From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from pythia.bakeyournoodle.com (pythia.bakeyournoodle.com [203.82.209.197]) by ozlabs.org (Postfix) with ESMTP id 3391DDDF26 for ; Wed, 4 Jul 2007 14:04:16 +1000 (EST) Received: from thor (localhost [127.0.0.1]) by pythia.bakeyournoodle.com (Postfix) with ESMTP id 7FDFF13BB3 for ; Wed, 4 Jul 2007 12:04:15 +0800 (WST) To: From: Tony Breeds Date: Wed, 04 Jul 2007 14:04:31 +1000 Subject: [PATCH 3/3] Initial cut to add __read_mostly support for powerpc. In-Reply-To: <1183521871.36329.499255149967.qpush@thor> Message-Id: <20070704040431.1ED7832C46E@thor> List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Signed-off-by: Tony Breeds --- This didn't get musch feedback the first time I posted it, so it's either perfect ;P or it got missed. arch/powerpc/kernel/vmlinux.lds.S | 6 ++++++ include/asm-powerpc/cache.h | 2 ++ 2 files changed, 8 insertions(+) Index: working/arch/powerpc/kernel/vmlinux.lds.S =================================================================== --- working.orig/arch/powerpc/kernel/vmlinux.lds.S +++ working/arch/powerpc/kernel/vmlinux.lds.S @@ -7,6 +7,7 @@ #define PROVIDE32(x) PROVIDE(x) #endif #include +#include ENTRY(_stext) @@ -211,6 +212,11 @@ SECTIONS *(.data.cacheline_aligned) } + . = ALIGN(L1_CACHE_BYTES); + .data.read_mostly : { + *(.data.read_mostly) + } + . = ALIGN(PAGE_SIZE); __data_nosave : { __nosave_begin = .; Index: working/include/asm-powerpc/cache.h =================================================================== --- working.orig/include/asm-powerpc/cache.h +++ working/include/asm-powerpc/cache.h @@ -34,5 +34,9 @@ struct ppc64_caches { extern struct ppc64_caches ppc64_caches; #endif /* __powerpc64__ && ! __ASSEMBLY__ */ +#if !defined(__ASSEMBLY__) +#define __read_mostly __attribute__((__section__(".data.read_mostly"))) +#endif + #endif /* __KERNEL__ */ #endif /* _ASM_POWERPC_CACHE_H */