Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932246AbXHCN4j (ORCPT ); Fri, 3 Aug 2007 09:56:39 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1761737AbXHCNz6 (ORCPT ); Fri, 3 Aug 2007 09:55:58 -0400 Received: from perninha.conectiva.com.br ([200.140.247.100]:37666 "EHLO perninha.conectiva.com.br" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1761475AbXHCNz4 (ORCPT ); Fri, 3 Aug 2007 09:55:56 -0400 Date: Fri, 3 Aug 2007 10:55:40 -0300 From: "Luiz Fernando N. Capitulino" To: Andrew Morton Cc: linux-kernel@vger.kernel.org, mingo@elte.hu Subject: [PATCH] i386: convert mm_context_t semaphore to a mutex Message-ID: <20070803105540.4f85ae09@localhost> Organization: Mandriva X-Mailer: Claws Mail 2.10.0 (GTK+ 2.11.6; i586-mandriva-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3383 Lines: 122 Signed-off-by: Luiz Fernando N. Capitulino --- arch/i386/kernel/i386_ksyms.c | 1 + arch/i386/kernel/ldt.c | 14 +++++++------- arch/i386/kernel/ptrace.c | 4 ++-- include/asm-i386/mmu.h | 4 ++-- 4 files changed, 12 insertions(+), 11 deletions(-) --- linux-2.6-lcpt.orig/arch/i386/kernel/ldt.c +++ linux-2.6-lcpt/arch/i386/kernel/ldt.c @@ -94,13 +94,13 @@ int init_new_context(struct task_struct struct mm_struct * old_mm; int retval = 0; - init_MUTEX(&mm->context.sem); + mutex_init(&mm->context.lock); mm->context.size = 0; old_mm = current->mm; if (old_mm && old_mm->context.size > 0) { - down(&old_mm->context.sem); + mutex_lock(&old_mm->context.lock); retval = copy_ldt(&mm->context, &old_mm->context); - up(&old_mm->context.sem); + mutex_unlock(&old_mm->context.lock); } return retval; } @@ -132,7 +132,7 @@ static int read_ldt(void __user * ptr, u if (bytecount > LDT_ENTRY_SIZE*LDT_ENTRIES) bytecount = LDT_ENTRY_SIZE*LDT_ENTRIES; - down(&mm->context.sem); + mutex_lock(&mm->context.lock); size = mm->context.size*LDT_ENTRY_SIZE; if (size > bytecount) size = bytecount; @@ -140,7 +140,7 @@ static int read_ldt(void __user * ptr, u err = 0; if (copy_to_user(ptr, mm->context.ldt, size)) err = -EFAULT; - up(&mm->context.sem); + mutex_unlock(&mm->context.lock); if (err < 0) goto error_return; if (size != bytecount) { @@ -196,7 +196,7 @@ static int write_ldt(void __user * ptr, goto out; } - down(&mm->context.sem); + mutex_lock(&mm->context.lock); if (ldt_info.entry_number >= mm->context.size) { error = alloc_ldt(¤t->mm->context, ldt_info.entry_number+1, 1); if (error < 0) @@ -223,7 +223,7 @@ install: error = 0; out_unlock: - up(&mm->context.sem); + mutex_unlock(&mm->context.lock); out: return error; } --- linux-2.6-lcpt.orig/arch/i386/kernel/ptrace.c +++ linux-2.6-lcpt/arch/i386/kernel/ptrace.c @@ -166,7 +166,7 @@ static unsigned long convert_eip_to_line seg &= ~7UL; - down(&child->mm->context.sem); + mutex_lock(&child->mm->context.lock); if (unlikely((seg >> 3) >= child->mm->context.size)) addr = -1L; /* bogus selector, access would fault */ else { @@ -180,7 +180,7 @@ static unsigned long convert_eip_to_line addr &= 0xffff; addr += base; } - up(&child->mm->context.sem); + mutex_unlock(&child->mm->context.lock); } return addr; } --- linux-2.6-lcpt.orig/include/asm-i386/mmu.h +++ linux-2.6-lcpt/include/asm-i386/mmu.h @@ -1,7 +1,7 @@ #ifndef __i386_MMU_H #define __i386_MMU_H -#include +#include /* * The i386 doesn't have a mmu context, but * we put the segment information here. @@ -10,7 +10,7 @@ */ typedef struct { int size; - struct semaphore sem; + struct mutex lock; void *ldt; void *vdso; } mm_context_t; --- linux-2.6-lcpt.orig/arch/i386/kernel/i386_ksyms.c +++ linux-2.6-lcpt/arch/i386/kernel/i386_ksyms.c @@ -1,4 +1,5 @@ #include +#include #include #include -- Luiz Fernando N. Capitulino - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/