_parse_user_cmdline(void)
{
+ enum spectre_v2_user_cmd mode;
char arg[20];
int ret, i;
+ mode = IS_ENABLED(CONFIG_MITIGATION_SPECTRE_V2) ?
+ SPECTRE_V2_USER_CMD_AUTO : SPECTRE_V2_USER_CMD_NONE;
+
switch (spectre_v2_cmd) {
case SPECTRE_V2_CMD_NONE:
return SPECTRE_V2_USER_CMD_NONE;
@@ -1308,7 +1312,7 @@ spectre_v2_parse_user_cmdline(void)
ret = cmdline_find_option(boot_command_line, "spectre_v2_user",
arg, sizeof(arg));
if (ret < 0)
- return SPECTRE_V2_USER_CMD_AUTO;
+ return mode;
for (i = 0; i < ARRAY_SIZE(v2_user_options); i++) {
if (match_option(arg, ret, v2_user_options[i].option)) {
@@ -1318,8 +1322,8 @@ spectre_v2_parse_user_cmdline(void)
}
}
- pr_err("Unknown user space protection option (%s). Switching to AUTO select\n", arg);
- return SPECTRE_V2_USER_CMD_AUTO;
+ pr_err("Unknown user space protection option (%s). Switching to default\n", arg);
+ return mode;
}
static inline bool spectre_v2_in_ibrs_mode(enum spectre_v2_mitigation mode)
--
2.39.5
^ permalink raw reply related [flat|nested] 3+ messages in thread
* [PATCH AUTOSEL 6.12 306/486] serial: mctrl_gpio: split disable_ms into sync and no_sync APIs
[not found] <20250505223922.2682012-1-sashal@kernel.org>
2025-05-05 22:33 ` [PATCH AUTOSEL 6.12 144/486] hwmon: (dell-smm) Increment the number of fans Sasha Levin
2025-05-05 22:34 ` [PATCH AUTOSEL 6.12 223/486] x86/bugs: Make spectre user default depend on MITIGATION_SPECTRE_V2 Sasha Levin
@ 2025-05-05 22:36 ` Sasha Levin
2 siblings, 0 replies; 3+ messages in thread
From: Sasha Levin @ 2025-05-05 22:36 UTC (permalink / raw)
To: linux-kernel, stable
Cc: Alexis Lothoré, Jiri Slaby, Richard Genoud,
Greg Kroah-Hartman, Sasha Levin, corbet, nicolas.ferre,
alexandre.belloni, claudiu.beznea, shawnguo, mcoquelin.stm32,
alexandre.torgue, john.ogness, pmladek, arnd, andriy.shevchenko,
namcao, benjamin.larsson, schnelle, esben, stefan.eichenberger,
tglx, linux, marex, jeff.johnson, linux, geert+renesas,
wsa+renesas, prabhakar.mahadev-lad.rj, cheick.traore,
ben.wolsieffer, u.kleine-koenig, linux-serial, linux-doc,
linux-arm-kernel, imx, linux-stm32
From: Alexis Lothoré <alexis.lothore@bootlin.com>
[ Upstream commit 1bd2aad57da95f7f2d2bb52f7ad15c0f4993a685 ]
The following splat has been observed on a SAMA5D27 platform using
atmel_serial:
BUG: sleeping function called from invalid context at kernel/irq/manage.c:738
in_atomic(): 1, irqs_disabled(): 128, non_block: 0, pid: 27, name: kworker/u5:0
preempt_count: 1, expected: 0
INFO: lockdep is turned off.
irq event stamp: 0
hardirqs last enabled at (0): [<00000000>] 0x0
hardirqs last disabled at (0): [<c01588f0>] copy_process+0x1c4c/0x7bec
softirqs last enabled at (0): [<c0158944>] copy_process+0x1ca0/0x7bec
softirqs last disabled at (0): [<00000000>] 0x0
CPU: 0 UID: 0 PID: 27 Comm: kworker/u5:0 Not tainted 6.13.0-rc7+ #74
Hardware name: Atmel SAMA5
Workqueue: hci0 hci_power_on [bluetooth]
Call trace:
unwind_backtrace from show_stack+0x18/0x1c
show_stack from dump_stack_lvl+0x44/0x70
dump_stack_lvl from __might_resched+0x38c/0x598
__might_resched from disable_irq+0x1c/0x48
disable_irq from mctrl_gpio_disable_ms+0x74/0xc0
mctrl_gpio_disable_ms from atmel_disable_ms.part.0+0x80/0x1f4
atmel_disable_ms.part.0 from atmel_set_termios+0x764/0x11e8
atmel_set_termios from uart_change_line_settings+0x15c/0x994
uart_change_line_settings from uart_set_termios+0x2b0/0x668
uart_set_termios from tty_set_termios+0x600/0x8ec
tty_set_termios from ttyport_set_flow_control+0x188/0x1e0
ttyport_set_flow_control from wilc_setup+0xd0/0x524 [hci_wilc]
wilc_setup [hci_wilc] from hci_dev_open_sync+0x330/0x203c [bluetooth]
hci_dev_open_sync [bluetooth] from hci_dev_do_open+0x40/0xb0 [bluetooth]
hci_dev_do_open [bluetooth] from hci_power_on+0x12c/0x664 [bluetooth]
hci_power_on [bluetooth] from process_one_work+0x998/0x1a38
process_one_work from worker_thread+0x6e0/0xfb4
worker_thread from kthread+0x3d4/0x484
kthread from ret_from_fork+0x14/0x28
This warning is emitted when trying to toggle, at the highest level,
some flow control (with serdev_device_set_flow_control) in a device
driver. At the lowest level, the atmel_serial driver is using
serial_mctrl_gpio lib to enable/disable the corresponding IRQs
accordingly. The warning emitted by CONFIG_DEBUG_ATOMIC_SLEEP is due to
disable_irq (called in mctrl_gpio_disable_ms) being possibly called in
some atomic context (some tty drivers perform modem lines configuration
in regions protected by port lock).
Split mctrl_gpio_disable_ms into two differents APIs, a non-blocking one
and a blocking one. Replace mctrl_gpio_disable_ms calls with the
relevant version depending on whether the call is protected by some port
lock.
Suggested-by: Jiri Slaby <jirislaby@kernel.org>
Signed-off-by: Alexis Lothoré <alexis.lothore@bootlin.com>
Acked-by: Richard Genoud <richard.genoud@bootlin.com>
Link: https://lore.kernel.org/r/20250217-atomic_sleep_mctrl_serial_gpio-v3-1-59324b313eef@bootlin.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
Documentation/driver-api/serial/driver.rst | 2 +-
drivers/tty/serial/8250/8250_port.c | 2 +-
drivers/tty/serial/atmel_serial.c | 2 +-
drivers/tty/serial/imx.c | 2 +-
drivers/tty/serial/serial_mctrl_gpio.c | 34 +++++++++++++++++-----
drivers/tty/serial/serial_mctrl_gpio.h | 17 +++++++++--
drivers/tty/serial/sh-sci.c | 2 +-
drivers/tty/serial/stm32-usart.c | 2 +-
8 files changed, 47 insertions(+), 16 deletions(-)
diff --git a/Documentation/driver-api/serial/driver.rst b/Documentation/driver-api/serial/driver.rst
index 84b43061c11be..60434f2b02863 100644
--- a/Documentation/driver-api/serial/driver.rst
+++ b/Documentation/driver-api/serial/driver.rst
@@ -103,4 +103,4 @@ Some helpers are provided in order to set/get modem control lines via GPIO.
.. kernel-doc:: drivers/tty/serial/serial_mctrl_gpio.c
:identifiers: mctrl_gpio_init mctrl_gpio_free mctrl_gpio_to_gpiod
mctrl_gpio_set mctrl_gpio_get mctrl_gpio_enable_ms
- mctrl_gpio_disable_ms
+ mctrl_gpio_disable_ms_sync mctrl_gpio_disable_ms_no_sync
diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c
index c1376727642a7..0519679929652 100644
--- a/drivers/tty/serial/8250/8250_port.c
+++ b/drivers/tty/serial/8250/8250_port.c
@@ -1657,7 +1657,7 @@ static void serial8250_disable_ms(struct uart_port *port)
if (up->bugs & UART_BUG_NOMSR)
return;
- mctrl_gpio_disable_ms(up->gpios);
+ mctrl_gpio_disable_ms_no_sync(up->gpios);
up->ier &= ~UART_IER_MSI;
serial_port_out(port, UART_IER, up->ier);
diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c
index 09b246c9e389e..8bd39586a49f7 100644
--- a/drivers/tty/serial/atmel_serial.c
+++ b/drivers/tty/serial/atmel_serial.c
@@ -700,7 +700,7 @@ static void atmel_disable_ms(struct uart_port *port)
atmel_port->ms_irq_enabled = false;
- mctrl_gpio_disable_ms(atmel_port->gpios);
+ mctrl_gpio_disable_ms_no_sync(atmel_port->gpios);
if (!mctrl_gpio_to_gpiod(atmel_port->gpios, UART_GPIO_CTS))
idr |= ATMEL_US_CTSIC;
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index 90974d338f3c0..8e3b15534bc72 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -1596,7 +1596,7 @@ static void imx_uart_shutdown(struct uart_port *port)
imx_uart_dma_exit(sport);
}
- mctrl_gpio_disable_ms(sport->gpios);
+ mctrl_gpio_disable_ms_sync(sport->gpios);
uart_port_lock_irqsave(&sport->port, &flags);
ucr2 = imx_uart_readl(sport, UCR2);
diff --git a/drivers/tty/serial/serial_mctrl_gpio.c b/drivers/tty/serial/serial_mctrl_gpio.c
index 8855688a5b6c0..ca55bcc0b6111 100644
--- a/drivers/tty/serial/serial_mctrl_gpio.c
+++ b/drivers/tty/serial/serial_mctrl_gpio.c
@@ -322,11 +322,7 @@ void mctrl_gpio_enable_ms(struct mctrl_gpios *gpios)
}
EXPORT_SYMBOL_GPL(mctrl_gpio_enable_ms);
-/**
- * mctrl_gpio_disable_ms - disable irqs and handling of changes to the ms lines
- * @gpios: gpios to disable
- */
-void mctrl_gpio_disable_ms(struct mctrl_gpios *gpios)
+static void mctrl_gpio_disable_ms(struct mctrl_gpios *gpios, bool sync)
{
enum mctrl_gpio_idx i;
@@ -342,10 +338,34 @@ void mctrl_gpio_disable_ms(struct mctrl_gpios *gpios)
if (!gpios->irq[i])
continue;
- disable_irq(gpios->irq[i]);
+ if (sync)
+ disable_irq(gpios->irq[i]);
+ else
+ disable_irq_nosync(gpios->irq[i]);
}
}
-EXPORT_SYMBOL_GPL(mctrl_gpio_disable_ms);
+
+/**
+ * mctrl_gpio_disable_ms_sync - disable irqs and handling of changes to the ms
+ * lines, and wait for any pending IRQ to be processed
+ * @gpios: gpios to disable
+ */
+void mctrl_gpio_disable_ms_sync(struct mctrl_gpios *gpios)
+{
+ mctrl_gpio_disable_ms(gpios, true);
+}
+EXPORT_SYMBOL_GPL(mctrl_gpio_disable_ms_sync);
+
+/**
+ * mctrl_gpio_disable_ms_no_sync - disable irqs and handling of changes to the
+ * ms lines, and return immediately
+ * @gpios: gpios to disable
+ */
+void mctrl_gpio_disable_ms_no_sync(struct mctrl_gpios *gpios)
+{
+ mctrl_gpio_disable_ms(gpios, false);
+}
+EXPORT_SYMBOL_GPL(mctrl_gpio_disable_ms_no_sync);
void mctrl_gpio_enable_irq_wake(struct mctrl_gpios *gpios)
{
diff --git a/drivers/tty/serial/serial_mctrl_gpio.h b/drivers/tty/serial/serial_mctrl_gpio.h
index fc76910fb105a..79e97838ebe56 100644
--- a/drivers/tty/serial/serial_mctrl_gpio.h
+++ b/drivers/tty/serial/serial_mctrl_gpio.h
@@ -87,9 +87,16 @@ void mctrl_gpio_free(struct device *dev, struct mctrl_gpios *gpios);
void mctrl_gpio_enable_ms(struct mctrl_gpios *gpios);
/*
- * Disable gpio interrupts to report status line changes.
+ * Disable gpio interrupts to report status line changes, and block until
+ * any corresponding IRQ is processed
*/
-void mctrl_gpio_disable_ms(struct mctrl_gpios *gpios);
+void mctrl_gpio_disable_ms_sync(struct mctrl_gpios *gpios);
+
+/*
+ * Disable gpio interrupts to report status line changes, and return
+ * immediately
+ */
+void mctrl_gpio_disable_ms_no_sync(struct mctrl_gpios *gpios);
/*
* Enable gpio wakeup interrupts to enable wake up source.
@@ -148,7 +155,11 @@ static inline void mctrl_gpio_enable_ms(struct mctrl_gpios *gpios)
{
}
-static inline void mctrl_gpio_disable_ms(struct mctrl_gpios *gpios)
+static inline void mctrl_gpio_disable_ms_sync(struct mctrl_gpios *gpios)
+{
+}
+
+static inline void mctrl_gpio_disable_ms_no_sync(struct mctrl_gpios *gpios)
{
}
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
index f43059e1b5c28..80efe3b0ed0c3 100644
--- a/drivers/tty/serial/sh-sci.c
+++ b/drivers/tty/serial/sh-sci.c
@@ -2297,7 +2297,7 @@ static void sci_shutdown(struct uart_port *port)
dev_dbg(port->dev, "%s(%d)\n", __func__, port->line);
s->autorts = false;
- mctrl_gpio_disable_ms(to_sci_port(port)->gpios);
+ mctrl_gpio_disable_ms_sync(to_sci_port(port)->gpios);
uart_port_lock_irqsave(port, &flags);
sci_stop_rx(port);
diff --git a/drivers/tty/serial/stm32-usart.c b/drivers/tty/serial/stm32-usart.c
index 9b9981352b1e1..e685cace5c854 100644
--- a/drivers/tty/serial/stm32-usart.c
+++ b/drivers/tty/serial/stm32-usart.c
@@ -944,7 +944,7 @@ static void stm32_usart_enable_ms(struct uart_port *port)
static void stm32_usart_disable_ms(struct uart_port *port)
{
- mctrl_gpio_disable_ms(to_stm32_port(port)->gpios);
+ mctrl_gpio_disable_ms_sync(to_stm32_port(port)->gpios);
}
/* Transmit stop */
--
2.39.5
^ permalink raw reply related [flat|nested] 3+ messages in thread
end of thread, other threads:[~2025-05-05 22:50 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz follow: Atom feed
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[not found] <20250505223922.2682012-1-sashal@kernel.org>
2025-05-05 22:33 ` [PATCH AUTOSEL 6.12 144/486] hwmon: (dell-smm) Increment the number of fans Sasha Levin
2025-05-05 22:34 ` [PATCH AUTOSEL 6.12 223/486] x86/bugs: Make spectre user default depend on MITIGATION_SPECTRE_V2 Sasha Levin
2025-05-05 22:36 ` [PATCH AUTOSEL 6.12 306/486] serial: mctrl_gpio: split disable_ms into sync and no_sync APIs Sasha Levin
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