On Tue, 2008-05-20 at 16:38 -0500, Scott Wood wrote: > It looks like we rely on -fno-strict-aliasing to prevent reordering > ordinary memory accesses (such as to DMA descriptors) past the I/O > access. It won't prevent reordering of memory reads around an I/O > read, > though, which could be a problem if the I/O read result determines > the > validity of the DMA buffer. IMHO, a memory clobber would be better.
We probably want a full "memory" clobber then... Ben. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
