From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file
---
kernel/include/linux/mutex.h | 61 +++++++++++++-----------------
1 files changed, 26 insertions(+), 35 deletions(-)
diff --git a/kernel/include/linux/mutex.h b/kernel/include/linux/mutex.h
index 6aa217c..05165a6 100644
--- a/kernel/include/linux/mutex.h
+++ b/kernel/include/linux/mutex.h
@@ -19,19 +19,9 @@
#include <asm/processor.h>
#include <linux/osq_lock.h>
#include <linux/debug_locks.h>
+#include <linux/android_vendor.h>
struct ww_acquire_ctx;
-
-#ifdef CONFIG_DEBUG_LOCK_ALLOC
-# define __DEP_MAP_MUTEX_INITIALIZER(lockname) \
- , .dep_map = { .name = #lockname }
-#else
-# define __DEP_MAP_MUTEX_INITIALIZER(lockname)
-#endif
-
-#ifdef CONFIG_PREEMPT_RT_FULL
-# include <linux/mutex_rt.h>
-#else
/*
* Simple, straightforward mutexes with strict semantics:
@@ -74,17 +64,19 @@
#ifdef CONFIG_DEBUG_LOCK_ALLOC
struct lockdep_map dep_map;
#endif
+ ANDROID_OEM_DATA_ARRAY(1, 2);
};
-/*
- * Internal helper function; C doesn't allow us to hide it :/
- *
- * DO NOT USE (outside of mutex code).
- */
-static inline struct task_struct *__mutex_owner(struct mutex *lock)
-{
- return (struct task_struct *)(atomic_long_read(&lock->owner) & ~0x07);
-}
+struct ww_class;
+struct ww_acquire_ctx;
+
+struct ww_mutex {
+ struct mutex base;
+ struct ww_acquire_ctx *ctx;
+#ifdef CONFIG_DEBUG_MUTEXES
+ struct ww_class *ww_class;
+#endif
+};
/*
* This is the control structure for tasks blocked on mutex,
@@ -129,6 +121,16 @@
__mutex_init((mutex), #mutex, &__key); \
} while (0)
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+# define __DEP_MAP_MUTEX_INITIALIZER(lockname) \
+ , .dep_map = { \
+ .name = #lockname, \
+ .wait_type_inner = LD_WAIT_SLEEP, \
+ }
+#else
+# define __DEP_MAP_MUTEX_INITIALIZER(lockname)
+#endif
+
#define __MUTEX_INITIALIZER(lockname) \
{ .owner = ATOMIC_LONG_INIT(0) \
, .wait_lock = __SPIN_LOCK_UNLOCKED(lockname.wait_lock) \
@@ -148,14 +150,11 @@
*
* Returns true if the mutex is locked, false if unlocked.
*/
-static inline bool mutex_is_locked(struct mutex *lock)
-{
- return __mutex_owner(lock) != NULL;
-}
+extern bool mutex_is_locked(struct mutex *lock);
/*
* See kernel/locking/mutex.c for detailed documentation of these APIs.
- * Also see Documentation/locking/mutex-design.txt.
+ * Also see Documentation/locking/mutex-design.rst.
*/
#ifdef CONFIG_DEBUG_LOCK_ALLOC
extern void mutex_lock_nested(struct mutex *lock, unsigned int subclass);
@@ -224,15 +223,7 @@
* - MUTEX_TRYLOCK_SUCCESS - lock acquired,
* - MUTEX_TRYLOCK_RECURSIVE - we already owned the lock.
*/
-static inline /* __deprecated */ __must_check enum mutex_trylock_recursive_enum
-mutex_trylock_recursive(struct mutex *lock)
-{
- if (unlikely(__mutex_owner(lock) == current))
- return MUTEX_TRYLOCK_RECURSIVE;
-
- return mutex_trylock(lock);
-}
-
-#endif /* !PREEMPT_RT_FULL */
+extern /* __deprecated */ __must_check enum mutex_trylock_recursive_enum
+mutex_trylock_recursive(struct mutex *lock);
#endif /* __LINUX_MUTEX_H */
--
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