From mboxrd@z Thu Jan 1 00:00:00 1970 From: akpm@linux-foundation.org Subject: + add-cmpxchg_local-to-parisc.patch added to -mm tree Date: Thu, 01 Nov 2007 12:09:12 -0700 Message-ID: <20071101190912.BEFBA432BDE@localhost> Reply-To: linux-kernel@vger.kernel.org Return-path: Received: from smtp-out.google.com ([216.239.45.13]:30249 "EHLO smtp-out.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754872AbXKATK5 (ORCPT ); Thu, 1 Nov 2007 15:10:57 -0400 Sender: mm-commits-owner@vger.kernel.org List-Id: mm-commits@vger.kernel.org To: mm-commits@vger.kernel.org Cc: mathieu.desnoyers@polymtl.ca, grundler@parisc-linux.org, kyle@mcmartin.ca, willy@debian.org The patch titled Add cmpxchg_local to parisc has been added to the -mm tree. Its filename is add-cmpxchg_local-to-parisc.patch *** Remember to use Documentation/SubmitChecklist when testing your code *** See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find out what to do about this ------------------------------------------------------ Subject: Add cmpxchg_local to parisc From: Mathieu Desnoyers Use the new generic cmpxchg_local (disables interrupt). Also use the generic cmpxchg as fallback if SMP is not set. Signed-off-by: Mathieu Desnoyers Cc: Kyle McMartin Cc: Grant Grundler Cc: Matthew Wilcox Signed-off-by: Andrew Morton --- include/asm-parisc/atomic.h | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) diff -puN include/asm-parisc/atomic.h~add-cmpxchg_local-to-parisc include/asm-parisc/atomic.h --- a/include/asm-parisc/atomic.h~add-cmpxchg_local-to-parisc +++ a/include/asm-parisc/atomic.h @@ -122,6 +122,39 @@ __cmpxchg(volatile void *ptr, unsigned l (unsigned long)_n_, sizeof(*(ptr))); \ }) +#include + +static inline unsigned long __cmpxchg_local(volatile void *ptr, + unsigned long old, + unsigned long new_, int size) +{ + switch (size) { +#ifdef CONFIG_64BIT + case 8: return __cmpxchg_u64((unsigned long *)ptr, old, new_); +#endif + case 4: return __cmpxchg_u32(ptr, old, new_); + default: + return __cmpxchg_local_generic(ptr, old, new_, size); + } +} + +/* + * cmpxchg_local and cmpxchg64_local are atomic wrt current CPU. Always make + * them available. + */ +#define cmpxchg_local(ptr, o, n) \ + ((__typeof__(*(ptr)))__cmpxchg_local((ptr), (unsigned long)(o), \ + (unsigned long)(n), sizeof(*(ptr)))) +#ifdef CONFIG_64BIT +#define cmpxchg64_local(ptr, o, n) \ + ({ \ + BUILD_BUG_ON(sizeof(*(ptr)) != 8); \ + cmpxchg_local((ptr), (o), (n)); \ + }) +#else +#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n)) +#endif + /* Note that we need not lock read accesses - aligned word writes/reads * are atomic, so a reader never sees unconsistent values. * _ Patches currently in -mm which might be from mathieu.desnoyers@polymtl.ca are local_t-documentation-update-2.patch markers-fix-warnings.patch add-cmpxchg_local-to-asm-generic-for-per-cpu-atomic-operations.patch fall-back-on-interrupt-disable-in-cmpxchg8b-on-80386-and-80486.patch add-cmpxchg64-and-cmpxchg64_local-to-alpha.patch add-cmpxchg64-and-cmpxchg64_local-to-mips.patch add-cmpxchg64-and-cmpxchg64_local-to-powerpc.patch add-cmpxchg64-and-cmpxchg64_local-to-x86_64.patch add-cmpxchg_local-to-arm.patch add-cmpxchg_local-to-avr32.patch add-cmpxchg_local-to-blackfin-replace-__cmpxchg-by-generic-cmpxchg.patch add-cmpxchg_local-to-cris.patch add-cmpxchg_local-to-frv.patch add-cmpxchg_local-to-h8300.patch add-cmpxchg_local-cmpxchg64-and-cmpxchg64_local-to-ia64.patch new-cmpxchg_local-optimized-for-up-case-for-m32r.patch fix-m32r-__xchg.patch m32r-build-fix-of-arch-m32r-kernel-smpbootc.patch local_t-m32r-use-architecture-specific-cmpxchg_local.patch add-cmpxchg_local-to-m86k.patch add-cmpxchg_local-to-m68knommu.patch add-cmpxchg_local-to-parisc.patch add-cmpxchg_local-to-ppc.patch add-cmpxchg_local-to-s390.patch add-cmpxchg_local-to-sh-use-generic-cmpxchg-instead-of-cmpxchg_u32.patch add-cmpxchg_local-to-sh64.patch add-cmpxchg_local-to-sparc-move-__cmpxchg-to-systemh.patch add-cmpxchg_local-to-sparc64.patch add-cmpxchg_local-to-v850.patch add-cmpxchg_local-to-xtensa.patch