PowerPC inline volatile assembly instruction in C using GHS compiler

Question

I'm tryting to insert an assembly instruction "isync" in my function using GHS compiler as below

    inline void my_asm(void)
    {
       __inline__ asm volatile("isync");
    }

But I'm getting an compiler error from the above sample. Any help on this would be really appreciated.

Thank you!

1)

    inline void my_asm(void)
    {
       asm volatile("isync");
    }

error: from the above sample ghs compiler is expecting "(" at volatile.

2)

    inline void my_asm(void)
    {
       __inle asm ("isync");
    }

error: "asm" in not allowed

3. only working code is

    inline void my_asm(void)
    {
       asm ("isync");
    }

Any solution and any reference documents would be really appreciated.