--- zzzz-none-000/linux-4.4.271/arch/arm/include/asm/spinlock.h	2021-06-03 06:22:09.000000000 +0000
+++ hawkeye-5590-750/linux-4.4.271/arch/arm/include/asm/spinlock.h	2023-04-19 10:22:27.000000000 +0000
@@ -5,6 +5,41 @@
 #error SMP not supported on pre-ARMv6 CPUs
 #endif
 
+/*--------------------------------------------------------------------------------*\
+\*--------------------------------------------------------------------------------*/
+#if defined(CONFIG_ENABLE_SPINLOCK_PROFILING_HOOKS)
+extern int avm_simple_profiling_is_enabled_func(void);
+extern unsigned int avm_get_cycles_func(void);
+
+#define avm_simple_profiling_spin_lock(lock) ({ \
+    if(avm_simple_profiling_is_enabled_func()) { \
+        unsigned int avm_simple_profiling_spinlock_endtime = avm_get_cycles_func(); \
+        __avm_simple_profiling_spinlock(_RET_IP_, (unsigned int)lock, avm_simple_profiling_spinlock_endtime - avm_simple_profiling_spinlock_starttime, 0); \
+    } \
+})
+
+#define avm_simple_profiling_spin_trylock(lock, success) ({ \
+    if(avm_simple_profiling_is_enabled_func()) { \
+        __avm_simple_profiling_spinlock(_RET_IP_, (unsigned int)lock, 0, success ? 1 : 2); \
+    } \
+})
+
+#define avm_simple_profiling_spin_unlock(lock) ({ \
+    if(avm_simple_profiling_is_enabled_func()) { \
+        __avm_simple_profiling_spinlock(_RET_IP_, (unsigned int)lock, 0, 3); \
+    } \
+})
+
+#define avm_simple_profiling_spin_gettime() unsigned int avm_simple_profiling_spinlock_starttime = avm_get_cycles_func()
+
+extern void __avm_simple_profiling_spinlock(unsigned int addr, unsigned int lock, unsigned int time, unsigned int id);
+
+#else
+static inline void avm_simple_profiling_spin_lock(void *lock __attribute__ ((unused))) { };
+static inline void avm_simple_profiling_spin_trylock(void *lock __attribute__ ((unused)), unsigned int success __attribute__ ((unused))) { };
+static inline void avm_simple_profiling_spin_unlock(void *lock __attribute__ ((unused))) { };
+static inline unsigned int avm_simple_profiling_spin_gettime(void) { return 0; }
+#endif
 #include <linux/prefetch.h>
 
 /*
@@ -61,6 +96,7 @@
 	u32 newval;
 	arch_spinlock_t lockval;
 
+    avm_simple_profiling_spin_gettime();
 	prefetchw(&lock->slock);
 	__asm__ __volatile__(
 "1:	ldrex	%0, [%3]\n"
@@ -78,6 +114,7 @@
 	}
 
 	smp_mb();
+	avm_simple_profiling_spin_lock(lock);
 }
 
 static inline int arch_spin_trylock(arch_spinlock_t *lock)
@@ -97,7 +134,7 @@
 		: "r" (&lock->slock), "I" (1 << TICKET_SHIFT)
 		: "cc");
 	} while (res);
-
+	avm_simple_profiling_spin_trylock(lock, contended);
 	if (!contended) {
 		smp_mb();
 		return 1;
@@ -109,6 +146,8 @@
 static inline void arch_spin_unlock(arch_spinlock_t *lock)
 {
 	smp_mb();
+    
+    avm_simple_profiling_spin_unlock(lock);
 	lock->tickets.owner++;
 	dsb_sev();
 }