[PATCH] Document Linux's memory barriers

[David S. Miller]

From: Paul Mackerras <paulus at samba.org>
Date: Thu, 9 Mar 2006 09:06:05 +1100

> I'd be interested to know what the C standard says about whether the
> compiler can reorder writes that may be visible to a signal handler.
> An interrupt handler in the kernel is logically equivalent to a signal
> handler in normal C code.
> 
> Surely there are some C language lawyers on one of the lists that this
> thread is going to?

Just like for setjmp() I think you have to mark such things
as volatile.