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authorV3n3RiX <venerix@redcorelinux.org>2020-02-11 09:05:31 +0000
committerV3n3RiX <venerix@redcorelinux.org>2020-02-11 09:05:31 +0000
commitb4a23d586f3196e812f2a20cbbf040128d0c1c40 (patch)
tree76867c89820eabe5b7824184d9d77437a04215b3 /sys-kernel/linux-image-redcore-lts-legacy/files/4.19-0005-Create-highres-timeout-variants-of-schedule_timeout-.patch
parenta502f48eb0e098efd19985398b9205c34a0218ff (diff)
sys-kernel : move kernel 4.19.xx to sys-kernel/linux-{image,sources}-redcore-lts-legacy
Diffstat (limited to 'sys-kernel/linux-image-redcore-lts-legacy/files/4.19-0005-Create-highres-timeout-variants-of-schedule_timeout-.patch')
-rw-r--r--sys-kernel/linux-image-redcore-lts-legacy/files/4.19-0005-Create-highres-timeout-variants-of-schedule_timeout-.patch153
1 files changed, 153 insertions, 0 deletions
diff --git a/sys-kernel/linux-image-redcore-lts-legacy/files/4.19-0005-Create-highres-timeout-variants-of-schedule_timeout-.patch b/sys-kernel/linux-image-redcore-lts-legacy/files/4.19-0005-Create-highres-timeout-variants-of-schedule_timeout-.patch
new file mode 100644
index 00000000..500dd852
--- /dev/null
+++ b/sys-kernel/linux-image-redcore-lts-legacy/files/4.19-0005-Create-highres-timeout-variants-of-schedule_timeout-.patch
@@ -0,0 +1,153 @@
+From 552f25751a108c7e185b82aa3110d43bfe1e59b1 Mon Sep 17 00:00:00 2001
+From: Con Kolivas <kernel@kolivas.org>
+Date: Sat, 12 Aug 2017 11:53:39 +1000
+Subject: [PATCH 05/16] Create highres timeout variants of schedule_timeout
+ functions.
+
+---
+ include/linux/freezer.h | 1 +
+ include/linux/sched.h | 31 ++++++++++++++++--
+ kernel/time/hrtimer.c | 71 +++++++++++++++++++++++++++++++++++++++++
+ 3 files changed, 101 insertions(+), 2 deletions(-)
+
+diff --git a/include/linux/freezer.h b/include/linux/freezer.h
+index 21f5aa0b217f..ee9b46394fdf 100644
+--- a/include/linux/freezer.h
++++ b/include/linux/freezer.h
+@@ -297,6 +297,7 @@ static inline void set_freezable(void) {}
+ #define wait_event_freezekillable_unsafe(wq, condition) \
+ wait_event_killable(wq, condition)
+
++#define pm_freezing (false)
+ #endif /* !CONFIG_FREEZER */
+
+ #endif /* FREEZER_H_INCLUDED */
+diff --git a/include/linux/sched.h b/include/linux/sched.h
+index 1f8cea1436b4..1cd022304c64 100644
+--- a/include/linux/sched.h
++++ b/include/linux/sched.h
+@@ -211,13 +211,40 @@ struct task_group;
+
+ extern void scheduler_tick(void);
+
+-#define MAX_SCHEDULE_TIMEOUT LONG_MAX
+-
++#define MAX_SCHEDULE_TIMEOUT LONG_MAX
+ extern long schedule_timeout(long timeout);
+ extern long schedule_timeout_interruptible(long timeout);
+ extern long schedule_timeout_killable(long timeout);
+ extern long schedule_timeout_uninterruptible(long timeout);
+ extern long schedule_timeout_idle(long timeout);
++
++#ifdef CONFIG_HIGH_RES_TIMERS
++extern long schedule_msec_hrtimeout(long timeout);
++extern long schedule_min_hrtimeout(void);
++extern long schedule_msec_hrtimeout_interruptible(long timeout);
++extern long schedule_msec_hrtimeout_uninterruptible(long timeout);
++#else
++static inline long schedule_msec_hrtimeout(long timeout)
++{
++ return schedule_timeout(msecs_to_jiffies(timeout));
++}
++
++static inline long schedule_min_hrtimeout(void)
++{
++ return schedule_timeout(1);
++}
++
++static inline long schedule_msec_hrtimeout_interruptible(long timeout)
++{
++ return schedule_timeout_interruptible(msecs_to_jiffies(timeout));
++}
++
++static inline long schedule_msec_hrtimeout_uninterruptible(long timeout)
++{
++ return schedule_timeout_uninterruptible(msecs_to_jiffies(timeout));
++}
++#endif
++
+ asmlinkage void schedule(void);
+ extern void schedule_preempt_disabled(void);
+
+diff --git a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c
+index e1a549c9e399..12735724cce4 100644
+--- a/kernel/time/hrtimer.c
++++ b/kernel/time/hrtimer.c
+@@ -2026,3 +2026,74 @@ int __sched schedule_hrtimeout(ktime_t *expires,
+ return schedule_hrtimeout_range(expires, 0, mode);
+ }
+ EXPORT_SYMBOL_GPL(schedule_hrtimeout);
++
++/*
++ * As per schedule_hrtimeout but taskes a millisecond value and returns how
++ * many milliseconds are left.
++ */
++long __sched schedule_msec_hrtimeout(long timeout)
++{
++ struct hrtimer_sleeper t;
++ int delta, secs, jiffs;
++ ktime_t expires;
++
++ if (!timeout) {
++ __set_current_state(TASK_RUNNING);
++ return 0;
++ }
++
++ jiffs = msecs_to_jiffies(timeout);
++ /*
++ * If regular timer resolution is adequate or hrtimer resolution is not
++ * (yet) better than Hz, as would occur during startup, use regular
++ * timers.
++ */
++ if (jiffs > 4 || hrtimer_resolution >= NSEC_PER_SEC / HZ)
++ return schedule_timeout(jiffs);
++
++ secs = timeout / 1000;
++ delta = (timeout % 1000) * NSEC_PER_MSEC;
++ expires = ktime_set(secs, delta);
++
++ hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
++ hrtimer_set_expires_range_ns(&t.timer, expires, delta);
++
++ hrtimer_init_sleeper(&t, current);
++
++ hrtimer_start_expires(&t.timer, HRTIMER_MODE_REL);
++
++ if (likely(t.task))
++ schedule();
++
++ hrtimer_cancel(&t.timer);
++ destroy_hrtimer_on_stack(&t.timer);
++
++ __set_current_state(TASK_RUNNING);
++
++ expires = hrtimer_expires_remaining(&t.timer);
++ timeout = ktime_to_ms(expires);
++ return timeout < 0 ? 0 : timeout;
++}
++
++EXPORT_SYMBOL(schedule_msec_hrtimeout);
++
++long __sched schedule_min_hrtimeout(void)
++{
++ return schedule_msec_hrtimeout(1);
++}
++
++EXPORT_SYMBOL(schedule_min_hrtimeout);
++
++long __sched schedule_msec_hrtimeout_interruptible(long timeout)
++{
++ __set_current_state(TASK_INTERRUPTIBLE);
++ return schedule_msec_hrtimeout(timeout);
++}
++EXPORT_SYMBOL(schedule_msec_hrtimeout_interruptible);
++
++long __sched schedule_msec_hrtimeout_uninterruptible(long timeout)
++{
++ __set_current_state(TASK_UNINTERRUPTIBLE);
++ return schedule_msec_hrtimeout(timeout);
++}
++EXPORT_SYMBOL(schedule_msec_hrtimeout_uninterruptible);
+--
+2.17.1
+