CONFIG_ARCH_HAS_RAW_COPY_USER is unconditional now

all architectures converted Signed-off-by: Al Viro <[email protected]>
opendata26 · Apr 26, 2017 · 701cac6 · 701cac6
1 parent eea86b6
commit 701cac6
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Showing 35 changed files with 3 additions and 83 deletions.
diff --git a/arch/Kconfig b/arch/Kconfig
@@ -847,7 +847,4 @@ config STRICT_MODULE_RWX
 config ARCH_WANT_RELAX_ORDER
 	bool
 
-config ARCH_HAS_RAW_COPY_USER
-	bool
-
 source "kernel/gcov/Kconfig"
diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig
@@ -26,7 +26,6 @@ config ALPHA
 	select ODD_RT_SIGACTION
 	select OLD_SIGSUSPEND
 	select CPU_NO_EFFICIENT_FFS if !ALPHA_EV67
-	select ARCH_HAS_RAW_COPY_USER
 	help
 	  The Alpha is a 64-bit general-purpose processor designed and
 	  marketed by the Digital Equipment Corporation of blessed memory,

diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
@@ -44,7 +44,6 @@ config ARC
 	select HAVE_GENERIC_DMA_COHERENT
 	select HAVE_KERNEL_GZIP
 	select HAVE_KERNEL_LZMA
-	select ARCH_HAS_RAW_COPY_USER
 
 config MIGHT_HAVE_PCI
 	bool

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
@@ -96,7 +96,6 @@ config ARM
 	select PERF_USE_VMALLOC
 	select RTC_LIB
 	select SYS_SUPPORTS_APM_EMULATION
-	select ARCH_HAS_RAW_COPY_USER
 	# Above selects are sorted alphabetically; please add new ones
 	# according to that.  Thanks.
 	help

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
@@ -115,7 +115,6 @@ config ARM64
 	select SPARSE_IRQ
 	select SYSCTL_EXCEPTION_TRACE
 	select THREAD_INFO_IN_TASK
-	select ARCH_HAS_RAW_COPY_USER
 	help
 	  ARM 64-bit (AArch64) Linux support.
 

diff --git a/arch/avr32/Kconfig b/arch/avr32/Kconfig
@@ -19,7 +19,6 @@ config AVR32
 	select HAVE_MOD_ARCH_SPECIFIC
 	select MODULES_USE_ELF_RELA
 	select HAVE_NMI
-	select ARCH_HAS_RAW_COPY_USER
 	help
 	  AVR32 is a high-performance 32-bit RISC microprocessor core,
 	  designed for cost-sensitive embedded applications, with particular

diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig
@@ -41,7 +41,6 @@ config BLACKFIN
 	select MODULES_USE_ELF_RELA
 	select HAVE_DEBUG_STACKOVERFLOW
 	select HAVE_NMI
-	select ARCH_HAS_RAW_COPY_USER
 
 config GENERIC_CSUM
 	def_bool y

diff --git a/arch/c6x/Kconfig b/arch/c6x/Kconfig
@@ -18,7 +18,6 @@ config C6X
 	select GENERIC_CLOCKEVENTS
 	select MODULES_USE_ELF_RELA
 	select ARCH_NO_COHERENT_DMA_MMAP
-	select ARCH_HAS_RAW_COPY_USER
 
 config MMU
 	def_bool n

diff --git a/arch/cris/Kconfig b/arch/cris/Kconfig
@@ -71,7 +71,6 @@ config CRIS
 	select GENERIC_SCHED_CLOCK if ETRAX_ARCH_V32
 	select HAVE_DEBUG_BUGVERBOSE if ETRAX_ARCH_V32
 	select HAVE_NMI
-	select ARCH_HAS_RAW_COPY_USER
 
 config HZ
 	int

diff --git a/arch/frv/Kconfig b/arch/frv/Kconfig
@@ -16,7 +16,6 @@ config FRV
 	select OLD_SIGACTION
 	select HAVE_DEBUG_STACKOVERFLOW
 	select ARCH_NO_COHERENT_DMA_MMAP
-	select ARCH_HAS_RAW_COPY_USER
 
 config ZONE_DMA
 	bool

diff --git a/arch/h8300/Kconfig b/arch/h8300/Kconfig
@@ -22,7 +22,6 @@ config H8300
 	select HAVE_ARCH_KGDB
 	select HAVE_ARCH_HASH
 	select CPU_NO_EFFICIENT_FFS
-	select ARCH_HAS_RAW_COPY_USER
 
 config RWSEM_GENERIC_SPINLOCK
 	def_bool y

diff --git a/arch/hexagon/Kconfig b/arch/hexagon/Kconfig
@@ -26,7 +26,6 @@ config HEXAGON
 	select GENERIC_CLOCKEVENTS_BROADCAST
 	select MODULES_USE_ELF_RELA
 	select GENERIC_CPU_DEVICES
-	select ARCH_HAS_RAW_COPY_USER
 	---help---
 	  Qualcomm Hexagon is a processor architecture designed for high
 	  performance and low power across a wide variety of applications.

diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
@@ -53,7 +53,6 @@ config IA64
 	select ARCH_USE_CMPXCHG_LOCKREF
 	select HAVE_ARCH_AUDITSYSCALL
 	select HAVE_ARCH_HARDENED_USERCOPY
-	select ARCH_HAS_RAW_COPY_USER
 	default y
 	help
 	  The Itanium Processor Family is Intel's 64-bit successor to

diff --git a/arch/m32r/Kconfig b/arch/m32r/Kconfig
@@ -19,7 +19,6 @@ config M32R
 	select HAVE_DEBUG_STACKOVERFLOW
 	select CPU_NO_EFFICIENT_FFS
 	select DMA_NOOP_OPS
-	select ARCH_HAS_RAW_COPY_USER
 
 config SBUS
 	bool

diff --git a/arch/m68k/Kconfig b/arch/m68k/Kconfig
@@ -22,7 +22,6 @@ config M68K
 	select MODULES_USE_ELF_RELA
 	select OLD_SIGSUSPEND3
 	select OLD_SIGACTION
-	select ARCH_HAS_RAW_COPY_USER
 
 config RWSEM_GENERIC_SPINLOCK
 	bool

diff --git a/arch/metag/Kconfig b/arch/metag/Kconfig
@@ -1,6 +1,5 @@
 config METAG
 	def_bool y
-	select ARCH_HAS_RAW_COPY_USER
 	select EMBEDDED
 	select GENERIC_ATOMIC64
 	select GENERIC_CLOCKEVENTS

diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig
@@ -34,7 +34,6 @@ config MICROBLAZE
 	select TRACING_SUPPORT
 	select VIRT_TO_BUS
 	select CPU_NO_EFFICIENT_FFS
-	select ARCH_HAS_RAW_COPY_USER
 
 config SWAP
 	def_bool n

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
@@ -69,7 +69,6 @@ config MIPS
 	select HAVE_EXIT_THREAD
 	select HAVE_REGS_AND_STACK_ACCESS_API
 	select HAVE_ARCH_HARDENED_USERCOPY
-	select ARCH_HAS_RAW_COPY_USER
 
 menu "Machine selection"
 

diff --git a/arch/mn10300/Kconfig b/arch/mn10300/Kconfig
@@ -16,7 +16,6 @@ config MN10300
 	select OLD_SIGACTION
 	select HAVE_DEBUG_STACKOVERFLOW
 	select ARCH_NO_COHERENT_DMA_MMAP
-	select ARCH_HAS_RAW_COPY_USER
 
 config AM33_2
 	def_bool n

diff --git a/arch/nios2/Kconfig b/arch/nios2/Kconfig
@@ -16,7 +16,6 @@ config NIOS2
 	select SPARSE_IRQ
 	select USB_ARCH_HAS_HCD if USB_SUPPORT
 	select CPU_NO_EFFICIENT_FFS
-	select ARCH_HAS_RAW_COPY_USER
 
 config GENERIC_CSUM
 	def_bool y

diff --git a/arch/openrisc/Kconfig b/arch/openrisc/Kconfig
@@ -28,7 +28,6 @@ config OPENRISC
 	select OR1K_PIC
 	select CPU_NO_EFFICIENT_FFS if !OPENRISC_HAVE_INST_FF1
 	select NO_BOOTMEM
-	select ARCH_HAS_RAW_COPY_USER
 
 config MMU
 	def_bool y

diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig
@@ -41,7 +41,6 @@ config PARISC
 	select GENERIC_CLOCKEVENTS
 	select ARCH_NO_COHERENT_DMA_MMAP
 	select CPU_NO_EFFICIENT_FFS
-	select ARCH_HAS_RAW_COPY_USER
 
 	help
 	  The PA-RISC microprocessor is designed by Hewlett-Packard and used

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
@@ -87,7 +87,6 @@ config PPC
 	select ARCH_HAS_DMA_SET_COHERENT_MASK
 	select ARCH_HAS_ELF_RANDOMIZE
 	select ARCH_HAS_GCOV_PROFILE_ALL
-	select ARCH_HAS_RAW_COPY_USER
 	select ARCH_HAS_SCALED_CPUTIME		if VIRT_CPU_ACCOUNTING_NATIVE
 	select ARCH_HAS_SG_CHAIN
 	select ARCH_HAS_TICK_BROADCAST		if GENERIC_CLOCKEVENTS_BROADCAST

diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
@@ -178,7 +178,6 @@ config S390
 	select ARCH_HAS_SCALED_CPUTIME
 	select VIRT_TO_BUS
 	select HAVE_NMI
-	select ARCH_HAS_RAW_COPY_USER
 
 
 config SCHED_OMIT_FRAME_POINTER

diff --git a/arch/score/Kconfig b/arch/score/Kconfig
@@ -15,7 +15,6 @@ config SCORE
 	select MODULES_USE_ELF_REL
 	select CLONE_BACKWARDS
 	select CPU_NO_EFFICIENT_FFS
-	select ARCH_HAS_RAW_COPY_USER
 
 choice
 	prompt "System type"

diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
@@ -48,7 +48,6 @@ config SUPERH
 	select HAVE_ARCH_AUDITSYSCALL
 	select HAVE_FUTEX_CMPXCHG if FUTEX
 	select HAVE_NMI
-	select ARCH_HAS_RAW_COPY_USER
 	help
 	  The SuperH is a RISC processor targeted for use in embedded systems
 	  and consumer electronics; it was also used in the Sega Dreamcast

diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
@@ -45,7 +45,6 @@ config SPARC
 	select HAVE_ARCH_HARDENED_USERCOPY
 	select PROVE_LOCKING_SMALL if PROVE_LOCKING
 	select ARCH_WANT_RELAX_ORDER
-	select ARCH_HAS_RAW_COPY_USER
 
 config SPARC32
 	def_bool !64BIT

diff --git a/arch/tile/Kconfig b/arch/tile/Kconfig
@@ -33,7 +33,6 @@ config TILE
 	select USER_STACKTRACE_SUPPORT
 	select USE_PMC if PERF_EVENTS
 	select VIRT_TO_BUS
-	select ARCH_HAS_RAW_COPY_USER
 
 config MMU
 	def_bool y

diff --git a/arch/um/Kconfig.common b/arch/um/Kconfig.common
@@ -13,7 +13,6 @@ config UML
 	select GENERIC_CLOCKEVENTS
 	select HAVE_GCC_PLUGINS
 	select TTY # Needed for line.c
-	select ARCH_HAS_RAW_COPY_USER
 
 config MMU
 	bool

diff --git a/arch/unicore32/Kconfig b/arch/unicore32/Kconfig
@@ -18,7 +18,6 @@ config UNICORE32
 	select ARCH_WANT_FRAME_POINTERS
 	select GENERIC_IOMAP
 	select MODULES_USE_ELF_REL
-	select ARCH_HAS_RAW_COPY_USER
 	help
 	  UniCore-32 is 32-bit Instruction Set Architecture,
 	  including a series of low-power-consumption RISC chip

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
@@ -175,7 +175,6 @@ config X86
 	select USER_STACKTRACE_SUPPORT
 	select VIRT_TO_BUS
 	select X86_FEATURE_NAMES		if PROC_FS
-	select ARCH_HAS_RAW_COPY_USER
 
 config INSTRUCTION_DECODER
 	def_bool y

diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig
@@ -29,7 +29,6 @@ config XTENSA
 	select NO_BOOTMEM
 	select PERF_USE_VMALLOC
 	select VIRT_TO_BUS
-	select ARCH_HAS_RAW_COPY_USER
 	help
 	  Xtensa processors are 32-bit RISC machines designed by Tensilica
 	  primarily for embedded systems.  These processors are both

diff --git a/include/asm-generic/uaccess.h b/include/asm-generic/uaccess.h
@@ -86,11 +86,7 @@ static inline int __access_ok(unsigned long addr, unsigned long size)
 
 static inline int __put_user_fn(size_t size, void __user *ptr, void *x)
 {
-#ifdef CONFIG_ARCH_HAS_RAW_COPY_USER
 	return unlikely(raw_copy_to_user(ptr, x, size)) ? -EFAULT : 0;
-#else
-	return unlikely(__copy_to_user(ptr, x, size)) ? -EFAULT : 0;
-#endif
 }
 
 #define __put_user_fn(sz, u, k)	__put_user_fn(sz, u, k)
@@ -151,11 +147,7 @@ extern int __put_user_bad(void) __attribute__((noreturn));
 #ifndef __get_user_fn
 static inline int __get_user_fn(size_t size, const void __user *ptr, void *x)
 {
-#ifdef CONFIG_ARCH_HAS_RAW_COPY_USER
 	return unlikely(raw_copy_from_user(x, ptr, size)) ? -EFAULT : 0;
-#else
-	return unlikely(__copy_from_user(x, ptr, size)) ? -EFAULT : 0;
-#endif
 }
 
 #define __get_user_fn(sz, u, k)	__get_user_fn(sz, u, k)
@@ -164,39 +156,6 @@ static inline int __get_user_fn(size_t size, const void __user *ptr, void *x)
 
 extern int __get_user_bad(void) __attribute__((noreturn));
 
-#ifndef CONFIG_ARCH_HAS_RAW_COPY_USER
-
-#ifndef __copy_from_user_inatomic
-#define __copy_from_user_inatomic __copy_from_user
-#endif
-
-#ifndef __copy_to_user_inatomic
-#define __copy_to_user_inatomic __copy_to_user
-#endif
-
-static inline long copy_from_user(void *to,
-		const void __user * from, unsigned long n)
-{
-	unsigned long res = n;
-	might_fault();
-	if (likely(access_ok(VERIFY_READ, from, n)))
-		res = __copy_from_user(to, from, n);
-	if (unlikely(res))
-		memset(to + (n - res), 0, res);
-	return res;
-}
-
-static inline long copy_to_user(void __user *to,
-		const void *from, unsigned long n)
-{
-	might_fault();
-	if (access_ok(VERIFY_WRITE, to, n))
-		return __copy_to_user(to, from, n);
-	else
-		return n;
-}
-#endif
-
 /*
  * Copy a null terminated string from userspace.
  */

diff --git a/include/linux/uaccess.h b/include/linux/uaccess.h
@@ -12,12 +12,10 @@
 
 #include <asm/uaccess.h>
 
-#ifdef CONFIG_ARCH_HAS_RAW_COPY_USER
 /*
  * Architectures should provide two primitives (raw_copy_{to,from}_user())
- * select ARCH_HAS_RAW_COPY_FROM_USER and get rid of their private instances
- * of copy_{to,from}_user() and __copy_{to,from}_user{,_inatomic}().  Once
- * all of them switch, this part of linux/uaccess.h will become unconditional.
+ * and get rid of their private instances of copy_{to,from}_user() and
+ * __copy_{to,from}_user{,_inatomic}().
  *
  * raw_copy_{to,from}_user(to, from, size) should copy up to size bytes and
  * return the amount left to copy.  They should assume that access_ok() has
@@ -196,7 +194,6 @@ copy_in_user(void __user *to, const void *from, unsigned long n)
 	return n;
 }
 #endif
-#endif
 
 static __always_inline void pagefault_disabled_inc(void)
 {

diff --git a/lib/Makefile b/lib/Makefile
@@ -41,7 +41,7 @@ obj-y += bcd.o div64.o sort.o parser.o debug_locks.o random32.o \
 	 gcd.o lcm.o list_sort.o uuid.o flex_array.o iov_iter.o clz_ctz.o \
 	 bsearch.o find_bit.o llist.o memweight.o kfifo.o \
 	 percpu-refcount.o percpu_ida.o rhashtable.o reciprocal_div.o \
-	 once.o refcount.o
+	 once.o refcount.o usercopy.o
 obj-y += string_helpers.o
 obj-$(CONFIG_TEST_STRING_HELPERS) += test-string_helpers.o
 obj-y += hexdump.o
@@ -242,5 +242,3 @@ UBSAN_SANITIZE_ubsan.o := n
 obj-$(CONFIG_SBITMAP) += sbitmap.o
 
 obj-$(CONFIG_PARMAN) += parman.o
-
-obj-$(CONFIG_ARCH_HAS_RAW_COPY_USER) += usercopy.o