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-rw-r--r--kernel/power/Kconfig10
-rw-r--r--kernel/power/hibernate.c33
-rw-r--r--kernel/power/main.c18
-rw-r--r--kernel/power/poweroff.c3
-rw-r--r--kernel/power/qos.c1
-rw-r--r--kernel/power/snapshot.c9
-rw-r--r--kernel/power/suspend.c29
-rw-r--r--kernel/power/suspend_test.c3
-rw-r--r--kernel/power/swap.c4
-rw-r--r--kernel/power/user.c9
10 files changed, 71 insertions, 48 deletions
diff --git a/kernel/power/Kconfig b/kernel/power/Kconfig
index f8fe57d1022e..ff8592ddedee 100644
--- a/kernel/power/Kconfig
+++ b/kernel/power/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
config SUSPEND
bool "Suspend to RAM and standby"
depends on ARCH_SUSPEND_POSSIBLE
@@ -114,6 +115,15 @@ config PM_SLEEP_SMP
depends on PM_SLEEP
select HOTPLUG_CPU
+config PM_SLEEP_SMP_NONZERO_CPU
+ def_bool y
+ depends on PM_SLEEP_SMP
+ depends on ARCH_SUSPEND_NONZERO_CPU
+ ---help---
+ If an arch can suspend (for suspend, hibernate, kexec, etc) on a
+ non-zero numbered CPU, it may define ARCH_SUSPEND_NONZERO_CPU. This
+ will allow nohz_full mask to include CPU0.
+
config PM_AUTOSLEEP
bool "Opportunistic sleep"
depends on PM_SLEEP
diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c
index abef759de7c8..cd7434e6000d 100644
--- a/kernel/power/hibernate.c
+++ b/kernel/power/hibernate.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* kernel/power/hibernate.c - Hibernation (a.k.a suspend-to-disk) support.
*
@@ -6,15 +7,12 @@
* Copyright (c) 2004 Pavel Machek <pavel@ucw.cz>
* Copyright (c) 2009 Rafael J. Wysocki, Novell Inc.
* Copyright (C) 2012 Bojan Smojver <bojan@rexursive.com>
- *
- * This file is released under the GPLv2.
*/
#define pr_fmt(fmt) "PM: " fmt
#include <linux/export.h>
#include <linux/suspend.h>
-#include <linux/syscalls.h>
#include <linux/reboot.h>
#include <linux/string.h>
#include <linux/device.h>
@@ -130,7 +128,7 @@ static int hibernation_test(int level) { return 0; }
static int platform_begin(int platform_mode)
{
return (platform_mode && hibernation_ops) ?
- hibernation_ops->begin() : 0;
+ hibernation_ops->begin(PMSG_FREEZE) : 0;
}
/**
@@ -258,6 +256,11 @@ void swsusp_show_speed(ktime_t start, ktime_t stop,
(kps % 1000) / 10);
}
+__weak int arch_resume_nosmt(void)
+{
+ return 0;
+}
+
/**
* create_image - Create a hibernation image.
* @platform_mode: Whether or not to use the platform driver.
@@ -281,7 +284,7 @@ static int create_image(int platform_mode)
if (error || hibernation_test(TEST_PLATFORM))
goto Platform_finish;
- error = disable_nonboot_cpus();
+ error = suspend_disable_secondary_cpus();
if (error || hibernation_test(TEST_CPUS))
goto Enable_cpus;
@@ -323,7 +326,11 @@ static int create_image(int platform_mode)
local_irq_enable();
Enable_cpus:
- enable_nonboot_cpus();
+ suspend_enable_secondary_cpus();
+
+ /* Allow architectures to do nosmt-specific post-resume dances */
+ if (!in_suspend)
+ error = arch_resume_nosmt();
Platform_finish:
platform_finish(platform_mode);
@@ -417,7 +424,7 @@ int hibernation_snapshot(int platform_mode)
int __weak hibernate_resume_nonboot_cpu_disable(void)
{
- return disable_nonboot_cpus();
+ return suspend_disable_secondary_cpus();
}
/**
@@ -486,7 +493,7 @@ static int resume_target_kernel(bool platform_mode)
local_irq_enable();
Enable_cpus:
- enable_nonboot_cpus();
+ suspend_enable_secondary_cpus();
Cleanup:
platform_restore_cleanup(platform_mode);
@@ -543,7 +550,7 @@ int hibernation_platform_enter(void)
* hibernation_ops->finish() before saving the image, so we should let
* the firmware know that we're going to enter the sleep state after all
*/
- error = hibernation_ops->begin();
+ error = hibernation_ops->begin(PMSG_HIBERNATE);
if (error)
goto Close;
@@ -564,7 +571,7 @@ int hibernation_platform_enter(void)
if (error)
goto Platform_finish;
- error = disable_nonboot_cpus();
+ error = suspend_disable_secondary_cpus();
if (error)
goto Enable_cpus;
@@ -586,7 +593,7 @@ int hibernation_platform_enter(void)
local_irq_enable();
Enable_cpus:
- enable_nonboot_cpus();
+ suspend_enable_secondary_cpus();
Platform_finish:
hibernation_ops->finish();
@@ -709,9 +716,7 @@ int hibernate(void)
goto Exit;
}
- pr_info("Syncing filesystems ... \n");
- ksys_sync();
- pr_info("done.\n");
+ ksys_sync_helper();
error = freeze_processes();
if (error)
diff --git a/kernel/power/main.c b/kernel/power/main.c
index 98e76cad128b..bdbd605c4215 100644
--- a/kernel/power/main.c
+++ b/kernel/power/main.c
@@ -1,11 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* kernel/power/main.c - PM subsystem core functionality.
*
* Copyright (c) 2003 Patrick Mochel
* Copyright (c) 2003 Open Source Development Lab
- *
- * This file is released under the GPLv2
- *
*/
#include <linux/export.h>
@@ -16,6 +14,7 @@
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/suspend.h>
+#include <linux/syscalls.h>
#include "power.h"
@@ -51,6 +50,19 @@ void unlock_system_sleep(void)
}
EXPORT_SYMBOL_GPL(unlock_system_sleep);
+void ksys_sync_helper(void)
+{
+ ktime_t start;
+ long elapsed_msecs;
+
+ start = ktime_get();
+ ksys_sync();
+ elapsed_msecs = ktime_to_ms(ktime_sub(ktime_get(), start));
+ pr_info("Filesystems sync: %ld.%03ld seconds\n",
+ elapsed_msecs / MSEC_PER_SEC, elapsed_msecs % MSEC_PER_SEC);
+}
+EXPORT_SYMBOL_GPL(ksys_sync_helper);
+
/* Routines for PM-transition notifications */
static BLOCKING_NOTIFIER_HEAD(pm_chain_head);
diff --git a/kernel/power/poweroff.c b/kernel/power/poweroff.c
index 7ef6866b521d..6d475281c730 100644
--- a/kernel/power/poweroff.c
+++ b/kernel/power/poweroff.c
@@ -1,7 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* poweroff.c - sysrq handler to gracefully power down machine.
- *
- * This file is released under the GPL v2
*/
#include <linux/kernel.h>
diff --git a/kernel/power/qos.c b/kernel/power/qos.c
index 9d22131afc1e..33e3febaba53 100644
--- a/kernel/power/qos.c
+++ b/kernel/power/qos.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* This module exposes the interface to kernel space for specifying
* QoS dependencies. It provides infrastructure for registration of:
diff --git a/kernel/power/snapshot.c b/kernel/power/snapshot.c
index f08a1e4ee1d4..83105874f255 100644
--- a/kernel/power/snapshot.c
+++ b/kernel/power/snapshot.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* linux/kernel/power/snapshot.c
*
@@ -5,9 +6,6 @@
*
* Copyright (C) 1998-2005 Pavel Machek <pavel@ucw.cz>
* Copyright (C) 2006 Rafael J. Wysocki <rjw@sisk.pl>
- *
- * This file is released under the GPLv2.
- *
*/
#define pr_fmt(fmt) "PM: " fmt
@@ -1342,8 +1340,9 @@ static inline void do_copy_page(long *dst, long *src)
* safe_copy_page - Copy a page in a safe way.
*
* Check if the page we are going to copy is marked as present in the kernel
- * page tables (this always is the case if CONFIG_DEBUG_PAGEALLOC is not set
- * and in that case kernel_page_present() always returns 'true').
+ * page tables. This always is the case if CONFIG_DEBUG_PAGEALLOC or
+ * CONFIG_ARCH_HAS_SET_DIRECT_MAP is not set. In that case kernel_page_present()
+ * always returns 'true'.
*/
static void safe_copy_page(void *dst, struct page *s_page)
{
diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c
index 0bd595a0b610..096211299c07 100644
--- a/kernel/power/suspend.c
+++ b/kernel/power/suspend.c
@@ -1,11 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* kernel/power/suspend.c - Suspend to RAM and standby functionality.
*
* Copyright (c) 2003 Patrick Mochel
* Copyright (c) 2003 Open Source Development Lab
* Copyright (c) 2009 Rafael J. Wysocki <rjw@sisk.pl>, Novell Inc.
- *
- * This file is released under the GPLv2.
*/
#define pr_fmt(fmt) "PM: " fmt
@@ -17,7 +16,6 @@
#include <linux/console.h>
#include <linux/cpu.h>
#include <linux/cpuidle.h>
-#include <linux/syscalls.h>
#include <linux/gfp.h>
#include <linux/io.h>
#include <linux/kernel.h>
@@ -63,6 +61,12 @@ static DECLARE_SWAIT_QUEUE_HEAD(s2idle_wait_head);
enum s2idle_states __read_mostly s2idle_state;
static DEFINE_RAW_SPINLOCK(s2idle_lock);
+/**
+ * pm_suspend_via_s2idle - Check if suspend-to-idle is the default suspend.
+ *
+ * Return 'true' if suspend-to-idle has been selected as the default system
+ * suspend method.
+ */
bool pm_suspend_via_s2idle(void)
{
return mem_sleep_current == PM_SUSPEND_TO_IDLE;
@@ -428,7 +432,7 @@ static int suspend_enter(suspend_state_t state, bool *wakeup)
if (suspend_test(TEST_PLATFORM))
goto Platform_wake;
- error = disable_nonboot_cpus();
+ error = suspend_disable_secondary_cpus();
if (error || suspend_test(TEST_CPUS))
goto Enable_cpus;
@@ -458,7 +462,7 @@ static int suspend_enter(suspend_state_t state, bool *wakeup)
BUG_ON(irqs_disabled());
Enable_cpus:
- enable_nonboot_cpus();
+ suspend_enable_secondary_cpus();
Platform_wake:
platform_resume_noirq(state);
@@ -489,6 +493,9 @@ int suspend_devices_and_enter(suspend_state_t state)
pm_suspend_target_state = state;
+ if (state == PM_SUSPEND_TO_IDLE)
+ pm_set_suspend_no_platform();
+
error = platform_suspend_begin(state);
if (error)
goto Close;
@@ -568,13 +575,11 @@ static int enter_state(suspend_state_t state)
if (state == PM_SUSPEND_TO_IDLE)
s2idle_begin();
-#ifndef CONFIG_SUSPEND_SKIP_SYNC
- trace_suspend_resume(TPS("sync_filesystems"), 0, true);
- pr_info("Syncing filesystems ... ");
- ksys_sync();
- pr_cont("done.\n");
- trace_suspend_resume(TPS("sync_filesystems"), 0, false);
-#endif
+ if (!IS_ENABLED(CONFIG_SUSPEND_SKIP_SYNC)) {
+ trace_suspend_resume(TPS("sync_filesystems"), 0, true);
+ ksys_sync_helper();
+ trace_suspend_resume(TPS("sync_filesystems"), 0, false);
+ }
pm_pr_dbg("Preparing system for sleep (%s)\n", mem_sleep_labels[state]);
pm_suspend_clear_flags();
diff --git a/kernel/power/suspend_test.c b/kernel/power/suspend_test.c
index 6a897e8b2a88..60564b58de07 100644
--- a/kernel/power/suspend_test.c
+++ b/kernel/power/suspend_test.c
@@ -1,9 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* kernel/power/suspend_test.c - Suspend to RAM and standby test facility.
*
* Copyright (c) 2009 Pavel Machek <pavel@ucw.cz>
- *
- * This file is released under the GPLv2.
*/
#include <linux/init.h>
diff --git a/kernel/power/swap.c b/kernel/power/swap.c
index d7f6c1a288d3..e1912ad13bdc 100644
--- a/kernel/power/swap.c
+++ b/kernel/power/swap.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* linux/kernel/power/swap.c
*
@@ -7,9 +8,6 @@
* Copyright (C) 1998,2001-2005 Pavel Machek <pavel@ucw.cz>
* Copyright (C) 2006 Rafael J. Wysocki <rjw@sisk.pl>
* Copyright (C) 2010-2012 Bojan Smojver <bojan@rexursive.com>
- *
- * This file is released under the GPLv2.
- *
*/
#define pr_fmt(fmt) "PM: " fmt
diff --git a/kernel/power/user.c b/kernel/power/user.c
index 2d8b60a3c86b..77438954cc2b 100644
--- a/kernel/power/user.c
+++ b/kernel/power/user.c
@@ -1,16 +1,13 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* linux/kernel/power/user.c
*
* This file provides the user space interface for software suspend/resume.
*
* Copyright (C) 2006 Rafael J. Wysocki <rjw@sisk.pl>
- *
- * This file is released under the GPLv2.
- *
*/
#include <linux/suspend.h>
-#include <linux/syscalls.h>
#include <linux/reboot.h>
#include <linux/string.h>
#include <linux/device.h>
@@ -228,9 +225,7 @@ static long snapshot_ioctl(struct file *filp, unsigned int cmd,
if (data->frozen)
break;
- printk("Syncing filesystems ... ");
- ksys_sync();
- printk("done.\n");
+ ksys_sync_helper();
error = freeze_processes();
if (error)
generated by cgit v1.2.3 (git 2.39.1) at 2026-01-09 23:38:56 +0000