The patch titled
freezer: introduce freezer-friendly waiting macros
has been removed from the -mm tree. Its filename was
freezer-introduce-freezer-firendly-waiting-macros.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
Subject: freezer: introduce freezer-friendly waiting macros
From: Rafael J. Wysocki <rjw@xxxxxxx>
Introduce freezer-friendly wrappers around wait_event_interruptible() and
wait_event_interruptible_timeout(), originally defined in <linux/wait.h>, to
be used in freezable kernel threads. Make some of the freezable kernel
threads use them.
This is necessary for the freezer to stop sending signals to kernel threads,
which is implemented in the next patch.
Signed-off-by: Rafael J. Wysocki <rjw@xxxxxxx>
Acked-by: Pavel Machek <pavel@xxxxxx>
Cc: Nigel Cunningham <nigel@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/input/gameport/gameport.c | 3 -
drivers/input/serio/serio.c | 3 -
drivers/input/touchscreen/ucb1400_ts.c | 3 -
drivers/media/dvb/dvb-core/dvb_frontend.c | 3 +
drivers/usb/core/hub.c | 3 -
drivers/usb/storage/usb.c | 5 --
include/linux/freezer.h | 38 ++++++++++++++++++++
7 files changed, 45 insertions(+), 13 deletions(-)
diff -puN drivers/input/gameport/gameport.c~freezer-introduce-freezer-firendly-waiting-macros drivers/input/gameport/gameport.c
--- a/drivers/input/gameport/gameport.c~freezer-introduce-freezer-firendly-waiting-macros
+++ a/drivers/input/gameport/gameport.c
@@ -448,9 +448,8 @@ static int gameport_thread(void *nothing
set_freezable();
do {
gameport_handle_event();
- wait_event_interruptible(gameport_wait,
+ wait_event_freezable(gameport_wait,
kthread_should_stop() || !list_empty(&gameport_event_list));
- try_to_freeze();
} while (!kthread_should_stop());
printk(KERN_DEBUG "gameport: kgameportd exiting\n");
diff -puN drivers/input/serio/serio.c~freezer-introduce-freezer-firendly-waiting-macros drivers/input/serio/serio.c
--- a/drivers/input/serio/serio.c~freezer-introduce-freezer-firendly-waiting-macros
+++ a/drivers/input/serio/serio.c
@@ -387,9 +387,8 @@ static int serio_thread(void *nothing)
set_freezable();
do {
serio_handle_event();
- wait_event_interruptible(serio_wait,
+ wait_event_freezable(serio_wait,
kthread_should_stop() || !list_empty(&serio_event_list));
- try_to_freeze();
} while (!kthread_should_stop());
printk(KERN_DEBUG "serio: kseriod exiting\n");
diff -puN drivers/input/touchscreen/ucb1400_ts.c~freezer-introduce-freezer-firendly-waiting-macros drivers/input/touchscreen/ucb1400_ts.c
--- a/drivers/input/touchscreen/ucb1400_ts.c~freezer-introduce-freezer-firendly-waiting-macros
+++ a/drivers/input/touchscreen/ucb1400_ts.c
@@ -333,10 +333,9 @@ static int ucb1400_ts_thread(void *_ucb)
timeout = msecs_to_jiffies(10);
}
- wait_event_interruptible_timeout(ucb->ts_wait,
+ wait_event_freezable_timeout(ucb->ts_wait,
ucb->irq_pending || ucb->ts_restart || kthread_should_stop(),
timeout);
- try_to_freeze();
}
/* Send the "pen off" if we are stopping with the pen still active */
diff -puN drivers/media/dvb/dvb-core/dvb_frontend.c~freezer-introduce-freezer-firendly-waiting-macros drivers/media/dvb/dvb-core/dvb_frontend.c
--- a/drivers/media/dvb/dvb-core/dvb_frontend.c~freezer-introduce-freezer-firendly-waiting-macros
+++ a/drivers/media/dvb/dvb-core/dvb_frontend.c
@@ -527,7 +527,8 @@ static int dvb_frontend_thread(void *dat
up(&fepriv->sem); /* is locked when we enter the thread... */
restart:
timeout = wait_event_interruptible_timeout(fepriv->wait_queue,
- dvb_frontend_should_wakeup(fe) || kthread_should_stop(),
+ dvb_frontend_should_wakeup(fe) || kthread_should_stop()
+ || freezing(current),
fepriv->delay);
if (kthread_should_stop() || dvb_frontend_is_exiting(fe)) {
diff -puN drivers/usb/core/hub.c~freezer-introduce-freezer-firendly-waiting-macros drivers/usb/core/hub.c
--- a/drivers/usb/core/hub.c~freezer-introduce-freezer-firendly-waiting-macros
+++ a/drivers/usb/core/hub.c
@@ -2870,10 +2870,9 @@ static int hub_thread(void *__unused)
set_freezable();
do {
hub_events();
- wait_event_interruptible(khubd_wait,
+ wait_event_freezable(khubd_wait,
!list_empty(&hub_event_list) ||
kthread_should_stop());
- try_to_freeze();
} while (!kthread_should_stop() || !list_empty(&hub_event_list));
pr_debug("%s: khubd exiting\n", usbcore_name);
diff -puN drivers/usb/storage/usb.c~freezer-introduce-freezer-firendly-waiting-macros drivers/usb/storage/usb.c
--- a/drivers/usb/storage/usb.c~freezer-introduce-freezer-firendly-waiting-macros
+++ a/drivers/usb/storage/usb.c
@@ -907,12 +907,9 @@ static int usb_stor_scan_thread(void * _
if (delay_use > 0) {
printk(KERN_DEBUG "usb-storage: waiting for device "
"to settle before scanning\n");
-retry:
- wait_event_interruptible_timeout(us->delay_wait,
+ wait_event_freezable_timeout(us->delay_wait,
test_bit(US_FLIDX_DISCONNECTING, &us->flags),
delay_use * HZ);
- if (try_to_freeze())
- goto retry;
}
/* If the device is still connected, perform the scanning */
diff -puN include/linux/freezer.h~freezer-introduce-freezer-firendly-waiting-macros include/linux/freezer.h
--- a/include/linux/freezer.h~freezer-introduce-freezer-firendly-waiting-macros
+++ a/include/linux/freezer.h
@@ -4,6 +4,7 @@
#define FREEZER_H_INCLUDED
#include <linux/sched.h>
+#include <linux/wait.h>
#ifdef CONFIG_PM_SLEEP
/*
@@ -126,6 +127,36 @@ static inline void set_freezable(void)
current->flags &= ~PF_NOFREEZE;
}
+/*
+ * Freezer-friendly wrappers around wait_event_interruptible() and
+ * wait_event_interruptible_timeout(), originally defined in <linux/wait.h>
+ */
+
+#define wait_event_freezable(wq, condition) \
+({ \
+ int __retval; \
+ do { \
+ __retval = wait_event_interruptible(wq, \
+ (condition) || freezing(current)); \
+ if (__retval && !freezing(current)) \
+ break; \
+ else if (!(condition)) \
+ __retval = -ERESTARTSYS; \
+ } while (try_to_freeze()); \
+ __retval; \
+})
+
+
+#define wait_event_freezable_timeout(wq, condition, timeout) \
+({ \
+ long __retval = timeout; \
+ do { \
+ __retval = wait_event_interruptible_timeout(wq, \
+ (condition) || freezing(current), \
+ __retval); \
+ } while (try_to_freeze()); \
+ __retval; \
+})
#else /* !CONFIG_PM_SLEEP */
static inline int frozen(struct task_struct *p) { return 0; }
static inline int freezing(struct task_struct *p) { return 0; }
@@ -143,6 +174,13 @@ static inline void freezer_do_not_count(
static inline void freezer_count(void) {}
static inline int freezer_should_skip(struct task_struct *p) { return 0; }
static inline void set_freezable(void) {}
+
+#define wait_event_freezable(wq, condition) \
+ wait_event_interruptible(wq, condition)
+
+#define wait_event_freezable_timeout(wq, condition, timeout) \
+ wait_event_interruptible_timeout(wq, condition, timeout)
+
#endif /* !CONFIG_PM_SLEEP */
#endif /* FREEZER_H_INCLUDED */
_
Patches currently in -mm which might be from rjw@xxxxxxx are
origin.patch
git-acpi.patch
revert-x86_64-mm-cpa-einval.patch
shrink_slab-handle-bad-shrinkers.patch
-
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