From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759484AbYAHCOW (ORCPT ); Mon, 7 Jan 2008 21:14:22 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757208AbYAHCL4 (ORCPT ); Mon, 7 Jan 2008 21:11:56 -0500 Received: from relay2.sgi.com ([192.48.171.30]:36029 "EHLO relay.sgi.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1755006AbYAHCLr (ORCPT ); Mon, 7 Jan 2008 21:11:47 -0500 Message-Id: <20080108021144.012541000@sgi.com> References: <20080108021142.585467000@sgi.com> User-Agent: quilt/0.46-1 Date: Mon, 07 Jan 2008 18:11:50 -0800 From: travis@sgi.com To: mingo@elte.hu, Andrew Morton , Andi Kleen , Christoph Lameter Cc: Jack Steiner , linux-mm@kvack.org, linux-kernel@vger.kernel.org, David Miller Subject: [PATCH 08/10] Sparc64: Use generic percpu Content-Disposition: inline; filename=sparc64_generic_percpu Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org V2->V3: - use generic percpy_modcopy() Sparc64 has a way of providing the base address for the per cpu area of the currently executing processor in a global register. Sparc64 also provides a way to calculate the address of a per cpu area from a base address instead of performing an array lookup. Cc: David Miller Signed-off-by: Christoph Lameter Signed-off-by: Mike Travis --- arch/sparc64/mm/init.c | 5 +++++ include/asm-sparc64/percpu.h | 22 +++------------------- 2 files changed, 8 insertions(+), 19 deletions(-) --- a/arch/sparc64/mm/init.c +++ b/arch/sparc64/mm/init.c @@ -1328,6 +1328,11 @@ pgd_t swapper_pg_dir[2048]; static void sun4u_pgprot_init(void); static void sun4v_pgprot_init(void); +/* Dummy function */ +void __init setup_per_cpu_areas(void) +{ +} + void __init paging_init(void) { unsigned long end_pfn, pages_avail, shift, phys_base; --- a/include/asm-sparc64/percpu.h +++ b/include/asm-sparc64/percpu.h @@ -7,7 +7,6 @@ register unsigned long __local_per_cpu_o #ifdef CONFIG_SMP -#define setup_per_cpu_areas() do { } while (0) extern void real_setup_per_cpu_areas(void); extern unsigned long __per_cpu_base; @@ -16,29 +15,14 @@ extern unsigned long __per_cpu_shift; (__per_cpu_base + ((unsigned long)(__cpu) << __per_cpu_shift)) #define per_cpu_offset(x) (__per_cpu_offset(x)) -/* var is in discarded region: offset to particular copy we want */ -#define per_cpu(var, cpu) (*RELOC_HIDE(&per_cpu__##var, __per_cpu_offset(cpu))) -#define __get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __local_per_cpu_offset)) -#define __raw_get_cpu_var(var) (*RELOC_HIDE(&per_cpu__##var, __local_per_cpu_offset)) - -/* A macro to avoid #include hell... */ -#define percpu_modcopy(pcpudst, src, size) \ -do { \ - unsigned int __i; \ - for_each_possible_cpu(__i) \ - memcpy((pcpudst)+__per_cpu_offset(__i), \ - (src), (size)); \ -} while (0) +#define __my_cpu_offset __local_per_cpu_offset + #else /* ! SMP */ #define real_setup_per_cpu_areas() do { } while (0) -#define per_cpu(var, cpu) (*((void)cpu, &per_cpu__##var)) -#define __get_cpu_var(var) per_cpu__##var -#define __raw_get_cpu_var(var) per_cpu__##var - #endif /* SMP */ -#define DECLARE_PER_CPU(type, name) extern __typeof__(type) per_cpu__##name +#include #endif /* __ARCH_SPARC64_PERCPU__ */ --