On Thu, Jun 10, 2010 at 03:04:04PM -0700, Richard Henderson wrote: > On 06/09/2010 03:55 PM, Aurelien Jarno wrote: > > On Fri, Jun 04, 2010 at 12:14:13PM -0700, Richard Henderson wrote: > >> Before gcc 4.2, __builtin___clear_cache doesn't exist, and > >> afterward the gcc s390 backend implements it as nothing. > > > > Does it means that instruction and data caches are coherent on s390? > > Yes. > > Principles of Operation, 2.1 Main storage: > # Main storage may include a faster-access buffer storage, sometimes called a > cache. > # Each CPU may have an associated cache. The effects, except on performance, > of > # the physical construction and the use of distinct storage media are not > observable > # by the program. > > This architecture pre-dates caches, I think. ;-)
Ok, I have applied the patch -- Aurelien Jarno GPG: 1024D/F1BCDB73 aurel...@aurel32.net http://www.aurel32.net
