From mboxrd@z Thu Jan 1 00:00:00 1970 Message-Id: <20071030192103.932633073@polymtl.ca> References: <20071030191557.947156623@polymtl.ca> Date: Tue, 30 Oct 2007 15:16:05 -0400 From: Mathieu Desnoyers Subject: [patch 08/28] Add cmpxchg_local to avr32 Content-Disposition: inline; filename=add-cmpxchg-local-to-avr32.patch Sender: owner-linux-mm@kvack.org Return-Path: To: akpm@linux-foundation.org, linux-kernel@vger.kernel.org, matthew@wil.cx, linux-arch@vger.kernel.org, penberg@cs.helsinki.fi, linux-mm@kvack.org, Christoph Lameter Cc: Mathieu Desnoyers , Haavard Skinnemoen List-ID: Use the new generic cmpxchg_local (disables interrupt) for 8, 16 and 64 bits cmpxchg_local. Use the __cmpxchg_u32 primitive for 32 bits cmpxchg_local. Note that cmpxchg only uses the __cmpxchg_u32 or __cmpxchg_u64 and will cause a linker error if called with 8 or 16 bits argument. Signed-off-by: Mathieu Desnoyers Acked-by: Haavard Skinnemoen CC: clameter@sgi.com CC: hskinnemoen@atmel.com --- include/asm-avr32/system.h | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) Index: linux-2.6-lttng/include/asm-avr32/system.h =================================================================== --- linux-2.6-lttng.orig/include/asm-avr32/system.h 2007-07-20 19:10:57.000000000 -0400 +++ linux-2.6-lttng/include/asm-avr32/system.h 2007-07-20 19:32:36.000000000 -0400 @@ -140,6 +140,29 @@ static inline unsigned long __cmpxchg(vo (unsigned long)(new), \ sizeof(*(ptr)))) +#include + +static inline unsigned long __cmpxchg_local(volatile void *ptr, + unsigned long old, + unsigned long new, int size) +{ + switch (size) { + case 4: + return __cmpxchg_u32(ptr, old, new); + default: + return __cmpxchg_local_generic(ptr, old, new, size); + } + + return old; +} + +#define cmpxchg_local(ptr, old, new) \ + ((typeof(*(ptr)))__cmpxchg_local((ptr), (unsigned long)(old), \ + (unsigned long)(new), \ + sizeof(*(ptr)))) + +#define cmpxchg64_local(ptr,o,n) __cmpxchg64_local_generic((ptr), (o), (n)) + struct pt_regs; void NORET_TYPE die(const char *str, struct pt_regs *regs, long err); void _exception(long signr, struct pt_regs *regs, int code, -- Mathieu Desnoyers Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68 -- 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