Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S264728AbUDUEDu (ORCPT ); Wed, 21 Apr 2004 00:03:50 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S264721AbUDUEBW (ORCPT ); Wed, 21 Apr 2004 00:01:22 -0400 Received: from ip-66-80-228-130.sjc.megapath.net ([66.80.228.130]:15859 "EHLO sodium.co.intel.com") by vger.kernel.org with ESMTP id S264702AbUDUD6W (ORCPT ); Tue, 20 Apr 2004 23:58:22 -0400 Date: Tue, 20 Apr 2004 21:03:41 -0700 From: inaky.perez-gonzalez@intel.com To: linux-kernel@vger.kernel.org Cc: inaky.perez-gonzalez@intel.com Subject: [RFC/PATCH] FUSYN 3/11: Support for i386 Message-ID: <0404202103.7dddec5a7cpbMcecWavajakcibKb5ckb1457@intel.com> Content-Type: text/plain Content-Transfer-Encoding: 7bit In-Reply-To: <0404202103.Eajc1b.dndIaLbXawacc8drbScVdPaPa1457@intel.com> X-Mailer: patchbomb 0.0.1 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3495 Lines: 109 arch/i386/kernel/entry.S | 5 +++ include/asm-i386/fulock.h | 70 ++++++++++++++++++++++++++++++++++++++++++++++ include/asm-i386/unistd.h | 7 +++- 3 files changed, 81 insertions(+), 1 deletion(-) --- arch/i386/kernel/entry.S:1.1.1.13 Tue Apr 6 01:51:19 2004 +++ arch/i386/kernel/entry.S Tue Apr 6 02:15:23 2004 @@ -882,5 +882,10 @@ .long sys_utimes .long sys_fadvise64_64 .long sys_ni_syscall /* sys_vserver */ + .long sys_ufulock_lock + .long sys_ufulock_unlock /* 275 */ + .long sys_ufulock_ctl + .long sys_ufuqueue_wait + .long sys_ufuqueue_wake /* 278 */ syscall_table_size=(.-sys_call_table) --- /dev/null Thu Apr 15 00:58:25 2004 +++ include/asm-i386/fulock.h Mon Feb 2 23:07:28 2004 @@ -0,0 +1,70 @@ + +/* + * Fast User real-time/pi/pp/robust/deadlock SYNchronization + * (C) 2002-2003 Intel Corp + * Inaky Perez-Gonzalez . + * + * Licensed under the FSF's GNU Public License v2 or later. + * + * Based on normal futexes (futex.c), (C) Rusty Russell. + * Please refer to Documentation/fusyn.txt for more info. + */ + +#ifndef __asm_i386_fulock_h__ +#define __asm_i386_fulock_h__ + + /* fulock value / state; anything that is not this is a PID that + * currently owns the fulock. */ + +enum vfulock { + VFULOCK_UNLOCKED = 0x00000000, /* Unlocked */ + VFULOCK_HEALTHY = VFULOCK_UNLOCKED, /* KCO mode: the lock is healthy */ + VFULOCK_WP = 0xfffffffd, /* Waiters blocked in the kernel */ + VFULOCK_DEAD = 0xfffffffe, /* dead, kernel controls ownership */ + VFULOCK_NR = 0xffffffff /* fulock is not-recoverable */ +}; + + +#ifdef __KERNEL__ + +/** + * [User usable] Atomic compare and swap. + * + * Used for locking a vfulock. + * + * @value Pointer to the value to compare and swap. + * @old_value Value that *value has to have for the swap to occur. + * @new_value New value to set it *value == old_value. + * @return !0 if the swap succeeded. 0 if failed. + */ +static inline +unsigned vfulock_acas (volatile unsigned *value, + unsigned old_value, unsigned new_value) +{ + unsigned result; + asm __volatile__ ( + "lock cmpxchg %3, %1" + : "=a" (result), "+m" ((*value)) + : "a" (old_value), "r" (new_value) + : "memory"); + return result == old_value; +} + + +/** + * Set an ufulock's associated value. + * + * @vfulock: Pointer to the address of the ufulock to contain for. + * @value: New value to assign. + * + * Wrapper for arch-specific idiosyncrasies when setting a value that + * is shared across different address mappings. + */ +static inline +void vfulock_set (volatile unsigned *vfulock, unsigned value) +{ + *vfulock = value; +} + +#endif /* #ifdef __KERNEL__ */ +#endif /* #ifndef __asm_i386_fulock_h__ */ --- include/asm-i386/unistd.h:1.1.1.8 Tue Apr 6 01:51:33 2004 +++ include/asm-i386/unistd.h Tue Apr 6 02:16:24 2004 @@ -279,8 +279,13 @@ #define __NR_utimes 271 #define __NR_fadvise64_64 272 #define __NR_vserver 273 +#define __NR_ufulock_lock 274 +#define __NR_ufulock_unlock 275 +#define __NR_ufulock_ctl 276 +#define __NR_ufuqueue_wait 277 +#define __NR_ufuqueue_wake 278 -#define NR_syscalls 274 +#define NR_syscalls 279 /* user-visible error numbers are in the range -1 - -124: see */ - 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/