> * David Hildenbrand | 2015-05-11 17:52:16 [+0200]: > > >The !CONFIG_SMP implementation of futex_atomic_op_inuser() seems to rely > >on disabled preemption to guarantee mutual exclusion. > > Yes, this is what the code looks like. It is more the requirement for > ldrex/strex opcodes which are ARMv6+ and so is SMP support (here). > Documentation wise you could replace CONFIG_SMP by > __LINUX_ARM_ARCH__ >= 6 > in a later patch if you like. This would be more in-sync with > arch/arm/include/asm/cmpxchg.h :) > > Sebastian Thanks, I'll include it in the next version. So I assume the cleanest thing to do would be: #if __LINUX_ARM_ARCH__ < 6 preempt_disable(); #endif David -- 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
