mk-rootfs.sh

hc

2023-12-11 072de836f53be56a70cecf70b43ae43b7ce17376

 kernel/include/linux/spinlock.h
..
..
@@ -56,7 +56,9 @@
56
56
 #include <linux/kernel.h>
57
57
 #include <linux/stringify.h>
58
58
 #include <linux/bottom_half.h>
59
+#include <linux/lockdep.h>
59
60
 #include <asm/barrier.h>
61
+#include <asm/mmiowb.h>
60
62
 
61
63
 
62
64
 /*
..
..
@@ -74,7 +76,7 @@
74
76
 #define LOCK_SECTION_END                        \
75
77
         ".previous\n\t"
76
78
 
77
-#define __lockfunc __attribute__((section(".spinlock.text")))
79
+#define __lockfunc __section(".spinlock.text")
78
80
 
79
81
 /*
80
82
  * Pull the arch_spinlock_t and arch_rwlock_t definitions:
..
..
@@ -92,12 +94,13 @@
92
94
 
93
95
 #ifdef CONFIG_DEBUG_SPINLOCK
94
96
   extern void __raw_spin_lock_init(raw_spinlock_t *lock, const char *name,
95
-				   struct lock_class_key *key);
96
-# define raw_spin_lock_init(lock)				\
97
-do {								\
98
-	static struct lock_class_key __key;			\
99
-								\
100
-	__raw_spin_lock_init((lock), #lock, &__key);		\
97
+				   struct lock_class_key *key, short inner);
98
+
99
+# define raw_spin_lock_init(lock)					\
100
+do {									\
101
+	static struct lock_class_key __key;				\
102
+									\
103
+	__raw_spin_lock_init((lock), #lock, &__key, LD_WAIT_SPIN);	\
101
104
 } while (0)
102
105
 
103
106
 #else
..
..
@@ -178,6 +181,7 @@
178
181
 {
179
182
 	__acquire(lock);
180
183
 	arch_spin_lock(&lock->raw_lock);
184
+	mmiowb_spin_lock();
181
185
 }
182
186
 
183
187
 #ifndef arch_spin_lock_flags
..
..
@@ -189,15 +193,22 @@
189
193
 {
190
194
 	__acquire(lock);
191
195
 	arch_spin_lock_flags(&lock->raw_lock, *flags);
196
+	mmiowb_spin_lock();
192
197
 }
193
198
 
194
199
 static inline int do_raw_spin_trylock(raw_spinlock_t *lock)
195
200
 {
196
-	return arch_spin_trylock(&(lock)->raw_lock);
201
+	int ret = arch_spin_trylock(&(lock)->raw_lock);
202
+
203
+	if (ret)
204
+		mmiowb_spin_lock();
205
+
206
+	return ret;
197
207
 }
198
208
 
199
209
 static inline void do_raw_spin_unlock(raw_spinlock_t *lock) __releases(lock)
200
210
 {
211
+	mmiowb_spin_unlock();
201
212
 	arch_spin_unlock(&lock->raw_lock);
202
213
 	__release(lock);
203
214
 }
..
..
@@ -205,7 +216,7 @@
205
216
 
206
217
 /*
207
218
  * Define the various spin_lock methods.  Note we define these
208
- * regardless of whether CONFIG_SMP or CONFIG_PREEMPT are set. The
219
+ * regardless of whether CONFIG_SMP or CONFIG_PREEMPTION are set. The
209
220
  * various methods are defined as nops in the case they are not
210
221
  * required.
211
222
  */
..
..
@@ -318,12 +329,26 @@
318
329
 	return &lock->rlock;
319
330
 }
320
331
 
321
-#define spin_lock_init(_lock)				\
322
-do {							\
323
-	spinlock_check(_lock);				\
324
-	raw_spin_lock_init(&(_lock)->rlock);		\
332
+#ifdef CONFIG_DEBUG_SPINLOCK
333
+
334
+# define spin_lock_init(lock)					\
335
+do {								\
336
+	static struct lock_class_key __key;			\
337
+								\
338
+	__raw_spin_lock_init(spinlock_check(lock),		\
339
+			     #lock, &__key, LD_WAIT_CONFIG);	\
325
340
 } while (0)
326
341
 
342
+#else
343
+
344
+# define spin_lock_init(_lock)			\
345
+do {						\
346
+	spinlock_check(_lock);			\
347
+	*(_lock) = __SPIN_LOCK_UNLOCKED(_lock);	\
348
+} while (0)
349
+
350
+#endif
351
+
327
352
 static __always_inline void spin_lock(spinlock_t *lock)
328
353
 {
329
354
 	raw_spin_lock(&lock->rlock);