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Date: Thu, 27 Dec 2007 16:18:09 -0800 (PST) From: David Miller <davem@...emloft.net> To: travis@....com Cc: akpm@...ux-foundation.org, clameter@....com, linux-mm@...ck.org, linux-kernel@...r.kernel.org, rusty@...tcorp.com.au, ak@...e.de Subject: Re: [PATCH 03/10] percpu: Make the asm-generic/percpu.h more "generic" From: travis@....com Date: Thu, 27 Dec 2007 16:10:49 -0800 > V1->V2: > - add support for PER_CPU_ATTRIBUTES > > Add the ability to use generic/percpu even if the arch needs to override > several aspects of its operations. This will enable the use of generic > percpu.h for all arches. > > An arch may define: > > __per_cpu_offset Do not use the generic pointer array. Arch must > define per_cpu_offset(cpu) (used by x86_64, s390). > > __my_cpu_offset Can be defined to provide an optimized way to determine > the offset for variables of the currently executing > processor. Used by ia64, x86_64, x86_32, sparc64, s/390. > > SHIFT_PTR(ptr, offset) If an arch defines it then special handling > of pointer arithmentic may be implemented. Used > by s/390. > > > (Some of these special percpu arch implementations may be later consolidated > so that there are less cases to deal with.) > > Cc: Rusty Russell <rusty@...tcorp.com.au> > Cc: Andi Kleen <ak@...e.de> > Signed-off-by: Christoph Lameter <clameter@....com> > Signed-off-by: Mike Travis <travis@....com> Acked-by: David S. Miller <davem@...emloft.net> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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