--- zzzz-none-000/linux-2.6.39.4/arch/arm/include/asm/spinlock.h	2011-08-03 19:43:28.000000000 +0000
+++ puma6-atom-6490-729/linux-2.6.39.4/arch/arm/include/asm/spinlock.h	2021-11-10 13:38:14.000000000 +0000
@@ -5,6 +5,42 @@
 #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
+
 /*
  * sev and wfe are ARMv6K extensions.  Uniprocessor ARMv6 may not have the K
  * extensions, so when running on UP, we have to patch these instructions away.
@@ -78,6 +114,8 @@
 {
 	unsigned long tmp;
 
+	avm_simple_profiling_spin_gettime();
+
 	__asm__ __volatile__(
 "1:	ldrex	%0, [%1]\n"
 "	teq	%0, #0\n"
@@ -90,6 +128,7 @@
 	: "cc");
 
 	smp_mb();
+	avm_simple_profiling_spin_lock(lock);
 }
 
 static inline int arch_spin_trylock(arch_spinlock_t *lock)
@@ -104,6 +143,7 @@
 	: "r" (&lock->lock), "r" (1)
 	: "cc");
 
+	avm_simple_profiling_spin_trylock(lock, tmp);
 	if (tmp == 0) {
 		smp_mb();
 		return 1;
@@ -116,6 +156,8 @@
 {
 	smp_mb();
 
+	avm_simple_profiling_spin_unlock(lock);
+
 	__asm__ __volatile__(
 "	str	%1, [%0]\n"
 	: