From mboxrd@z Thu Jan 1 00:00:00 1970 Message-Id: <20080118182954.589001000@sgi.com> References: <20080118182953.748071000@sgi.com> Date: Fri, 18 Jan 2008 10:29:59 -0800 From: travis@sgi.com Subject: [PATCH 6/7] s390: Use generic percpu Content-Disposition: inline; filename=s390_generic_percpu Sender: owner-linux-mm@kvack.org Return-Path: To: Andrew Morton , Andi Kleen , mingo@elte.hu Cc: Christoph Lameter , linux-mm@kvack.org, linux-kernel@vger.kernel.org, schwidefsky@de.ibm.com List-ID: Change s390 percpu.h to use asm-generic/percpu.h Cc: schwidefsky@de.ibm.com Signed-off-by: Christoph Lameter Signed-off-by: Mike Travis --- V2->V3: On Thu, 29 Nov 2007, Martin Schwidefsky wrote: > On Wed, 2007-11-28 at 13:09 -0800, Christoph Lameter wrote: > > s390 has a special way to determine the pointer to a per cpu area > > plus there is a way to access the base of the per cpu area of the > > currently executing processor. > > > > Note: I had to do a minor change to ASM code. Please check that > > this was done right. > > Hi Christoph, > > after fixing the trainwreck with Gregs kset changes I've got rc3-mm2 > compiled with your percpu patches. The new s390 percpu code works fine: > > Acked-by: Martin Schwidefsky --- include/asm-s390/percpu.h | 33 +++++++++------------------------ 1 file changed, 9 insertions(+), 24 deletions(-) --- a/include/asm-s390/percpu.h +++ b/include/asm-s390/percpu.h @@ -13,40 +13,25 @@ */ #if defined(__s390x__) && defined(MODULE) -#define __reloc_hide(var,offset) (*({ \ +#define SHIFT_PERCPU_PTR(ptr,offset) (({ \ extern int simple_identifier_##var(void); \ unsigned long *__ptr; \ - asm ( "larl %0,per_cpu__"#var"@GOTENT" \ - : "=a" (__ptr) : "X" (per_cpu__##var) ); \ - (typeof(&per_cpu__##var))((*__ptr) + (offset)); })) + asm ( "larl %0, %1@GOTENT" \ + : "=a" (__ptr) : "X" (ptr) ); \ + (typeof(ptr))((*__ptr) + (offset)); })) #else -#define __reloc_hide(var, offset) (*({ \ +#define SHIFT_PERCPU_PTR(ptr, offset) (({ \ extern int simple_identifier_##var(void); \ unsigned long __ptr; \ - asm ( "" : "=a" (__ptr) : "0" (&per_cpu__##var) ); \ - (typeof(&per_cpu__##var)) (__ptr + (offset)); })) + asm ( "" : "=a" (__ptr) : "0" (ptr) ); \ + (typeof(ptr)) (__ptr + (offset)); })) #endif -#ifdef CONFIG_SMP +#define __my_cpu_offset S390_lowcore.percpu_offset -extern unsigned long __per_cpu_offset[NR_CPUS]; - -#define __get_cpu_var(var) __reloc_hide(var,S390_lowcore.percpu_offset) -#define __raw_get_cpu_var(var) __reloc_hide(var,S390_lowcore.percpu_offset) -#define per_cpu(var,cpu) __reloc_hide(var,__per_cpu_offset[cpu]) -#define per_cpu_offset(x) (__per_cpu_offset[x]) - -#else /* ! SMP */ - -#define __get_cpu_var(var) __reloc_hide(var,0) -#define __raw_get_cpu_var(var) __reloc_hide(var,0) -#define per_cpu(var,cpu) __reloc_hide(var,0) - -#endif /* SMP */ - -#define DECLARE_PER_CPU(type, name) extern __typeof__(type) per_cpu__##name +#include #endif /* __ARCH_S390_PERCPU__ */ -- -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org