From patchwork Mon Feb 14 16:34:48 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arnd Bergmann X-Patchwork-Id: 12745824 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BDC9EC43217 for ; Mon, 14 Feb 2022 16:37:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236381AbiBNQh5 (ORCPT ); Mon, 14 Feb 2022 11:37:57 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:43514 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1356630AbiBNQhs (ORCPT ); Mon, 14 Feb 2022 11:37:48 -0500 Received: from sin.source.kernel.org (sin.source.kernel.org [145.40.73.55]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CA83D60D9B; Mon, 14 Feb 2022 08:37:37 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sin.source.kernel.org (Postfix) with ESMTPS id D322ECE19DE; Mon, 14 Feb 2022 16:37:35 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 364C2C340EB; Mon, 14 Feb 2022 16:37:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1644856654; bh=qlMd8rKvrr7wJQut+MJjWASUZxJ8noHUfphyHHpK8zI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=SZTZdvp3HO/Gbio6pUMfS3VPBiBUrjIxOQFnfXj6gp1TgHkIcBbgGCmUf4okn70pR Kkitb3y9JYkIxvpGFR2P253lfPB7ByEuPu2t6M+s5fOTCIVC4HGEoL7B1SslRlUUhH Foa+uU+W8IycwOBmVeoy95ItqwtBxi1GpAIb6jmn+lshQSU6w30xxEbfsYhbUNMwSA T45LdTjRLx6+br9T8NNqETDat7ql0BhdzYX6sAt3QhQ4Ey3WRS6iz6d584cFXweToe GZif6HVQZqMsE1QQ1g9vW8lVohYZmWKnjnjeSA+XlIMnXxhxoRI8MCBxEoz6NoXOyB UE5fXaIrZY82w== From: Arnd Bergmann To: Linus Torvalds , Christoph Hellwig , linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-api@vger.kernel.org, arnd@arndb.de, linux-kernel@vger.kernel.org Cc: linux@armlinux.org.uk, will@kernel.org, guoren@kernel.org, bcain@codeaurora.org, geert@linux-m68k.org, monstr@monstr.eu, tsbogend@alpha.franken.de, nickhu@andestech.com, green.hu@gmail.com, dinguyen@kernel.org, shorne@gmail.com, deller@gmx.de, mpe@ellerman.id.au, peterz@infradead.org, mingo@redhat.com, mark.rutland@arm.com, hca@linux.ibm.com, dalias@libc.org, davem@davemloft.net, richard@nod.at, x86@kernel.org, jcmvbkbc@gmail.com, ebiederm@xmission.com, akpm@linux-foundation.org, ardb@kernel.org, linux-alpha@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-xtensa@linux-xtensa.org Subject: [PATCH 10/14] uaccess: remove most CONFIG_SET_FS users Date: Mon, 14 Feb 2022 17:34:48 +0100 Message-Id: <20220214163452.1568807-11-arnd@kernel.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20220214163452.1568807-1-arnd@kernel.org> References: <20220214163452.1568807-1-arnd@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org From: Arnd Bergmann On almost all architectures, there are no remaining callers of set_fs(), so CONFIG_SET_FS can be disabled, along with removing the thread_info field and any references to it. This turns access_ok() into a cheaper check against TASK_SIZE_MAX. Signed-off-by: Arnd Bergmann --- arch/alpha/Kconfig | 1 - arch/alpha/include/asm/processor.h | 4 -- arch/alpha/include/asm/thread_info.h | 2 - arch/alpha/include/asm/uaccess.h | 19 ------ arch/arc/Kconfig | 1 - arch/arc/include/asm/segment.h | 20 ------- arch/arc/include/asm/thread_info.h | 3 - arch/arc/include/asm/uaccess.h | 1 - arch/csky/Kconfig | 1 - arch/csky/include/asm/processor.h | 2 - arch/csky/include/asm/segment.h | 10 ---- arch/csky/include/asm/thread_info.h | 2 - arch/csky/include/asm/uaccess.h | 3 - arch/csky/kernel/asm-offsets.c | 1 - arch/h8300/Kconfig | 1 - arch/h8300/include/asm/processor.h | 1 - arch/h8300/include/asm/segment.h | 40 ------------- arch/h8300/include/asm/thread_info.h | 3 - arch/h8300/kernel/entry.S | 1 - arch/h8300/kernel/head_ram.S | 1 - arch/h8300/mm/init.c | 6 -- arch/h8300/mm/memory.c | 1 - arch/hexagon/Kconfig | 1 - arch/hexagon/include/asm/thread_info.h | 6 -- arch/hexagon/kernel/process.c | 1 - arch/microblaze/Kconfig | 1 - arch/microblaze/include/asm/thread_info.h | 6 -- arch/microblaze/include/asm/uaccess.h | 24 -------- arch/microblaze/kernel/asm-offsets.c | 1 - arch/microblaze/kernel/process.c | 1 - arch/nds32/Kconfig | 1 - arch/nds32/include/asm/thread_info.h | 4 -- arch/nds32/include/asm/uaccess.h | 15 +---- arch/nds32/mm/alignment.c | 3 - arch/nios2/Kconfig | 1 - arch/nios2/include/asm/thread_info.h | 9 --- arch/nios2/include/asm/uaccess.h | 12 ---- arch/openrisc/Kconfig | 1 - arch/openrisc/include/asm/thread_info.h | 7 --- arch/openrisc/include/asm/uaccess.h | 23 -------- arch/sparc/Kconfig | 2 +- arch/sparc/include/asm/processor_32.h | 6 -- arch/sparc/include/asm/uaccess_32.h | 13 ----- arch/sparc/kernel/process_32.c | 2 - arch/xtensa/Kconfig | 1 - arch/xtensa/include/asm/asm-uaccess.h | 71 ----------------------- arch/xtensa/include/asm/processor.h | 7 --- arch/xtensa/include/asm/thread_info.h | 3 - arch/xtensa/include/asm/uaccess.h | 16 ----- arch/xtensa/kernel/asm-offsets.c | 3 - include/asm-generic/uaccess.h | 25 +------- 51 files changed, 3 insertions(+), 387 deletions(-) delete mode 100644 arch/arc/include/asm/segment.h delete mode 100644 arch/csky/include/asm/segment.h delete mode 100644 arch/h8300/include/asm/segment.h diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig index 4e87783c90ad..eee8b5b0a58b 100644 --- a/arch/alpha/Kconfig +++ b/arch/alpha/Kconfig @@ -35,7 +35,6 @@ config ALPHA select OLD_SIGSUSPEND select CPU_NO_EFFICIENT_FFS if !ALPHA_EV67 select MMU_GATHER_NO_RANGE - select SET_FS select SPARSEMEM_EXTREME if SPARSEMEM select ZONE_DMA help diff --git a/arch/alpha/include/asm/processor.h b/arch/alpha/include/asm/processor.h index 090499c99c1c..43e234c518b1 100644 --- a/arch/alpha/include/asm/processor.h +++ b/arch/alpha/include/asm/processor.h @@ -26,10 +26,6 @@ #define TASK_UNMAPPED_BASE \ ((current->personality & ADDR_LIMIT_32BIT) ? 0x40000000 : TASK_SIZE / 2) -typedef struct { - unsigned long seg; -} mm_segment_t; - /* This is dead. Everything has been moved to thread_info. */ struct thread_struct { }; #define INIT_THREAD { } diff --git a/arch/alpha/include/asm/thread_info.h b/arch/alpha/include/asm/thread_info.h index 2592356e3215..fdc485d7787a 100644 --- a/arch/alpha/include/asm/thread_info.h +++ b/arch/alpha/include/asm/thread_info.h @@ -19,7 +19,6 @@ struct thread_info { unsigned int flags; /* low level flags */ unsigned int ieee_state; /* see fpu.h */ - mm_segment_t addr_limit; /* thread address space */ unsigned cpu; /* current CPU */ int preempt_count; /* 0 => preemptable, <0 => BUG */ unsigned int status; /* thread-synchronous flags */ @@ -35,7 +34,6 @@ struct thread_info { #define INIT_THREAD_INFO(tsk) \ { \ .task = &tsk, \ - .addr_limit = KERNEL_DS, \ .preempt_count = INIT_PREEMPT_COUNT, \ } diff --git a/arch/alpha/include/asm/uaccess.h b/arch/alpha/include/asm/uaccess.h index 82c5743fc9cd..c32c2584c0b7 100644 --- a/arch/alpha/include/asm/uaccess.h +++ b/arch/alpha/include/asm/uaccess.h @@ -2,26 +2,7 @@ #ifndef __ALPHA_UACCESS_H #define __ALPHA_UACCESS_H -/* - * The fs value determines whether argument validity checking should be - * performed or not. If get_fs() == USER_DS, checking is performed, with - * get_fs() == KERNEL_DS, checking is bypassed. - * - * Or at least it did once upon a time. Nowadays it is a mask that - * defines which bits of the address space are off limits. This is a - * wee bit faster than the above. - * - * For historical reasons, these macros are grossly misnamed. - */ - -#define KERNEL_DS ((mm_segment_t) { 0UL }) -#define USER_DS ((mm_segment_t) { -0x40000000000UL }) - -#define get_fs() (current_thread_info()->addr_limit) -#define set_fs(x) (current_thread_info()->addr_limit = (x)) - #include - /* * These are the main single-value transfer routines. They automatically * use the right size if we just have the right pointer type. diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig index 3c2a4753d09b..e0a60a27e14d 100644 --- a/arch/arc/Kconfig +++ b/arch/arc/Kconfig @@ -45,7 +45,6 @@ config ARC select PCI_SYSCALL if PCI select PERF_USE_VMALLOC if ARC_CACHE_VIPT_ALIASING select HAVE_ARCH_JUMP_LABEL if ISA_ARCV2 && !CPU_ENDIAN_BE32 - select SET_FS select TRACE_IRQFLAGS_SUPPORT config LOCKDEP_SUPPORT diff --git a/arch/arc/include/asm/segment.h b/arch/arc/include/asm/segment.h deleted file mode 100644 index 871f8ab11bfd..000000000000 --- a/arch/arc/include/asm/segment.h +++ /dev/null @@ -1,20 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-only */ -/* - * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) - */ - -#ifndef __ASMARC_SEGMENT_H -#define __ASMARC_SEGMENT_H - -#ifndef __ASSEMBLY__ - -typedef unsigned long mm_segment_t; - -#define MAKE_MM_SEG(s) ((mm_segment_t) { (s) }) - -#define KERNEL_DS MAKE_MM_SEG(0) -#define USER_DS MAKE_MM_SEG(TASK_SIZE) -#define uaccess_kernel() (get_fs() == KERNEL_DS) - -#endif /* __ASSEMBLY__ */ -#endif /* __ASMARC_SEGMENT_H */ diff --git a/arch/arc/include/asm/thread_info.h b/arch/arc/include/asm/thread_info.h index d36863e34bfc..1e0b2e3914d5 100644 --- a/arch/arc/include/asm/thread_info.h +++ b/arch/arc/include/asm/thread_info.h @@ -27,7 +27,6 @@ #ifndef __ASSEMBLY__ #include -#include /* * low level task data that entry.S needs immediate access to @@ -40,7 +39,6 @@ struct thread_info { unsigned long flags; /* low level flags */ int preempt_count; /* 0 => preemptable, <0 => BUG */ struct task_struct *task; /* main task structure */ - mm_segment_t addr_limit; /* thread address space */ __u32 cpu; /* current CPU */ unsigned long thr_ptr; /* TLS ptr */ }; @@ -56,7 +54,6 @@ struct thread_info { .flags = 0, \ .cpu = 0, \ .preempt_count = INIT_PREEMPT_COUNT, \ - .addr_limit = KERNEL_DS, \ } static inline __attribute_const__ struct thread_info *current_thread_info(void) diff --git a/arch/arc/include/asm/uaccess.h b/arch/arc/include/asm/uaccess.h index 30f80b4be2ab..99712471c96a 100644 --- a/arch/arc/include/asm/uaccess.h +++ b/arch/arc/include/asm/uaccess.h @@ -638,7 +638,6 @@ extern unsigned long arc_clear_user_noinline(void __user *to, #define __clear_user(d, n) arc_clear_user_noinline(d, n) #endif -#include #include #endif diff --git a/arch/csky/Kconfig b/arch/csky/Kconfig index 132f43f12dd8..75ef86605d69 100644 --- a/arch/csky/Kconfig +++ b/arch/csky/Kconfig @@ -79,7 +79,6 @@ config CSKY select PCI_DOMAINS_GENERIC if PCI select PCI_SYSCALL if PCI select PCI_MSI if PCI - select SET_FS select TRACE_IRQFLAGS_SUPPORT config LOCKDEP_SUPPORT diff --git a/arch/csky/include/asm/processor.h b/arch/csky/include/asm/processor.h index 817dd60ff152..688c7548b559 100644 --- a/arch/csky/include/asm/processor.h +++ b/arch/csky/include/asm/processor.h @@ -4,7 +4,6 @@ #define __ASM_CSKY_PROCESSOR_H #include -#include #include #include #include @@ -59,7 +58,6 @@ struct thread_struct { */ #define start_thread(_regs, _pc, _usp) \ do { \ - set_fs(USER_DS); /* reads from user space */ \ (_regs)->pc = (_pc); \ (_regs)->regs[1] = 0; /* ABIV1 is R7, uClibc_main rtdl arg */ \ (_regs)->regs[2] = 0; \ diff --git a/arch/csky/include/asm/segment.h b/arch/csky/include/asm/segment.h deleted file mode 100644 index 5bc1cc62b87f..000000000000 --- a/arch/csky/include/asm/segment.h +++ /dev/null @@ -1,10 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ - -#ifndef __ASM_CSKY_SEGMENT_H -#define __ASM_CSKY_SEGMENT_H - -typedef struct { - unsigned long seg; -} mm_segment_t; - -#endif /* __ASM_CSKY_SEGMENT_H */ diff --git a/arch/csky/include/asm/thread_info.h b/arch/csky/include/asm/thread_info.h index 8c349a8f904d..b5ed788f0c68 100644 --- a/arch/csky/include/asm/thread_info.h +++ b/arch/csky/include/asm/thread_info.h @@ -16,7 +16,6 @@ struct thread_info { unsigned long flags; int preempt_count; unsigned long tp_value; - mm_segment_t addr_limit; struct restart_block restart_block; struct pt_regs *regs; unsigned int cpu; @@ -26,7 +25,6 @@ struct thread_info { { \ .task = &tsk, \ .preempt_count = INIT_PREEMPT_COUNT, \ - .addr_limit = KERNEL_DS, \ .cpu = 0, \ .restart_block = { \ .fn = do_no_restart_syscall, \ diff --git a/arch/csky/include/asm/uaccess.h b/arch/csky/include/asm/uaccess.h index fec8f77ffc99..2e927c21d8a1 100644 --- a/arch/csky/include/asm/uaccess.h +++ b/arch/csky/include/asm/uaccess.h @@ -3,8 +3,6 @@ #ifndef __ASM_CSKY_UACCESS_H #define __ASM_CSKY_UACCESS_H -#define user_addr_max() (current_thread_info()->addr_limit.seg) - /* * __put_user_fn */ @@ -200,7 +198,6 @@ unsigned long raw_copy_to_user(void *to, const void *from, unsigned long n); unsigned long __clear_user(void __user *to, unsigned long n); #define __clear_user __clear_user -#include #include #endif /* __ASM_CSKY_UACCESS_H */ diff --git a/arch/csky/kernel/asm-offsets.c b/arch/csky/kernel/asm-offsets.c index 1cbcba4b0dd1..d1e903579473 100644 --- a/arch/csky/kernel/asm-offsets.c +++ b/arch/csky/kernel/asm-offsets.c @@ -25,7 +25,6 @@ int main(void) /* offsets into the thread_info struct */ DEFINE(TINFO_FLAGS, offsetof(struct thread_info, flags)); DEFINE(TINFO_PREEMPT, offsetof(struct thread_info, preempt_count)); - DEFINE(TINFO_ADDR_LIMIT, offsetof(struct thread_info, addr_limit)); DEFINE(TINFO_TP_VALUE, offsetof(struct thread_info, tp_value)); DEFINE(TINFO_TASK, offsetof(struct thread_info, task)); diff --git a/arch/h8300/Kconfig b/arch/h8300/Kconfig index 3e3e0f16f7e0..fe48c4f26cc8 100644 --- a/arch/h8300/Kconfig +++ b/arch/h8300/Kconfig @@ -24,7 +24,6 @@ config H8300 select HAVE_ARCH_KGDB select HAVE_ARCH_HASH select CPU_NO_EFFICIENT_FFS - select SET_FS select UACCESS_MEMCPY config CPU_BIG_ENDIAN diff --git a/arch/h8300/include/asm/processor.h b/arch/h8300/include/asm/processor.h index 141a23eb62b7..ba171aa4dacb 100644 --- a/arch/h8300/include/asm/processor.h +++ b/arch/h8300/include/asm/processor.h @@ -13,7 +13,6 @@ #define __ASM_H8300_PROCESSOR_H #include -#include #include #include diff --git a/arch/h8300/include/asm/segment.h b/arch/h8300/include/asm/segment.h deleted file mode 100644 index 37950725d9b9..000000000000 --- a/arch/h8300/include/asm/segment.h +++ /dev/null @@ -1,40 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -#ifndef _H8300_SEGMENT_H -#define _H8300_SEGMENT_H - -/* define constants */ -#define USER_DATA (1) -#ifndef __USER_DS -#define __USER_DS (USER_DATA) -#endif -#define USER_PROGRAM (2) -#define SUPER_DATA (3) -#ifndef __KERNEL_DS -#define __KERNEL_DS (SUPER_DATA) -#endif -#define SUPER_PROGRAM (4) - -#ifndef __ASSEMBLY__ - -typedef struct { - unsigned long seg; -} mm_segment_t; - -#define MAKE_MM_SEG(s) ((mm_segment_t) { (s) }) -#define USER_DS MAKE_MM_SEG(__USER_DS) -#define KERNEL_DS MAKE_MM_SEG(__KERNEL_DS) - -/* - * Get/set the SFC/DFC registers for MOVES instructions - */ - -static inline mm_segment_t get_fs(void) -{ - return USER_DS; -} - -#define uaccess_kernel() (get_fs().seg == KERNEL_DS.seg) - -#endif /* __ASSEMBLY__ */ - -#endif /* _H8300_SEGMENT_H */ diff --git a/arch/h8300/include/asm/thread_info.h b/arch/h8300/include/asm/thread_info.h index a518214d4ddd..ff2d873749a4 100644 --- a/arch/h8300/include/asm/thread_info.h +++ b/arch/h8300/include/asm/thread_info.h @@ -10,7 +10,6 @@ #define _ASM_THREAD_INFO_H #include -#include #ifdef __KERNEL__ @@ -31,7 +30,6 @@ struct thread_info { unsigned long flags; /* low level flags */ int cpu; /* cpu we're on */ int preempt_count; /* 0 => preemptable, <0 => BUG */ - mm_segment_t addr_limit; }; /* @@ -43,7 +41,6 @@ struct thread_info { .flags = 0, \ .cpu = 0, \ .preempt_count = INIT_PREEMPT_COUNT, \ - .addr_limit = KERNEL_DS, \ } /* how to get the thread information struct from C */ diff --git a/arch/h8300/kernel/entry.S b/arch/h8300/kernel/entry.S index c6e289b5f1f2..42db87c17917 100644 --- a/arch/h8300/kernel/entry.S +++ b/arch/h8300/kernel/entry.S @@ -17,7 +17,6 @@ #include #include #include -#include #include #include #include diff --git a/arch/h8300/kernel/head_ram.S b/arch/h8300/kernel/head_ram.S index dbf8429f5fab..489462f0ee57 100644 --- a/arch/h8300/kernel/head_ram.S +++ b/arch/h8300/kernel/head_ram.S @@ -4,7 +4,6 @@ #include #include #include -#include #include #include #include diff --git a/arch/h8300/mm/init.c b/arch/h8300/mm/init.c index f7bf4693e3b2..9fa13312720a 100644 --- a/arch/h8300/mm/init.c +++ b/arch/h8300/mm/init.c @@ -34,7 +34,6 @@ #include #include -#include #include #include @@ -71,11 +70,6 @@ void __init paging_init(void) panic("%s: Failed to allocate %lu bytes align=0x%lx\n", __func__, PAGE_SIZE, PAGE_SIZE); - /* - * Set up SFC/DFC registers (user data space). - */ - set_fs(USER_DS); - pr_debug("before free_area_init\n"); pr_debug("free_area_init -> start_mem is %#lx\nvirtual_end is %#lx\n", diff --git a/arch/h8300/mm/memory.c b/arch/h8300/mm/memory.c index 4a60e2b5eb96..c950571064d2 100644 --- a/arch/h8300/mm/memory.c +++ b/arch/h8300/mm/memory.c @@ -24,7 +24,6 @@ #include #include -#include #include #include #include diff --git a/arch/hexagon/Kconfig b/arch/hexagon/Kconfig index 15dd8f38b698..54eadf265178 100644 --- a/arch/hexagon/Kconfig +++ b/arch/hexagon/Kconfig @@ -30,7 +30,6 @@ config HEXAGON select GENERIC_CLOCKEVENTS_BROADCAST select MODULES_USE_ELF_RELA select GENERIC_CPU_DEVICES - select SET_FS select ARCH_WANT_LD_ORPHAN_WARN select TRACE_IRQFLAGS_SUPPORT help diff --git a/arch/hexagon/include/asm/thread_info.h b/arch/hexagon/include/asm/thread_info.h index 535976665bf0..e90f280b9ce3 100644 --- a/arch/hexagon/include/asm/thread_info.h +++ b/arch/hexagon/include/asm/thread_info.h @@ -22,10 +22,6 @@ #ifndef __ASSEMBLY__ -typedef struct { - unsigned long seg; -} mm_segment_t; - /* * This is union'd with the "bottom" of the kernel stack. * It keeps track of thread info which is handy for routines @@ -37,7 +33,6 @@ struct thread_info { unsigned long flags; /* low level flags */ __u32 cpu; /* current cpu */ int preempt_count; /* 0=>preemptible,<0=>BUG */ - mm_segment_t addr_limit; /* segmentation sux */ /* * used for syscalls somehow; * seems to have a function pointer and four arguments @@ -66,7 +61,6 @@ struct thread_info { .flags = 0, \ .cpu = 0, \ .preempt_count = 1, \ - .addr_limit = KERNEL_DS, \ .sp = 0, \ .regs = NULL, \ } diff --git a/arch/hexagon/kernel/process.c b/arch/hexagon/kernel/process.c index 232dfd8956aa..dfa6b2757c05 100644 --- a/arch/hexagon/kernel/process.c +++ b/arch/hexagon/kernel/process.c @@ -105,7 +105,6 @@ int copy_thread(unsigned long clone_flags, unsigned long usp, unsigned long arg, /* * Parent sees new pid -- not necessary, not even possible at * this point in the fork process - * Might also want to set things like ti->addr_limit */ return 0; diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig index 59798e43cdb0..1fb1cec087b7 100644 --- a/arch/microblaze/Kconfig +++ b/arch/microblaze/Kconfig @@ -42,7 +42,6 @@ config MICROBLAZE select CPU_NO_EFFICIENT_FFS select MMU_GATHER_NO_RANGE select SPARSE_IRQ - select SET_FS select ZONE_DMA select TRACE_IRQFLAGS_SUPPORT diff --git a/arch/microblaze/include/asm/thread_info.h b/arch/microblaze/include/asm/thread_info.h index 44f5ca331862..a0ddd2a36fb9 100644 --- a/arch/microblaze/include/asm/thread_info.h +++ b/arch/microblaze/include/asm/thread_info.h @@ -56,17 +56,12 @@ struct cpu_context { __u32 fsr; }; -typedef struct { - unsigned long seg; -} mm_segment_t; - struct thread_info { struct task_struct *task; /* main task structure */ unsigned long flags; /* low level flags */ unsigned long status; /* thread-synchronous flags */ __u32 cpu; /* current CPU */ __s32 preempt_count; /* 0 => preemptable,< 0 => BUG*/ - mm_segment_t addr_limit; /* thread address space */ struct cpu_context cpu_context; }; @@ -80,7 +75,6 @@ struct thread_info { .flags = 0, \ .cpu = 0, \ .preempt_count = INIT_PREEMPT_COUNT, \ - .addr_limit = KERNEL_DS, \ } /* how to get the thread information struct from C */ diff --git a/arch/microblaze/include/asm/uaccess.h b/arch/microblaze/include/asm/uaccess.h index dd82e90adb52..ea0c1f11035f 100644 --- a/arch/microblaze/include/asm/uaccess.h +++ b/arch/microblaze/include/asm/uaccess.h @@ -15,30 +15,6 @@ #include #include #include - -/* - * On Microblaze the fs value is actually the top of the corresponding - * address space. - * - * The fs value determines whether argument validity checking should be - * performed or not. If get_fs() == USER_DS, checking is performed, with - * get_fs() == KERNEL_DS, checking is bypassed. - * - * For historical reasons, these macros are grossly misnamed. - * - * For non-MMU arch like Microblaze, KERNEL_DS and USER_DS is equal. - */ -# define MAKE_MM_SEG(s) ((mm_segment_t) { (s) }) - -# define KERNEL_DS MAKE_MM_SEG(0xFFFFFFFF) -# define USER_DS MAKE_MM_SEG(TASK_SIZE - 1) - -# define get_fs() (current_thread_info()->addr_limit) -# define set_fs(val) (current_thread_info()->addr_limit = (val)) -# define user_addr_max() get_fs().seg - -# define uaccess_kernel() (get_fs().seg == KERNEL_DS.seg) - #include # define __FIXUP_SECTION ".section .fixup,\"ax\"\n" diff --git a/arch/microblaze/kernel/asm-offsets.c b/arch/microblaze/kernel/asm-offsets.c index b77dd188dec4..47ee409508b1 100644 --- a/arch/microblaze/kernel/asm-offsets.c +++ b/arch/microblaze/kernel/asm-offsets.c @@ -86,7 +86,6 @@ int main(int argc, char *argv[]) /* struct thread_info */ DEFINE(TI_TASK, offsetof(struct thread_info, task)); DEFINE(TI_FLAGS, offsetof(struct thread_info, flags)); - DEFINE(TI_ADDR_LIMIT, offsetof(struct thread_info, addr_limit)); DEFINE(TI_CPU_CONTEXT, offsetof(struct thread_info, cpu_context)); DEFINE(TI_PREEMPT_COUNT, offsetof(struct thread_info, preempt_count)); BLANK(); diff --git a/arch/microblaze/kernel/process.c b/arch/microblaze/kernel/process.c index 5e2b91c1e8ce..1b944d319d73 100644 --- a/arch/microblaze/kernel/process.c +++ b/arch/microblaze/kernel/process.c @@ -18,7 +18,6 @@ #include #include #include -#include /* for USER_DS macros */ #include void show_regs(struct pt_regs *regs) diff --git a/arch/nds32/Kconfig b/arch/nds32/Kconfig index 4d1421b18734..013249430fa3 100644 --- a/arch/nds32/Kconfig +++ b/arch/nds32/Kconfig @@ -44,7 +44,6 @@ config NDS32 select HAVE_FUNCTION_GRAPH_TRACER select HAVE_FTRACE_MCOUNT_RECORD select HAVE_DYNAMIC_FTRACE - select SET_FS select TRACE_IRQFLAGS_SUPPORT help Andes(nds32) Linux support. diff --git a/arch/nds32/include/asm/thread_info.h b/arch/nds32/include/asm/thread_info.h index d3967ad184f0..bd8f81cf2ce5 100644 --- a/arch/nds32/include/asm/thread_info.h +++ b/arch/nds32/include/asm/thread_info.h @@ -16,8 +16,6 @@ struct task_struct; #include #include -typedef unsigned long mm_segment_t; - /* * low level task data that entry.S needs immediate access to. * __switch_to() assumes cpu_context follows immediately after cpu_domain. @@ -25,12 +23,10 @@ typedef unsigned long mm_segment_t; struct thread_info { unsigned long flags; /* low level flags */ __s32 preempt_count; /* 0 => preemptable, <0 => bug */ - mm_segment_t addr_limit; /* address limit */ }; #define INIT_THREAD_INFO(tsk) \ { \ .preempt_count = INIT_PREEMPT_COUNT, \ - .addr_limit = KERNEL_DS, \ } #define thread_saved_pc(tsk) ((unsigned long)(tsk->thread.cpu_context.pc)) #define thread_saved_fp(tsk) ((unsigned long)(tsk->thread.cpu_context.fp)) diff --git a/arch/nds32/include/asm/uaccess.h b/arch/nds32/include/asm/uaccess.h index 832d642a4068..377548d4451a 100644 --- a/arch/nds32/include/asm/uaccess.h +++ b/arch/nds32/include/asm/uaccess.h @@ -11,6 +11,7 @@ #include #include #include +#include #define __asmeq(x, y) ".ifnc " x "," y " ; .err ; .endif\n\t" @@ -33,20 +34,6 @@ struct exception_table_entry { extern int fixup_exception(struct pt_regs *regs); -#define KERNEL_DS ((mm_segment_t) { ~0UL }) -#define USER_DS ((mm_segment_t) {TASK_SIZE - 1}) - -#define get_fs() (current_thread_info()->addr_limit) -#define user_addr_max get_fs -#define uaccess_kernel() (get_fs() == KERNEL_DS) - -static inline void set_fs(mm_segment_t fs) -{ - current_thread_info()->addr_limit = fs; -} - -#include - /* * Single-value transfer routines. They automatically use the right * size if we just have the right pointer type. Note that the functions diff --git a/arch/nds32/mm/alignment.c b/arch/nds32/mm/alignment.c index 1eb7ded6992b..9c2c0a454da8 100644 --- a/arch/nds32/mm/alignment.c +++ b/arch/nds32/mm/alignment.c @@ -512,7 +512,6 @@ int do_unaligned_access(unsigned long addr, struct pt_regs *regs) { unsigned long inst; int ret = -EFAULT; - mm_segment_t seg; inst = get_inst(regs->ipc); @@ -520,12 +519,10 @@ int do_unaligned_access(unsigned long addr, struct pt_regs *regs) "Faulting addr: 0x%08lx, pc: 0x%08lx [inst: 0x%08lx ]\n", addr, regs->ipc, inst); - seg = force_uaccess_begin(); if (inst & NDS32_16BIT_INSTRUCTION) ret = do_16((inst >> 16) & 0xffff, regs); else ret = do_32(inst, regs); - force_uaccess_end(seg); return ret; } diff --git a/arch/nios2/Kconfig b/arch/nios2/Kconfig index 33fd06f5fa41..4167f1eb4cd8 100644 --- a/arch/nios2/Kconfig +++ b/arch/nios2/Kconfig @@ -24,7 +24,6 @@ config NIOS2 select USB_ARCH_HAS_HCD if USB_SUPPORT select CPU_NO_EFFICIENT_FFS select MMU_GATHER_NO_RANGE if MMU - select SET_FS config GENERIC_CSUM def_bool y diff --git a/arch/nios2/include/asm/thread_info.h b/arch/nios2/include/asm/thread_info.h index 272d2c72a727..bcc0e9915ebd 100644 --- a/arch/nios2/include/asm/thread_info.h +++ b/arch/nios2/include/asm/thread_info.h @@ -26,10 +26,6 @@ #ifndef __ASSEMBLY__ -typedef struct { - unsigned long seg; -} mm_segment_t; - /* * low level task data that entry.S needs immediate access to * - this struct should fit entirely inside of one cache line @@ -42,10 +38,6 @@ struct thread_info { unsigned long flags; /* low level flags */ __u32 cpu; /* current CPU */ int preempt_count; /* 0 => preemptable,<0 => BUG */ - mm_segment_t addr_limit; /* thread address space: - 0-0x7FFFFFFF for user-thead - 0-0xFFFFFFFF for kernel-thread - */ struct pt_regs *regs; }; @@ -60,7 +52,6 @@ struct thread_info { .flags = 0, \ .cpu = 0, \ .preempt_count = INIT_PREEMPT_COUNT, \ - .addr_limit = KERNEL_DS, \ } /* how to get the thread information struct from C */ diff --git a/arch/nios2/include/asm/uaccess.h b/arch/nios2/include/asm/uaccess.h index 9a7658df7f8d..6d364e459458 100644 --- a/arch/nios2/include/asm/uaccess.h +++ b/arch/nios2/include/asm/uaccess.h @@ -18,18 +18,6 @@ #include #include - -/* - * Segment stuff - */ -#define MAKE_MM_SEG(s) ((mm_segment_t) { (s) }) -#define USER_DS MAKE_MM_SEG(0x80000000UL) -#define KERNEL_DS MAKE_MM_SEG(0) - - -#define get_fs() (current_thread_info()->addr_limit) -#define set_fs(seg) (current_thread_info()->addr_limit = (seg)) - #include # define __EX_TABLE_SECTION ".section __ex_table,\"a\"\n" diff --git a/arch/openrisc/Kconfig b/arch/openrisc/Kconfig index f724b3f1aeed..0d68adf6e02b 100644 --- a/arch/openrisc/Kconfig +++ b/arch/openrisc/Kconfig @@ -36,7 +36,6 @@ config OPENRISC select ARCH_WANT_FRAME_POINTERS select GENERIC_IRQ_MULTI_HANDLER select MMU_GATHER_NO_RANGE if MMU - select SET_FS select TRACE_IRQFLAGS_SUPPORT config CPU_BIG_ENDIAN diff --git a/arch/openrisc/include/asm/thread_info.h b/arch/openrisc/include/asm/thread_info.h index 659834ab87fa..4af3049c34c2 100644 --- a/arch/openrisc/include/asm/thread_info.h +++ b/arch/openrisc/include/asm/thread_info.h @@ -40,18 +40,12 @@ */ #ifndef __ASSEMBLY__ -typedef unsigned long mm_segment_t; - struct thread_info { struct task_struct *task; /* main task structure */ unsigned long flags; /* low level flags */ __u32 cpu; /* current CPU */ __s32 preempt_count; /* 0 => preemptable, <0 => BUG */ - mm_segment_t addr_limit; /* thread address space: - 0-0x7FFFFFFF for user-thead - 0-0xFFFFFFFF for kernel-thread - */ __u8 supervisor_stack[0]; /* saved context data */ @@ -71,7 +65,6 @@ struct thread_info { .flags = 0, \ .cpu = 0, \ .preempt_count = INIT_PREEMPT_COUNT, \ - .addr_limit = KERNEL_DS, \ .ksp = 0, \ } diff --git a/arch/openrisc/include/asm/uaccess.h b/arch/openrisc/include/asm/uaccess.h index 8f049ec99b3e..d6500a374e18 100644 --- a/arch/openrisc/include/asm/uaccess.h +++ b/arch/openrisc/include/asm/uaccess.h @@ -22,29 +22,6 @@ #include #include #include - -/* - * The fs value determines whether argument validity checking should be - * performed or not. If get_fs() == USER_DS, checking is performed, with - * get_fs() == KERNEL_DS, checking is bypassed. - * - * For historical reasons, these macros are grossly misnamed. - */ - -/* addr_limit is the maximum accessible address for the task. we misuse - * the KERNEL_DS and USER_DS values to both assign and compare the - * addr_limit values through the equally misnamed get/set_fs macros. - * (see above) - */ - -#define KERNEL_DS (~0UL) - -#define USER_DS (TASK_SIZE) -#define get_fs() (current_thread_info()->addr_limit) -#define set_fs(x) (current_thread_info()->addr_limit = (x)) - -#define uaccess_kernel() (get_fs() == KERNEL_DS) - #include /* diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig index 1cab1b284f1a..875388835a58 100644 --- a/arch/sparc/Kconfig +++ b/arch/sparc/Kconfig @@ -46,7 +46,6 @@ config SPARC select LOCKDEP_SMALL if LOCKDEP select NEED_DMA_MAP_STATE select NEED_SG_DMA_LENGTH - select SET_FS select TRACE_IRQFLAGS_SUPPORT config SPARC32 @@ -100,6 +99,7 @@ config SPARC64 select HAVE_SETUP_PER_CPU_AREA select NEED_PER_CPU_EMBED_FIRST_CHUNK select NEED_PER_CPU_PAGE_FIRST_CHUNK + select SET_FS config ARCH_PROC_KCORE_TEXT def_bool y diff --git a/arch/sparc/include/asm/processor_32.h b/arch/sparc/include/asm/processor_32.h index 647bf0ac7beb..b26c35336b51 100644 --- a/arch/sparc/include/asm/processor_32.h +++ b/arch/sparc/include/asm/processor_32.h @@ -32,10 +32,6 @@ struct fpq { }; #endif -typedef struct { - int seg; -} mm_segment_t; - /* The Sparc processor specific thread struct. */ struct thread_struct { struct pt_regs *kregs; @@ -50,11 +46,9 @@ struct thread_struct { unsigned long fsr; unsigned long fpqdepth; struct fpq fpqueue[16]; - mm_segment_t current_ds; }; #define INIT_THREAD { \ - .current_ds = KERNEL_DS, \ .kregs = (struct pt_regs *)(init_stack+THREAD_SIZE)-1 \ } diff --git a/arch/sparc/include/asm/uaccess_32.h b/arch/sparc/include/asm/uaccess_32.h index 367747116260..9fd6c53644b6 100644 --- a/arch/sparc/include/asm/uaccess_32.h +++ b/arch/sparc/include/asm/uaccess_32.h @@ -12,19 +12,6 @@ #include #include - -/* Sparc is not segmented, however we need to be able to fool access_ok() - * when doing system calls from kernel mode legitimately. - * - * "For historical reasons, these macros are grossly misnamed." -Linus - */ - -#define KERNEL_DS ((mm_segment_t) { 0 }) -#define USER_DS ((mm_segment_t) { -1 }) - -#define get_fs() (current->thread.current_ds) -#define set_fs(val) ((current->thread.current_ds) = (val)) - #include /* Uh, these should become the main single-value transfer routines.. diff --git a/arch/sparc/kernel/process_32.c b/arch/sparc/kernel/process_32.c index 2dc0bf9fe62e..88c0c14aaff0 100644 --- a/arch/sparc/kernel/process_32.c +++ b/arch/sparc/kernel/process_32.c @@ -300,7 +300,6 @@ int copy_thread(unsigned long clone_flags, unsigned long sp, unsigned long arg, extern int nwindows; unsigned long psr; memset(new_stack, 0, STACKFRAME_SZ + TRACEREG_SZ); - p->thread.current_ds = KERNEL_DS; ti->kpc = (((unsigned long) ret_from_kernel_thread) - 0x8); childregs->u_regs[UREG_G1] = sp; /* function */ childregs->u_regs[UREG_G2] = arg; @@ -311,7 +310,6 @@ int copy_thread(unsigned long clone_flags, unsigned long sp, unsigned long arg, } memcpy(new_stack, (char *)regs - STACKFRAME_SZ, STACKFRAME_SZ + TRACEREG_SZ); childregs->u_regs[UREG_FP] = sp; - p->thread.current_ds = USER_DS; ti->kpc = (((unsigned long) ret_from_fork) - 0x8); ti->kpsr = current->thread.fork_kpsr | PSR_PIL; ti->kwim = current->thread.fork_kwim; diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig index 8ac599aa6d99..09f7616a0b46 100644 --- a/arch/xtensa/Kconfig +++ b/arch/xtensa/Kconfig @@ -40,7 +40,6 @@ config XTENSA select IRQ_DOMAIN select MODULES_USE_ELF_RELA select PERF_USE_VMALLOC - select SET_FS select TRACE_IRQFLAGS_SUPPORT select VIRT_TO_BUS help diff --git a/arch/xtensa/include/asm/asm-uaccess.h b/arch/xtensa/include/asm/asm-uaccess.h index 7f6cf4151843..7cec869136e3 100644 --- a/arch/xtensa/include/asm/asm-uaccess.h +++ b/arch/xtensa/include/asm/asm-uaccess.h @@ -23,76 +23,6 @@ #include #include -/* - * These assembly macros mirror the C macros in asm/uaccess.h. They - * should always have identical functionality. See - * arch/xtensa/kernel/sys.S for usage. - */ - -#define KERNEL_DS 0 -#define USER_DS 1 - -/* - * get_fs reads current->thread.current_ds into a register. - * On Entry: - * anything - * stack - * On Exit: - * contains current->thread.current_ds - */ - .macro get_fs ad, sp - GET_CURRENT(\ad,\sp) -#if THREAD_CURRENT_DS > 1020 - addi \ad, \ad, TASK_THREAD - l32i \ad, \ad, THREAD_CURRENT_DS - TASK_THREAD -#else - l32i \ad, \ad, THREAD_CURRENT_DS -#endif - .endm - -/* - * set_fs sets current->thread.current_ds to some value. - * On Entry: - * anything (temp register) - * value to write - * stack - * On Exit: - * destroyed (actually, current) - * preserved, value to write - */ - .macro set_fs at, av, sp - GET_CURRENT(\at,\sp) - s32i \av, \at, THREAD_CURRENT_DS - .endm - -/* - * kernel_ok determines whether we should bypass addr/size checking. - * See the equivalent C-macro version below for clarity. - * On success, kernel_ok branches to a label indicated by parameter - * . This implies that the macro falls through to the next - * insruction on an error. - * - * Note that while this macro can be used independently, we designed - * in for optimal use in the access_ok macro below (i.e., we fall - * through on error). - * - * On Entry: - * anything (temp register) - * label to branch to on success; implies - * fall-through macro on error - * stack pointer - * On Exit: - * destroyed (actually, current->thread.current_ds) - */ - -#if ((KERNEL_DS != 0) || (USER_DS == 0)) -# error Assembly macro kernel_ok fails -#endif - .macro kernel_ok at, sp, success - get_fs \at, \sp - beqz \at, \success - .endm - /* * user_ok determines whether the access to user-space memory is allowed. * See the equivalent C-macro version below for clarity. @@ -147,7 +77,6 @@ * destroyed */ .macro access_ok aa, as, at, sp, error - kernel_ok \at, \sp, .Laccess_ok_\@ user_ok \aa, \as, \at, \error .Laccess_ok_\@: .endm diff --git a/arch/xtensa/include/asm/processor.h b/arch/xtensa/include/asm/processor.h index 37d3e9887fe7..abad7c3df46f 100644 --- a/arch/xtensa/include/asm/processor.h +++ b/arch/xtensa/include/asm/processor.h @@ -152,18 +152,12 @@ */ #define SPILL_SLOT_CALL12(sp, reg) (*(((unsigned long *)(sp)) - 16 + (reg))) -typedef struct { - unsigned long seg; -} mm_segment_t; - struct thread_struct { /* kernel's return address and stack pointer for context switching */ unsigned long ra; /* kernel's a0: return address and window call size */ unsigned long sp; /* kernel's a1: stack pointer */ - mm_segment_t current_ds; /* see uaccess.h for example uses */ - /* struct xtensa_cpuinfo info; */ unsigned long bad_vaddr; /* last user fault */ @@ -186,7 +180,6 @@ struct thread_struct { { \ ra: 0, \ sp: sizeof(init_stack) + (long) &init_stack, \ - current_ds: {0}, \ /*info: {0}, */ \ bad_vaddr: 0, \ bad_uaddr: 0, \ diff --git a/arch/xtensa/include/asm/thread_info.h b/arch/xtensa/include/asm/thread_info.h index a312333a9add..f6fcbba1d02f 100644 --- a/arch/xtensa/include/asm/thread_info.h +++ b/arch/xtensa/include/asm/thread_info.h @@ -52,8 +52,6 @@ struct thread_info { __u32 cpu; /* current CPU */ __s32 preempt_count; /* 0 => preemptable,< 0 => BUG*/ - mm_segment_t addr_limit; /* thread address space */ - unsigned long cpenable; #if XCHAL_HAVE_EXCLUSIVE /* result of the most recent exclusive store */ @@ -81,7 +79,6 @@ struct thread_info { .flags = 0, \ .cpu = 0, \ .preempt_count = INIT_PREEMPT_COUNT, \ - .addr_limit = KERNEL_DS, \ } /* how to get the thread information struct from C */ diff --git a/arch/xtensa/include/asm/uaccess.h b/arch/xtensa/include/asm/uaccess.h index 0edd9e4b23d0..56aec6d504fe 100644 --- a/arch/xtensa/include/asm/uaccess.h +++ b/arch/xtensa/include/asm/uaccess.h @@ -19,22 +19,6 @@ #include #include #include - -/* - * The fs value determines whether argument validity checking should - * be performed or not. If get_fs() == USER_DS, checking is - * performed, with get_fs() == KERNEL_DS, checking is bypassed. - * - * For historical reasons (Data Segment Register?), these macros are - * grossly misnamed. - */ - -#define KERNEL_DS ((mm_segment_t) { 0 }) -#define USER_DS ((mm_segment_t) { 1 }) - -#define get_fs() (current->thread.current_ds) -#define set_fs(val) (current->thread.current_ds = (val)) - #include /* diff --git a/arch/xtensa/kernel/asm-offsets.c b/arch/xtensa/kernel/asm-offsets.c index dc5c83cad9be..f1fd1390d069 100644 --- a/arch/xtensa/kernel/asm-offsets.c +++ b/arch/xtensa/kernel/asm-offsets.c @@ -87,7 +87,6 @@ int main(void) OFFSET(TI_STSTUS, thread_info, status); OFFSET(TI_CPU, thread_info, cpu); OFFSET(TI_PRE_COUNT, thread_info, preempt_count); - OFFSET(TI_ADDR_LIMIT, thread_info, addr_limit); /* struct thread_info (offset from start_struct) */ DEFINE(THREAD_RA, offsetof (struct task_struct, thread.ra)); @@ -108,8 +107,6 @@ int main(void) #endif DEFINE(THREAD_XTREGS_USER, offsetof (struct thread_info, xtregs_user)); DEFINE(XTREGS_USER_SIZE, sizeof(xtregs_user_t)); - DEFINE(THREAD_CURRENT_DS, offsetof (struct task_struct, \ - thread.current_ds)); /* struct mm_struct */ DEFINE(MM_USERS, offsetof(struct mm_struct, mm_users)); diff --git a/include/asm-generic/uaccess.h b/include/asm-generic/uaccess.h index ebc685dc8d74..a5be9e61a2a2 100644 --- a/include/asm-generic/uaccess.h +++ b/include/asm-generic/uaccess.h @@ -8,6 +8,7 @@ * address space, e.g. all NOMMU machines. */ #include +#include #ifdef CONFIG_UACCESS_MEMCPY #include @@ -94,30 +95,6 @@ raw_copy_to_user(void __user *to, const void *from, unsigned long n) #define INLINE_COPY_TO_USER #endif /* CONFIG_UACCESS_MEMCPY */ -#ifdef CONFIG_SET_FS -#define MAKE_MM_SEG(s) ((mm_segment_t) { (s) }) - -#ifndef KERNEL_DS -#define KERNEL_DS MAKE_MM_SEG(~0UL) -#endif - -#ifndef USER_DS -#define USER_DS MAKE_MM_SEG(TASK_SIZE - 1) -#endif - -#ifndef get_fs -#define get_fs() (current_thread_info()->addr_limit) - -static inline void set_fs(mm_segment_t fs) -{ - current_thread_info()->addr_limit = fs; -} -#endif - -#endif /* CONFIG_SET_FS */ - -#include - /* * These are the main single-value transfer routines. They automatically * use the right size if we just have the right pointer type.