From 737d42f75e943fd884ad13acb6d3ee3aff3dcd30 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Tue, 23 Apr 2019 18:38:06 +0200 Subject: asm-generic: don't include from is an odd x86 legacy that we shouldn't force on other architectures. arc used it to bring in mm_context_t, but we can do that inside the arc code easily. Signed-off-by: Christoph Hellwig Signed-off-by: Arnd Bergmann --- arch/arc/include/asm/uaccess.h | 1 + 1 file changed, 1 insertion(+) (limited to 'arch') diff --git a/arch/arc/include/asm/uaccess.h b/arch/arc/include/asm/uaccess.h index eabc3efa6c6d..526418543379 100644 --- a/arch/arc/include/asm/uaccess.h +++ b/arch/arc/include/asm/uaccess.h @@ -742,6 +742,7 @@ extern long arc_strnlen_user_noinline(const char __user *src, long n); #endif +#include #include #endif -- cgit v1.2.3 From c67fdc1f00cba9de86c30f5a01eff21d3ea66c8f Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Tue, 23 Apr 2019 18:38:07 +0200 Subject: arch: mostly remove A few architectures use internally, but nothing in common code does. Remove all the empty or almost empty versions of it, including the asm-generic one. Signed-off-by: Christoph Hellwig Signed-off-by: Arnd Bergmann --- arch/alpha/include/asm/segment.h | 6 ------ arch/alpha/kernel/smc37c669.c | 1 - arch/alpha/kernel/smc37c93x.c | 1 - arch/arm/include/asm/Kbuild | 1 - arch/arm64/include/asm/Kbuild | 1 - arch/c6x/include/asm/Kbuild | 1 - arch/hexagon/include/asm/Kbuild | 1 - arch/hexagon/include/asm/uaccess.h | 1 - arch/ia64/include/asm/segment.h | 6 ------ arch/mips/include/asm/Kbuild | 1 - arch/nds32/include/asm/Kbuild | 1 - arch/nios2/include/asm/Kbuild | 1 - arch/openrisc/include/asm/Kbuild | 1 - arch/openrisc/kernel/ptrace.c | 1 - arch/openrisc/kernel/setup.c | 1 - arch/openrisc/kernel/traps.c | 1 - arch/openrisc/mm/init.c | 1 - arch/openrisc/mm/tlb.c | 1 - arch/parisc/include/asm/Kbuild | 1 - arch/s390/include/asm/segment.h | 5 ----- arch/s390/kernel/ptrace.c | 1 - arch/unicore32/include/asm/Kbuild | 1 - arch/xtensa/include/asm/segment.h | 16 ---------------- include/asm-generic/segment.h | 9 --------- 24 files changed, 61 deletions(-) delete mode 100644 arch/alpha/include/asm/segment.h delete mode 100644 arch/ia64/include/asm/segment.h delete mode 100644 arch/s390/include/asm/segment.h delete mode 100644 arch/xtensa/include/asm/segment.h delete mode 100644 include/asm-generic/segment.h (limited to 'arch') diff --git a/arch/alpha/include/asm/segment.h b/arch/alpha/include/asm/segment.h deleted file mode 100644 index 0453d97daae7..000000000000 --- a/arch/alpha/include/asm/segment.h +++ /dev/null @@ -1,6 +0,0 @@ -#ifndef __ALPHA_SEGMENT_H -#define __ALPHA_SEGMENT_H - -/* Only here because we have some old header files that expect it.. */ - -#endif diff --git a/arch/alpha/kernel/smc37c669.c b/arch/alpha/kernel/smc37c669.c index 4dbd4e415041..bbbd34586de0 100644 --- a/arch/alpha/kernel/smc37c669.c +++ b/arch/alpha/kernel/smc37c669.c @@ -10,7 +10,6 @@ #include #include -#include #if 0 # define DBG_DEVS(args) printk args diff --git a/arch/alpha/kernel/smc37c93x.c b/arch/alpha/kernel/smc37c93x.c index 733f08966fd2..71cd7aca38ce 100644 --- a/arch/alpha/kernel/smc37c93x.c +++ b/arch/alpha/kernel/smc37c93x.c @@ -11,7 +11,6 @@ #include #include -#include #define SMC_DEBUG 0 diff --git a/arch/arm/include/asm/Kbuild b/arch/arm/include/asm/Kbuild index a8a4eb7f6dae..1465d4609929 100644 --- a/arch/arm/include/asm/Kbuild +++ b/arch/arm/include/asm/Kbuild @@ -14,7 +14,6 @@ generic-y += parport.h generic-y += preempt.h generic-y += rwsem.h generic-y += seccomp.h -generic-y += segment.h generic-y += serial.h generic-y += simd.h generic-y += sizes.h diff --git a/arch/arm64/include/asm/Kbuild b/arch/arm64/include/asm/Kbuild index 1e17ea5c372b..fd9574e8f31c 100644 --- a/arch/arm64/include/asm/Kbuild +++ b/arch/arm64/include/asm/Kbuild @@ -17,7 +17,6 @@ generic-y += msi.h generic-y += qrwlock.h generic-y += qspinlock.h generic-y += rwsem.h -generic-y += segment.h generic-y += serial.h generic-y += set_memory.h generic-y += sizes.h diff --git a/arch/c6x/include/asm/Kbuild b/arch/c6x/include/asm/Kbuild index 63b4a1705182..220fcca26f0e 100644 --- a/arch/c6x/include/asm/Kbuild +++ b/arch/c6x/include/asm/Kbuild @@ -28,7 +28,6 @@ generic-y += pci.h generic-y += percpu.h generic-y += pgalloc.h generic-y += preempt.h -generic-y += segment.h generic-y += serial.h generic-y += shmparam.h generic-y += tlbflush.h diff --git a/arch/hexagon/include/asm/Kbuild b/arch/hexagon/include/asm/Kbuild index b25fd42aa0f4..75658fea8bfc 100644 --- a/arch/hexagon/include/asm/Kbuild +++ b/arch/hexagon/include/asm/Kbuild @@ -28,7 +28,6 @@ generic-y += percpu.h generic-y += preempt.h generic-y += rwsem.h generic-y += sections.h -generic-y += segment.h generic-y += serial.h generic-y += shmparam.h generic-y += sizes.h diff --git a/arch/hexagon/include/asm/uaccess.h b/arch/hexagon/include/asm/uaccess.h index a30e58d5f351..7a34092e8b58 100644 --- a/arch/hexagon/include/asm/uaccess.h +++ b/arch/hexagon/include/asm/uaccess.h @@ -24,7 +24,6 @@ * User space memory access functions */ #include -#include #include /* diff --git a/arch/ia64/include/asm/segment.h b/arch/ia64/include/asm/segment.h deleted file mode 100644 index b89e2b3d648f..000000000000 --- a/arch/ia64/include/asm/segment.h +++ /dev/null @@ -1,6 +0,0 @@ -#ifndef _ASM_IA64_SEGMENT_H -#define _ASM_IA64_SEGMENT_H - -/* Only here because we have some old header files that expect it.. */ - -#endif /* _ASM_IA64_SEGMENT_H */ diff --git a/arch/mips/include/asm/Kbuild b/arch/mips/include/asm/Kbuild index 87b86cdf126a..a03cd4e24f37 100644 --- a/arch/mips/include/asm/Kbuild +++ b/arch/mips/include/asm/Kbuild @@ -19,7 +19,6 @@ generic-y += preempt.h generic-y += qrwlock.h generic-y += qspinlock.h generic-y += sections.h -generic-y += segment.h generic-y += trace_clock.h generic-y += unaligned.h generic-y += user.h diff --git a/arch/nds32/include/asm/Kbuild b/arch/nds32/include/asm/Kbuild index 64ceff7ab99b..668d3094921f 100644 --- a/arch/nds32/include/asm/Kbuild +++ b/arch/nds32/include/asm/Kbuild @@ -36,7 +36,6 @@ generic-y += pci.h generic-y += percpu.h generic-y += preempt.h generic-y += sections.h -generic-y += segment.h generic-y += serial.h generic-y += sizes.h generic-y += switch_to.h diff --git a/arch/nios2/include/asm/Kbuild b/arch/nios2/include/asm/Kbuild index 8fde4fa2c34f..0b982dc585ff 100644 --- a/arch/nios2/include/asm/Kbuild +++ b/arch/nios2/include/asm/Kbuild @@ -31,7 +31,6 @@ generic-y += pci.h generic-y += percpu.h generic-y += preempt.h generic-y += sections.h -generic-y += segment.h generic-y += serial.h generic-y += spinlock.h generic-y += topology.h diff --git a/arch/openrisc/include/asm/Kbuild b/arch/openrisc/include/asm/Kbuild index 5a73e2956ac4..08b1c3d2dbbb 100644 --- a/arch/openrisc/include/asm/Kbuild +++ b/arch/openrisc/include/asm/Kbuild @@ -32,7 +32,6 @@ generic-y += qspinlock.h generic-y += qrwlock_types.h generic-y += qrwlock.h generic-y += sections.h -generic-y += segment.h generic-y += shmparam.h generic-y += switch_to.h generic-y += topology.h diff --git a/arch/openrisc/kernel/ptrace.c b/arch/openrisc/kernel/ptrace.c index eb97a8e7c8aa..e8fb2a764f46 100644 --- a/arch/openrisc/kernel/ptrace.c +++ b/arch/openrisc/kernel/ptrace.c @@ -30,7 +30,6 @@ #include #include -#include #include #include diff --git a/arch/openrisc/kernel/setup.c b/arch/openrisc/kernel/setup.c index c605bdad1746..17c00d06d91b 100644 --- a/arch/openrisc/kernel/setup.c +++ b/arch/openrisc/kernel/setup.c @@ -39,7 +39,6 @@ #include #include -#include #include #include #include diff --git a/arch/openrisc/kernel/traps.c b/arch/openrisc/kernel/traps.c index d8981cbb852a..6ed7293ef007 100644 --- a/arch/openrisc/kernel/traps.c +++ b/arch/openrisc/kernel/traps.c @@ -35,7 +35,6 @@ #include #include -#include #include #include #include diff --git a/arch/openrisc/mm/init.c b/arch/openrisc/mm/init.c index caeb4184e8a6..e8a640c7e74c 100644 --- a/arch/openrisc/mm/init.c +++ b/arch/openrisc/mm/init.c @@ -32,7 +32,6 @@ #include /* for initrd_* */ #include -#include #include #include #include diff --git a/arch/openrisc/mm/tlb.c b/arch/openrisc/mm/tlb.c index 6c253a2e86bc..7f9f50161dfe 100644 --- a/arch/openrisc/mm/tlb.c +++ b/arch/openrisc/mm/tlb.c @@ -26,7 +26,6 @@ #include #include -#include #include #include #include diff --git a/arch/parisc/include/asm/Kbuild b/arch/parisc/include/asm/Kbuild index 6f49e77d82a2..d19f49cb0add 100644 --- a/arch/parisc/include/asm/Kbuild +++ b/arch/parisc/include/asm/Kbuild @@ -18,7 +18,6 @@ generic-y += mm-arch-hooks.h generic-y += percpu.h generic-y += preempt.h generic-y += seccomp.h -generic-y += segment.h generic-y += trace_clock.h generic-y += user.h generic-y += vga.h diff --git a/arch/s390/include/asm/segment.h b/arch/s390/include/asm/segment.h deleted file mode 100644 index 97a0582b8d0f..000000000000 --- a/arch/s390/include/asm/segment.h +++ /dev/null @@ -1,5 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -#ifndef _ASM_SEGMENT_H -#define _ASM_SEGMENT_H - -#endif diff --git a/arch/s390/kernel/ptrace.c b/arch/s390/kernel/ptrace.c index cd3df5514552..ad71132374f0 100644 --- a/arch/s390/kernel/ptrace.c +++ b/arch/s390/kernel/ptrace.c @@ -24,7 +24,6 @@ #include #include #include -#include #include #include #include diff --git a/arch/unicore32/include/asm/Kbuild b/arch/unicore32/include/asm/Kbuild index 1d1544b6ca74..a6e4e06caa0a 100644 --- a/arch/unicore32/include/asm/Kbuild +++ b/arch/unicore32/include/asm/Kbuild @@ -26,7 +26,6 @@ generic-y += parport.h generic-y += percpu.h generic-y += preempt.h generic-y += sections.h -generic-y += segment.h generic-y += serial.h generic-y += shmparam.h generic-y += sizes.h diff --git a/arch/xtensa/include/asm/segment.h b/arch/xtensa/include/asm/segment.h deleted file mode 100644 index 98964ad15ca2..000000000000 --- a/arch/xtensa/include/asm/segment.h +++ /dev/null @@ -1,16 +0,0 @@ -/* - * include/asm-xtensa/segment.h - * - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - * - * Copyright (C) 2001 - 2005 Tensilica Inc. - */ - -#ifndef _XTENSA_SEGMENT_H -#define _XTENSA_SEGMENT_H - -#include - -#endif /* _XTENSA_SEGEMENT_H */ diff --git a/include/asm-generic/segment.h b/include/asm-generic/segment.h deleted file mode 100644 index 5580eace622c..000000000000 --- a/include/asm-generic/segment.h +++ /dev/null @@ -1,9 +0,0 @@ -#ifndef __ASM_GENERIC_SEGMENT_H -#define __ASM_GENERIC_SEGMENT_H -/* - * Only here because we have some old header files that expect it... - * - * New architectures probably don't want to have their own version. - */ - -#endif /* __ASM_GENERIC_SEGMENT_H */ -- cgit v1.2.3 From bd79f94758c011bdffd8d4afcfb578d169cb5e93 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Tue, 23 Apr 2019 18:38:08 +0200 Subject: asm-generic: provide entirely generic nommu uaccess Move the code to implement uaccess using memcpy or direct loads and stores to asm-generic/uaccess.h and make it selectable kconfig option. Signed-off-by: Christoph Hellwig Signed-off-by: Arnd Bergmann --- arch/h8300/Kconfig | 1 + arch/h8300/include/asm/Kbuild | 1 + arch/h8300/include/asm/uaccess.h | 55 ---------------------------------------- include/asm-generic/uaccess.h | 48 +++++++++++++++++++++++++++++++++++ lib/Kconfig | 4 +++ 5 files changed, 54 insertions(+), 55 deletions(-) delete mode 100644 arch/h8300/include/asm/uaccess.h (limited to 'arch') diff --git a/arch/h8300/Kconfig b/arch/h8300/Kconfig index c071da34e081..c24d36241503 100644 --- a/arch/h8300/Kconfig +++ b/arch/h8300/Kconfig @@ -23,6 +23,7 @@ config H8300 select HAVE_ARCH_KGDB select HAVE_ARCH_HASH select CPU_NO_EFFICIENT_FFS + select UACCESS_MEMCPY config CPU_BIG_ENDIAN def_bool y diff --git a/arch/h8300/include/asm/Kbuild b/arch/h8300/include/asm/Kbuild index 3e7c8ecf151e..988533f02e4a 100644 --- a/arch/h8300/include/asm/Kbuild +++ b/arch/h8300/include/asm/Kbuild @@ -46,6 +46,7 @@ generic-y += timex.h generic-y += tlbflush.h generic-y += topology.h generic-y += trace_clock.h +generic-y += uaccess.h generic-y += unaligned.h generic-y += vga.h generic-y += word-at-a-time.h diff --git a/arch/h8300/include/asm/uaccess.h b/arch/h8300/include/asm/uaccess.h deleted file mode 100644 index bc8031949d07..000000000000 --- a/arch/h8300/include/asm/uaccess.h +++ /dev/null @@ -1,55 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -#ifndef _ASM_UACCESS_H -#define _ASM_UACCESS_H - -#include - -static inline __must_check unsigned long -raw_copy_from_user(void *to, const void __user * from, unsigned long n) -{ - if (__builtin_constant_p(n)) { - switch(n) { - case 1: - *(u8 *)to = *(u8 __force *)from; - return 0; - case 2: - *(u16 *)to = *(u16 __force *)from; - return 0; - case 4: - *(u32 *)to = *(u32 __force *)from; - return 0; - } - } - - memcpy(to, (const void __force *)from, n); - return 0; -} - -static inline __must_check unsigned long -raw_copy_to_user(void __user *to, const void *from, unsigned long n) -{ - if (__builtin_constant_p(n)) { - switch(n) { - case 1: - *(u8 __force *)to = *(u8 *)from; - return 0; - case 2: - *(u16 __force *)to = *(u16 *)from; - return 0; - case 4: - *(u32 __force *)to = *(u32 *)from; - return 0; - default: - break; - } - } - - memcpy((void __force *)to, from, n); - return 0; -} -#define INLINE_COPY_FROM_USER -#define INLINE_COPY_TO_USER - -#include - -#endif diff --git a/include/asm-generic/uaccess.h b/include/asm-generic/uaccess.h index aac336831204..3dcabfceb21e 100644 --- a/include/asm-generic/uaccess.h +++ b/include/asm-generic/uaccess.h @@ -9,6 +9,54 @@ */ #include +#ifdef CONFIG_UACCESS_MEMCPY +static inline __must_check unsigned long +raw_copy_from_user(void *to, const void __user * from, unsigned long n) +{ + if (__builtin_constant_p(n)) { + switch(n) { + case 1: + *(u8 *)to = *(u8 __force *)from; + return 0; + case 2: + *(u16 *)to = *(u16 __force *)from; + return 0; + case 4: + *(u32 *)to = *(u32 __force *)from; + return 0; + } + } + + memcpy(to, (const void __force *)from, n); + return 0; +} + +static inline __must_check unsigned long +raw_copy_to_user(void __user *to, const void *from, unsigned long n) +{ + if (__builtin_constant_p(n)) { + switch(n) { + case 1: + *(u8 __force *)to = *(u8 *)from; + return 0; + case 2: + *(u16 __force *)to = *(u16 *)from; + return 0; + case 4: + *(u32 __force *)to = *(u32 *)from; + return 0; + default: + break; + } + } + + memcpy((void __force *)to, from, n); + return 0; +} +#define INLINE_COPY_FROM_USER +#define INLINE_COPY_TO_USER +#endif /* CONFIG_UACCESS_MEMCPY */ + #define MAKE_MM_SEG(s) ((mm_segment_t) { (s) }) #ifndef KERNEL_DS diff --git a/lib/Kconfig b/lib/Kconfig index a9e56539bd11..7a3f01ac45e8 100644 --- a/lib/Kconfig +++ b/lib/Kconfig @@ -591,6 +591,10 @@ config ARCH_NO_SG_CHAIN config ARCH_HAS_PMEM_API bool +# use memcpy to implement user copies for nommu architectures +config UACCESS_MEMCPY + bool + config ARCH_HAS_UACCESS_FLUSHCACHE bool -- cgit v1.2.3