On Wednesday 30 March 2011, Thomas Gleixner wrote: > The problem is that you need cmpxchg in user space as well. > > ARM does this with some syscall magic for machines which do not have > cmpxchg. Ah, right. I wonder how sh does it. I also remember that the original unicore32 ABI had support for a cmpxchg system call, but that was removed with the move to the generic syscall table. It is of course possible to add it back using the __NR_arch_specific_syscall entry point. Arnd -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
