src/os_cpu/linux_x86/vm/linux_x86_32.s

@@ -612,12 +612,11 @@
         ret
 
 
         # Support for jlong Atomic::cmpxchg(jlong exchange_value,
         #                                   volatile jlong* dest,
-        #                                   jlong compare_value,
-        #                                   bool is_MP)
+        #                                   jlong compare_value)
         #
         .p2align 4,,15
         .type    _Atomic_cmpxchg_long,@function
 _Atomic_cmpxchg_long:
                                    #  8(%esp) : return PC

@@ -626,14 +625,11 @@
         movl     12(%esp), %ebx    # 12(%esp) : exchange_value (low)
         movl     16(%esp), %ecx    # 16(%esp) : exchange_value (high)
         movl     24(%esp), %eax    # 24(%esp) : compare_value (low)
         movl     28(%esp), %edx    # 28(%esp) : compare_value (high)
         movl     20(%esp), %edi    # 20(%esp) : dest
-        cmpl     $0, 32(%esp)      # 32(%esp) : is_MP
-        je       1f
-        lock
-1:      cmpxchg8b (%edi)
+        lock cmpxchg8b (%edi)
         popl     %edi
         popl     %ebx
         ret