Just a ugly debug patch, use pthread spinlock for non-x86 platform
    
    Signed-off-by: Lin Ming <ming.m.lin@intel.com>

diff --git a/time-warp-test.c b/time-warp-test.c
index df51b2b..66e3d3c 100644
--- a/time-warp-test.c
+++ b/time-warp-test.c
@@ -31,6 +31,7 @@
 #include <assert.h>
 #include <sched.h>
 #include <time.h>
+#include <pthread.h>
 
 #define TEST_TSC 0
 #define TEST_TOD 0
@@ -50,7 +51,7 @@
  * Shared locks and variables between the test tasks:
  */
 enum {
-	SHARED_LOCK		= 0,
+	SHARED_LOCK2		= 0,
 	SHARED_TSC		= 2,
 	SHARED_TOD		= 4,
 	SHARED_CLOCK		= 6,
@@ -63,7 +64,8 @@ enum {
 	SHARED_NR_TOD_WARPS	= 20,
 	SHARED_NR_CLOCK_LOOPS	= 22,
 	SHARED_NR_CLOCK_WARPS	= 24,
-	SHARED_END		= 26,
+	SHARED_LOCK		= 26,
+	SHARED_END		= 34,
 };
 
 #define SHARED(x)	(*(shared + SHARED_##x))
@@ -138,8 +140,10 @@ static unsigned long *setup_shared_var(void)
 	return buf;
 }
 
-static inline void lock(unsigned long *flag)
+static inline void lock(pthread_spinlock_t *slock)
 {
+	pthread_spin_lock(slock);
+/*
 #if 0
 	__asm__ __volatile__(
 		"1: lock; btsl $0,%0\n"
@@ -156,10 +160,13 @@ static inline void lock(unsigned long *flag)
                "3:"
                : "+m"(*flag) : : "memory");
 #endif
+*/
 }
 
-static inline void unlock(unsigned long *flag)
+static inline void unlock(pthread_spinlock_t *slock)
 {
+	pthread_spin_unlock(slock);
+/*
 #if 0
 	__asm__ __volatile__(
 		"lock; btrl $0,%0\n"
@@ -168,6 +175,7 @@ static inline void unlock(unsigned long *flag)
 #else
 	__asm__ __volatile__("movl $0,%0; rep; nop" : "=g"(*flag) :: "memory");
 #endif
+*/
 }
 
 static void print_status(unsigned long *shared)
@@ -278,29 +286,29 @@ static inline void test_TOD(unsigned long *shared)
 #endif
 }
 
-static inline void test_CLOCK(unsigned long *shared)
+static inline void test_CLOCK(unsigned long *shared, pthread_spinlock_t *slock)
 {
 #if TEST_CLOCK
 	usecs_t T0, T1;
 	long long delta;
 
-	lock(&SHARED(LOCK));
+	lock(slock);
 	rdclock(T1);
 	T0 = SHARED_LL(CLOCK);
 	SHARED_LL(CLOCK) = T1;
 	SHARED_LL(NR_CLOCK_LOOPS)++;
-	unlock(&SHARED(LOCK));
+	unlock(slock);
 
 	delta = T1-T0;
 	if (delta < 0) {
-		lock(&SHARED(LOCK));
+		lock(slock);
 		SHARED(NR_CLOCK_WARPS)++;
 		if (delta < SHARED_LL(WORST_CLOCK)) {
 			SHARED_LL(WORST_CLOCK) = delta;
 			fprintf(stderr, "\rnew CLOCK-warp maximum: %9Ld nsecs,  %016Lx -> %016Lx\n",
 				delta, T0, T1);
 		}
-		unlock(&SHARED(LOCK));
+		unlock(slock);
 	}
 #endif
 }
@@ -310,6 +318,7 @@ int main(int argc, char **argv)
 	int i, parent, me;
 	unsigned long *shared;
 	unsigned long cpus, tasks;
+	pthread_spinlock_t *slock;
 
 	cpus = system("exit `grep ^processor /proc/cpuinfo  | wc -l`");
 	cpus = WEXITSTATUS(cpus);
@@ -342,6 +351,12 @@ usage:
 		);
 	shared = setup_shared_var();
 
+	slock = (pthread_spinlock_t *) (&SHARED(LOCK));
+	if (pthread_spin_init(slock, PTHREAD_PROCESS_SHARED)) {
+		perror("pthread_spin_init");
+		exit(-1);
+	}
+
 	parent = getpid();
 
 	for (i = 1; i < tasks; i++) {
@@ -358,7 +373,7 @@ usage:
 		for (i = 0; i < 10; i++)
 			test_TOD(shared);
 		for (i = 0; i < 10; i++)
-			test_CLOCK(shared);
+			test_CLOCK(shared, slock);
 
 		if (me == parent)
 			print_status(shared);