From 10ebd8556b7990499c896a550e3d416b444211e6 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 10 May 2024 02:23:07 +0000
Subject: [PATCH] add led
---
kernel/include/linux/spinlock.h | 63 +++++++++++++++++++------------
1 files changed, 39 insertions(+), 24 deletions(-)
diff --git a/kernel/include/linux/spinlock.h b/kernel/include/linux/spinlock.h
index 5f5ad06..7989784 100644
--- a/kernel/include/linux/spinlock.h
+++ b/kernel/include/linux/spinlock.h
@@ -56,7 +56,9 @@
#include <linux/kernel.h>
#include <linux/stringify.h>
#include <linux/bottom_half.h>
+#include <linux/lockdep.h>
#include <asm/barrier.h>
+#include <asm/mmiowb.h>
/*
@@ -74,7 +76,7 @@
#define LOCK_SECTION_END \
".previous\n\t"
-#define __lockfunc __attribute__((section(".spinlock.text")))
+#define __lockfunc __section(".spinlock.text")
/*
* Pull the arch_spinlock_t and arch_rwlock_t definitions:
@@ -92,12 +94,13 @@
#ifdef CONFIG_DEBUG_SPINLOCK
extern void __raw_spin_lock_init(raw_spinlock_t *lock, const char *name,
- struct lock_class_key *key);
-# define raw_spin_lock_init(lock) \
-do { \
- static struct lock_class_key __key; \
- \
- __raw_spin_lock_init((lock), #lock, &__key); \
+ struct lock_class_key *key, short inner);
+
+# define raw_spin_lock_init(lock) \
+do { \
+ static struct lock_class_key __key; \
+ \
+ __raw_spin_lock_init((lock), #lock, &__key, LD_WAIT_SPIN); \
} while (0)
#else
@@ -178,6 +181,7 @@
{
__acquire(lock);
arch_spin_lock(&lock->raw_lock);
+ mmiowb_spin_lock();
}
#ifndef arch_spin_lock_flags
@@ -189,15 +193,22 @@
{
__acquire(lock);
arch_spin_lock_flags(&lock->raw_lock, *flags);
+ mmiowb_spin_lock();
}
static inline int do_raw_spin_trylock(raw_spinlock_t *lock)
{
- return arch_spin_trylock(&(lock)->raw_lock);
+ int ret = arch_spin_trylock(&(lock)->raw_lock);
+
+ if (ret)
+ mmiowb_spin_lock();
+
+ return ret;
}
static inline void do_raw_spin_unlock(raw_spinlock_t *lock) __releases(lock)
{
+ mmiowb_spin_unlock();
arch_spin_unlock(&lock->raw_lock);
__release(lock);
}
@@ -205,7 +216,7 @@
/*
* Define the various spin_lock methods. Note we define these
- * regardless of whether CONFIG_SMP or CONFIG_PREEMPT are set. The
+ * regardless of whether CONFIG_SMP or CONFIG_PREEMPTION are set. The
* various methods are defined as nops in the case they are not
* required.
*/
@@ -298,11 +309,7 @@
})
/* Include rwlock functions */
-#ifdef CONFIG_PREEMPT_RT_FULL
-# include <linux/rwlock_rt.h>
-#else
-# include <linux/rwlock.h>
-#endif
+#include <linux/rwlock.h>
/*
* Pull the _spin_*()/_read_*()/_write_*() functions/declarations:
@@ -313,10 +320,6 @@
# include <linux/spinlock_api_up.h>
#endif
-#ifdef CONFIG_PREEMPT_RT_FULL
-# include <linux/spinlock_rt.h>
-#else /* PREEMPT_RT_FULL */
-
/*
* Map the spin_lock functions to the raw variants for PREEMPT_RT=n
*/
@@ -326,11 +329,25 @@
return &lock->rlock;
}
-#define spin_lock_init(_lock) \
-do { \
- spinlock_check(_lock); \
- raw_spin_lock_init(&(_lock)->rlock); \
+#ifdef CONFIG_DEBUG_SPINLOCK
+
+# define spin_lock_init(lock) \
+do { \
+ static struct lock_class_key __key; \
+ \
+ __raw_spin_lock_init(spinlock_check(lock), \
+ #lock, &__key, LD_WAIT_CONFIG); \
} while (0)
+
+#else
+
+# define spin_lock_init(_lock) \
+do { \
+ spinlock_check(_lock); \
+ *(_lock) = __SPIN_LOCK_UNLOCKED(_lock); \
+} while (0)
+
+#endif
static __always_inline void spin_lock(spinlock_t *lock)
{
@@ -436,8 +453,6 @@
}
#define assert_spin_locked(lock) assert_raw_spin_locked(&(lock)->rlock)
-
-#endif /* !PREEMPT_RT_FULL */
/*
* Pull the atomic_t declaration:
--
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