From 6778948f9de86c3cfaf36725a7c87dcff9ba247f Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 11 Dec 2023 08:20:59 +0000
Subject: [PATCH] kernel_5.10 no rt
---
kernel/include/linux/interrupt.h | 34 ++++++++++++++--------------------
1 files changed, 14 insertions(+), 20 deletions(-)
diff --git a/kernel/include/linux/interrupt.h b/kernel/include/linux/interrupt.h
index d21f7af..386ddf4 100644
--- a/kernel/include/linux/interrupt.h
+++ b/kernel/include/linux/interrupt.h
@@ -566,7 +566,7 @@
asmlinkage void do_softirq(void);
asmlinkage void __do_softirq(void);
-#if defined(__ARCH_HAS_DO_SOFTIRQ) && !defined(CONFIG_PREEMPT_RT)
+#ifdef __ARCH_HAS_DO_SOFTIRQ
void do_softirq_own_stack(void);
#else
static inline void do_softirq_own_stack(void)
@@ -661,21 +661,26 @@
TASKLET_STATE_RUN /* Tasklet is running (SMP only) */
};
-#if defined(CONFIG_SMP) || defined(CONFIG_PREEMPT_RT)
+#ifdef CONFIG_SMP
static inline int tasklet_trylock(struct tasklet_struct *t)
{
return !test_and_set_bit(TASKLET_STATE_RUN, &(t)->state);
}
-void tasklet_unlock(struct tasklet_struct *t);
-void tasklet_unlock_wait(struct tasklet_struct *t);
-void tasklet_unlock_spin_wait(struct tasklet_struct *t);
+static inline void tasklet_unlock(struct tasklet_struct *t)
+{
+ smp_mb__before_atomic();
+ clear_bit(TASKLET_STATE_RUN, &(t)->state);
+}
+static inline void tasklet_unlock_wait(struct tasklet_struct *t)
+{
+ while (test_bit(TASKLET_STATE_RUN, &(t)->state)) { barrier(); }
+}
#else
-static inline int tasklet_trylock(struct tasklet_struct *t) { return 1; }
-static inline void tasklet_unlock(struct tasklet_struct *t) { }
-static inline void tasklet_unlock_wait(struct tasklet_struct *t) { }
-static inline void tasklet_unlock_spin_wait(struct tasklet_struct *t) { }
+#define tasklet_trylock(t) 1
+#define tasklet_unlock_wait(t) do { } while (0)
+#define tasklet_unlock(t) do { } while (0)
#endif
extern void __tasklet_schedule(struct tasklet_struct *t);
@@ -698,17 +703,6 @@
{
atomic_inc(&t->count);
smp_mb__after_atomic();
-}
-
-/*
- * Do not use in new code. Disabling tasklets from atomic contexts is
- * error prone and should be avoided.
- */
-static inline void tasklet_disable_in_atomic(struct tasklet_struct *t)
-{
- tasklet_disable_nosync(t);
- tasklet_unlock_spin_wait(t);
- smp_mb();
}
static inline void tasklet_disable(struct tasklet_struct *t)
--
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