diff -ru gperftools-2.4/src/base/linux_syscall_support.h gperftools-2.4-fixed/src/base/linux_syscall_support.h
--- gperftools-2.4/src/base/linux_syscall_support.h	2014-12-06 23:51:40.000000000 +0100
+++ gperftools-2.4-fixed/src/base/linux_syscall_support.h	2015-06-01 16:51:03.725616215 +0200
@@ -83,7 +83,6 @@
  *      sys_fcntl(
  *      sys_fstat(
  *      sys_futex(
- *      sys_futex1(
  *      sys_getcpu(
  *      sys_getdents64(
  *      sys_getppid(
@@ -2094,9 +2093,11 @@
                        int,            c, long,   a)
   LSS_INLINE _syscall2(int,     fstat,           int,         f,
                       struct kernel_stat*,   b)
-  LSS_INLINE _syscall4(int,     futex,           int*,        a,
+  LSS_INLINE _syscall6(int,     futex,           int*,        a,
                        int,            o, int,    v,
-                      struct kernel_timespec*, t)
+                      struct kernel_timespec*, t,
+                       int*, a2,
+                       int, v3)
 #ifdef __NR_getdents64
     LSS_INLINE _syscall3(int,     getdents64,      int,         f,
                          struct kernel_dirent64*, d, int,    c)
diff -ru gperftools-2.4/src/base/spinlock_linux-inl.h gperftools-2.4-fixed/src/base/spinlock_linux-inl.h
--- gperftools-2.4/src/base/spinlock_linux-inl.h	2014-12-06 23:51:40.000000000 +0100
+++ gperftools-2.4-fixed/src/base/spinlock_linux-inl.h	2015-06-01 16:51:03.725616215 +0200
@@ -51,15 +51,10 @@
     int x = 0;
     // futexes are ints, so we can use them only when
     // that's the same size as the lockword_ in SpinLock.
-#ifdef __arm__
-    // ARM linux doesn't support sys_futex1(void*, int, int, struct timespec*);
-    have_futex = 0;
-#else
     have_futex = (sizeof (Atomic32) == sizeof (int) &&
-                  sys_futex(&x, FUTEX_WAKE, 1, 0) >= 0);
-#endif
+                  sys_futex(&x, FUTEX_WAKE, 1, NULL, NULL, 0) >= 0);
     if (have_futex &&
-        sys_futex(&x, FUTEX_WAKE | futex_private_flag, 1, 0) < 0) {
+        sys_futex(&x, FUTEX_WAKE | futex_private_flag, 1, NULL, NULL, 0) < 0) {
       futex_private_flag = 0;
     }
   }
@@ -85,7 +85,8 @@
       tm.tv_nsec *= 16;  // increase the delay; we expect explicit wakeups
       sys_futex(reinterpret_cast<int *>(const_cast<Atomic32 *>(w)),
                 FUTEX_WAIT | futex_private_flag,
-                value, reinterpret_cast<struct kernel_timespec *>(&tm));
+                value, reinterpret_cast<struct kernel_timespec *>(&tm),
+                NULL, 0);
     } else {
       nanosleep(&tm, NULL);
     }
@@ -96,7 +97,8 @@
 void SpinLockWake(volatile Atomic32 *w, bool all) {
   if (have_futex) {
     sys_futex(reinterpret_cast<int *>(const_cast<Atomic32 *>(w)),
-              FUTEX_WAKE | futex_private_flag, all? INT_MAX : 1, 0);
+              FUTEX_WAKE | futex_private_flag, all? INT_MAX : 1,
+              NULL, NULL, 0);
   }
 }