From: Scott Wood <[EMAIL PROTECTED]> Date: Tue, 20 May 2008 17:43:58 -0500
> David Miller wrote: > > The __volatile__ in the asm construct disallows movement of the > > inline asm relative to statements surrounding it. > > > > The only reason barrier() in kernel.h needs a memory clobber is > > because of a bug in ancient versions of gcc. In fact, I think > > that memory clobber might even be removable. > > Current versions of GCC seem quite happy to move non-asm memory accesses > around a volatile asm without a memory clobber; see the test Trent posted. Indeed, and even the GCC manual is clear about this. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
