Merge tag 'arch-removal' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

Pul removal of obsolete architecture ports from Arnd Bergmann:
 "This removes the entire architecture code for blackfin, cris, frv,
  m32r, metag, mn10300, score, and tile, including the associated device
  drivers.

  I have been working with the (former) maintainers for each one to
  ensure that my interpretation was right and the code is definitely
  unused in mainline kernels. Many had fond memories of working on the
  respective ports to start with and getting them included in upstream,
  but also saw no point in keeping the port alive without any users.

  In the end, it seems that while the eight architectures are extremely
  different, they all suffered the same fate: There was one company in
  charge of an SoC line, a CPU microarchitecture and a software
  ecosystem, which was more costly than licensing newer off-the-shelf
  CPU cores from a third party (typically ARM, MIPS, or RISC-V). It
  seems that all the SoC product lines are still around, but have not
  used the custom CPU architectures for several years at this point. In
  contrast, CPU instruction sets that remain popular and have actively
  maintained kernel ports tend to all be used across multiple licensees.

  [ See the new nds32 port merged in the previous commit for the next
    generation of "one company in charge of an SoC line, a CPU
    microarchitecture and a software ecosystem"   - Linus ]

  The removal came out of a discussion that is now documented at
  https://lwn.net/Articles/748074/. Unlike the original plans, I'm not
  marking any ports as deprecated but remove them all at once after I
  made sure that they are all unused. Some architectures (notably tile,
  mn10300, and blackfin) are still being shipped in products with old
  kernels, but those products will never be updated to newer kernel
  releases.

  After this series, we still have a few architectures without mainline
  gcc support:

   - unicore32 and hexagon both have very outdated gcc releases, but the
     maintainers promised to work on providing something newer. At least
     in case of hexagon, this will only be llvm, not gcc.

   - openrisc, risc-v and nds32 are still in the process of finishing
     their support or getting it added to mainline gcc in the first
     place. They all have patched gcc-7.3 ports that work to some
     degree, but complete upstream support won't happen before gcc-8.1.
     Csky posted their first kernel patch set last week, their situation
     will be similar

  [ Palmer Dabbelt points out that RISC-V support is in mainline gcc
    since gcc-7, although gcc-7.3.0 is the recommended minimum  - Linus ]"

This really says it all:

 2498 files changed, 95 insertions(+), 467668 deletions(-)

* tag 'arch-removal' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: (74 commits)
  MAINTAINERS: UNICORE32: Change email account
  staging: iio: remove iio-trig-bfin-timer driver
  tty: hvc: remove tile driver
  tty: remove bfin_jtag_comm and hvc_bfin_jtag drivers
  serial: remove tile uart driver
  serial: remove m32r_sio driver
  serial: remove blackfin drivers
  serial: remove cris/etrax uart drivers
  usb: Remove Blackfin references in USB support
  usb: isp1362: remove blackfin arch glue
  usb: musb: remove blackfin port
  usb: host: remove tilegx platform glue
  pwm: remove pwm-bfin driver
  i2c: remove bfin-twi driver
  spi: remove blackfin related host drivers
  watchdog: remove bfin_wdt driver
  can: remove bfin_can driver
  mmc: remove bfin_sdh driver
  input: misc: remove blackfin rotary driver
  input: keyboard: remove bf54x driver
  ...

1 files changed, 0 insertions, 515 deletions

diff --git a/arch/m32r/include/asm/uaccess.h b/arch/m32r/include/asm/uaccess.h
deleted file mode 100644
index 9d89bc3d8181..000000000000
--- a/arch/m32r/include/asm/uaccess.h
+++ /dev/null
@@ -1,515 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _ASM_M32R_UACCESS_H
-#define _ASM_M32R_UACCESS_H
-
-/*
- *  linux/include/asm-m32r/uaccess.h
- *
- *  M32R version.
- *    Copyright (C) 2004, 2006  Hirokazu Takata <takata at linux-m32r.org>
- */
-
-/*
- * User space memory access functions
- */
-#include <asm/page.h>
-#include <asm/setup.h>
-#include <linux/prefetch.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.
- *
- * For historical reasons, these macros are grossly misnamed.
- */
-
-#define MAKE_MM_SEG(s)	((mm_segment_t) { (s) })
-
-#ifdef CONFIG_MMU
-
-#define KERNEL_DS	MAKE_MM_SEG(0xFFFFFFFF)
-#define USER_DS		MAKE_MM_SEG(PAGE_OFFSET)
-#define get_ds()	(KERNEL_DS)
-#define get_fs()	(current_thread_info()->addr_limit)
-#define set_fs(x)	(current_thread_info()->addr_limit = (x))
-
-#else /* not CONFIG_MMU */
-
-#define KERNEL_DS	MAKE_MM_SEG(0xFFFFFFFF)
-#define USER_DS		MAKE_MM_SEG(0xFFFFFFFF)
-#define get_ds()	(KERNEL_DS)
-
-static inline mm_segment_t get_fs(void)
-{
-	return USER_DS;
-}
-
-static inline void set_fs(mm_segment_t s)
-{
-}
-
-#endif /* not CONFIG_MMU */
-
-#define segment_eq(a, b)	((a).seg == (b).seg)
-
-#define __addr_ok(addr) \
-	((unsigned long)(addr) < (current_thread_info()->addr_limit.seg))
-
-/*
- * Test whether a block of memory is a valid user space address.
- * Returns 0 if the range is valid, nonzero otherwise.
- *
- * This is equivalent to the following test:
- * (u33)addr + (u33)size >= (u33)current->addr_limit.seg
- *
- * This needs 33-bit arithmetic. We have a carry...
- */
-#define __range_ok(addr, size) ({					\
-	unsigned long flag, roksum; 					\
-	__chk_user_ptr(addr);						\
-	asm ( 								\
-		"	cmpu	%1, %1    ; clear cbit\n"		\
-		"	addx	%1, %3    ; set cbit if overflow\n"	\
-		"	subx	%0, %0\n"				\
-		"	cmpu	%4, %1\n"				\
-		"	subx	%0, %5\n"				\
-		: "=&r" (flag), "=r" (roksum)				\
-		: "1" (addr), "r" ((int)(size)), 			\
-		  "r" (current_thread_info()->addr_limit.seg), "r" (0)	\
-		: "cbit" );						\
-	flag; })
-
-/**
- * access_ok: - Checks if a user space pointer is valid
- * @type: Type of access: %VERIFY_READ or %VERIFY_WRITE.  Note that
- *        %VERIFY_WRITE is a superset of %VERIFY_READ - if it is safe
- *        to write to a block, it is always safe to read from it.
- * @addr: User space pointer to start of block to check
- * @size: Size of block to check
- *
- * Context: User context only. This function may sleep if pagefaults are
- *          enabled.
- *
- * Checks if a pointer to a block of memory in user space is valid.
- *
- * Returns true (nonzero) if the memory block may be valid, false (zero)
- * if it is definitely invalid.
- *
- * Note that, depending on architecture, this function probably just
- * checks that the pointer is in the user space range - after calling
- * this function, memory access functions may still return -EFAULT.
- */
-#ifdef CONFIG_MMU
-#define access_ok(type, addr, size) (likely(__range_ok(addr, size) == 0))
-#else
-static inline int access_ok(int type, const void *addr, unsigned long size)
-{
-	unsigned long val = (unsigned long)addr;
-
-	return ((val >= memory_start) && ((val + size) < memory_end));
-}
-#endif /* CONFIG_MMU */
-
-#include <asm/extable.h>
-
-/*
- * These are the main single-value transfer routines.  They automatically
- * use the right size if we just have the right pointer type.
- *
- * This gets kind of ugly. We want to return _two_ values in "get_user()"
- * and yet we don't want to do any pointers, because that is too much
- * of a performance impact. Thus we have a few rather ugly macros here,
- * and hide all the uglyness from the user.
- *
- * The "__xxx" versions of the user access functions are versions that
- * do not verify the address space, that must have been done previously
- * with a separate "access_ok()" call (this is used when we do multiple
- * accesses to the same area of user memory).
- */
-
-/* Careful: we have to cast the result to the type of the pointer for sign
-   reasons */
-/**
- * get_user: - Get a simple variable from user space.
- * @x:   Variable to store result.
- * @ptr: Source address, in user space.
- *
- * Context: User context only. This function may sleep if pagefaults are
- *          enabled.
- *
- * This macro copies a single simple variable from user space to kernel
- * space.  It supports simple types like char and int, but not larger
- * data types like structures or arrays.
- *
- * @ptr must have pointer-to-simple-variable type, and the result of
- * dereferencing @ptr must be assignable to @x without a cast.
- *
- * Returns zero on success, or -EFAULT on error.
- * On error, the variable @x is set to zero.
- */
-#define get_user(x, ptr)							\
-	__get_user_check((x), (ptr), sizeof(*(ptr)))
-
-/**
- * put_user: - Write a simple value into user space.
- * @x:   Value to copy to user space.
- * @ptr: Destination address, in user space.
- *
- * Context: User context only. This function may sleep if pagefaults are
- *          enabled.
- *
- * This macro copies a single simple value from kernel space to user
- * space.  It supports simple types like char and int, but not larger
- * data types like structures or arrays.
- *
- * @ptr must have pointer-to-simple-variable type, and @x must be assignable
- * to the result of dereferencing @ptr.
- *
- * Returns zero on success, or -EFAULT on error.
- */
-#define put_user(x, ptr)							\
-	__put_user_check((__typeof__(*(ptr)))(x), (ptr), sizeof(*(ptr)))
-
-/**
- * __get_user: - Get a simple variable from user space, with less checking.
- * @x:   Variable to store result.
- * @ptr: Source address, in user space.
- *
- * Context: User context only. This function may sleep if pagefaults are
- *          enabled.
- *
- * This macro copies a single simple variable from user space to kernel
- * space.  It supports simple types like char and int, but not larger
- * data types like structures or arrays.
- *
- * @ptr must have pointer-to-simple-variable type, and the result of
- * dereferencing @ptr must be assignable to @x without a cast.
- *
- * Caller must check the pointer with access_ok() before calling this
- * function.
- *
- * Returns zero on success, or -EFAULT on error.
- * On error, the variable @x is set to zero.
- */
-#define __get_user(x, ptr) \
-	__get_user_nocheck((x), (ptr), sizeof(*(ptr)))
-
-#define __get_user_nocheck(x, ptr, size)				\
-({									\
-	long __gu_err = 0;						\
-	unsigned long __gu_val = 0;					\
-	might_fault();							\
-	__get_user_size(__gu_val, (ptr), (size), __gu_err);		\
-	(x) = (__force __typeof__(*(ptr)))__gu_val;			\
-	__gu_err;							\
-})
-
-#define __get_user_check(x, ptr, size)					\
-({									\
-	long __gu_err = -EFAULT;					\
-	unsigned long __gu_val = 0;					\
-	const __typeof__(*(ptr)) __user *__gu_addr = (ptr);		\
-	might_fault();							\
-	if (access_ok(VERIFY_READ, __gu_addr, size))			\
-		__get_user_size(__gu_val, __gu_addr, (size), __gu_err);	\
-	(x) = (__force __typeof__(*(ptr)))__gu_val;			\
-	__gu_err;							\
-})
-
-extern long __get_user_bad(void);
-
-#define __get_user_size(x, ptr, size, retval)				\
-do {									\
-	retval = 0;							\
-	__chk_user_ptr(ptr);						\
-	switch (size) {							\
-	  case 1: __get_user_asm(x, ptr, retval, "ub"); break;		\
-	  case 2: __get_user_asm(x, ptr, retval, "uh"); break;		\
-	  case 4: __get_user_asm(x, ptr, retval, ""); break;		\
-	  default: (x) = __get_user_bad();				\
-	}								\
-} while (0)
-
-#define __get_user_asm(x, addr, err, itype)				\
-	__asm__ __volatile__(						\
-		"	.fillinsn\n"					\
-		"1:	ld"itype" %1,@%2\n"				\
-		"	.fillinsn\n"					\
-		"2:\n"							\
-		".section .fixup,\"ax\"\n"				\
-		"	.balign 4\n"					\
-		"3:	ldi %0,%3\n"					\
-		"	seth r14,#high(2b)\n"				\
-		"	or3 r14,r14,#low(2b)\n"				\
-		"	jmp r14\n"					\
-		".previous\n"						\
-		".section __ex_table,\"a\"\n"				\
-		"	.balign 4\n"					\
-		"	.long 1b,3b\n"					\
-		".previous"						\
-		: "=&r" (err), "=&r" (x)				\
-		: "r" (addr), "i" (-EFAULT), "0" (err)			\
-		: "r14", "memory")
-
-/**
- * __put_user: - Write a simple value into user space, with less checking.
- * @x:   Value to copy to user space.
- * @ptr: Destination address, in user space.
- *
- * Context: User context only. This function may sleep if pagefaults are
- *          enabled.
- *
- * This macro copies a single simple value from kernel space to user
- * space.  It supports simple types like char and int, but not larger
- * data types like structures or arrays.
- *
- * @ptr must have pointer-to-simple-variable type, and @x must be assignable
- * to the result of dereferencing @ptr.
- *
- * Caller must check the pointer with access_ok() before calling this
- * function.
- *
- * Returns zero on success, or -EFAULT on error.
- */
-#define __put_user(x, ptr) \
-	__put_user_nocheck((__typeof__(*(ptr)))(x), (ptr), sizeof(*(ptr)))
-
-
-#define __put_user_nocheck(x, ptr, size)				\
-({									\
-	long __pu_err;							\
-	might_fault();							\
-	__put_user_size((x), (ptr), (size), __pu_err);			\
-	__pu_err;							\
-})
-
-
-#define __put_user_check(x, ptr, size)					\
-({									\
-	long __pu_err = -EFAULT;					\
-	__typeof__(*(ptr)) __user *__pu_addr = (ptr);			\
-	might_fault();							\
-	if (access_ok(VERIFY_WRITE, __pu_addr, size))			\
-		__put_user_size((x), __pu_addr, (size), __pu_err);	\
-	__pu_err;							\
-})
-
-#if defined(__LITTLE_ENDIAN__)
-#define __put_user_u64(x, addr, err)					\
-        __asm__ __volatile__(						\
-                "       .fillinsn\n"					\
-                "1:     st %L1,@%2\n"					\
-                "       .fillinsn\n"					\
-                "2:     st %H1,@(4,%2)\n"				\
-                "       .fillinsn\n"					\
-                "3:\n"							\
-                ".section .fixup,\"ax\"\n"				\
-                "       .balign 4\n"					\
-                "4:     ldi %0,%3\n"					\
-                "       seth r14,#high(3b)\n"				\
-                "       or3 r14,r14,#low(3b)\n"				\
-                "       jmp r14\n"					\
-                ".previous\n"						\
-                ".section __ex_table,\"a\"\n"				\
-                "       .balign 4\n"					\
-                "       .long 1b,4b\n"					\
-                "       .long 2b,4b\n"					\
-                ".previous"						\
-                : "=&r" (err)						\
-                : "r" (x), "r" (addr), "i" (-EFAULT), "0" (err)		\
-                : "r14", "memory")
-
-#elif defined(__BIG_ENDIAN__)
-#define __put_user_u64(x, addr, err)					\
-	__asm__ __volatile__(						\
-		"	.fillinsn\n"					\
-		"1:	st %H1,@%2\n"					\
-		"	.fillinsn\n"					\
-		"2:	st %L1,@(4,%2)\n"				\
-		"	.fillinsn\n"					\
-		"3:\n"							\
-		".section .fixup,\"ax\"\n"				\
-		"	.balign 4\n"					\
-		"4:	ldi %0,%3\n"					\
-		"	seth r14,#high(3b)\n"				\
-		"	or3 r14,r14,#low(3b)\n"				\
-		"	jmp r14\n"					\
-		".previous\n"						\
-		".section __ex_table,\"a\"\n"				\
-		"	.balign 4\n"					\
-		"	.long 1b,4b\n"					\
-		"	.long 2b,4b\n"					\
-		".previous"						\
-		: "=&r" (err)						\
-		: "r" (x), "r" (addr), "i" (-EFAULT), "0" (err)		\
-		: "r14", "memory")
-#else
-#error no endian defined
-#endif
-
-extern void __put_user_bad(void);
-
-#define __put_user_size(x, ptr, size, retval)				\
-do {									\
-	retval = 0;							\
-	__chk_user_ptr(ptr);						\
-	switch (size) {							\
-	  case 1: __put_user_asm(x, ptr, retval, "b"); break;		\
-	  case 2: __put_user_asm(x, ptr, retval, "h"); break;		\
-	  case 4: __put_user_asm(x, ptr, retval, ""); break;		\
-	  case 8: __put_user_u64((__typeof__(*ptr))(x), ptr, retval); break;\
-	  default: __put_user_bad();					\
-	}								\
-} while (0)
-
-struct __large_struct { unsigned long buf[100]; };
-#define __m(x) (*(struct __large_struct *)(x))
-
-/*
- * Tell gcc we read from memory instead of writing: this is because
- * we do not write to any memory gcc knows about, so there are no
- * aliasing issues.
- */
-#define __put_user_asm(x, addr, err, itype)				\
-	__asm__ __volatile__(						\
-		"	.fillinsn\n"					\
-		"1:	st"itype" %1,@%2\n"				\
-		"	.fillinsn\n"					\
-		"2:\n"							\
-		".section .fixup,\"ax\"\n"				\
-		"	.balign 4\n"					\
-		"3:	ldi %0,%3\n"					\
-		"	seth r14,#high(2b)\n"				\
-		"	or3 r14,r14,#low(2b)\n"				\
-		"	jmp r14\n"					\
-		".previous\n"						\
-		".section __ex_table,\"a\"\n"				\
-		"	.balign 4\n"					\
-		"	.long 1b,3b\n"					\
-		".previous"						\
-		: "=&r" (err)						\
-		: "r" (x), "r" (addr), "i" (-EFAULT), "0" (err)		\
-		: "r14", "memory")
-
-/*
- * Here we special-case 1, 2 and 4-byte copy_*_user invocations.  On a fault
- * we return the initial request size (1, 2 or 4), as copy_*_user should do.
- * If a store crosses a page boundary and gets a fault, the m32r will not write
- * anything, so this is accurate.
- */
-
-/*
- * Copy To/From Userspace
- */
-
-/* Generic arbitrary sized copy.  */
-/* Return the number of bytes NOT copied.  */
-#define __copy_user(to, from, size)					\
-do {									\
-	unsigned long __dst, __src, __c;				\
-	__asm__ __volatile__ (						\
-		"	mv	r14, %0\n"				\
-		"	or	r14, %1\n"				\
-		"	beq	%0, %1, 9f\n"				\
-		"	beqz	%2, 9f\n"				\
-		"	and3	r14, r14, #3\n"				\
-		"	bnez	r14, 2f\n"				\
-		"	and3	%2, %2, #3\n"				\
-		"	beqz	%3, 2f\n"				\
-		"	addi	%0, #-4		; word_copy \n"		\
-		"	.fillinsn\n"					\
-		"0:	ld	r14, @%1+\n"				\
-		"	addi	%3, #-1\n"				\
-		"	.fillinsn\n"					\
-		"1:	st	r14, @+%0\n"				\
-		"	bnez	%3, 0b\n"				\
-		"	beqz	%2, 9f\n"				\
-		"	addi	%0, #4\n"				\
-		"	.fillinsn\n"					\
-		"2:	ldb	r14, @%1	; byte_copy \n"		\
-		"	.fillinsn\n"					\
-		"3:	stb	r14, @%0\n"				\
-		"	addi	%1, #1\n"				\
-		"	addi	%2, #-1\n"				\
-		"	addi	%0, #1\n"				\
-		"	bnez	%2, 2b\n"				\
-		"	.fillinsn\n"					\
-		"9:\n"							\
-		".section .fixup,\"ax\"\n"				\
-		"	.balign 4\n"					\
-		"5:	addi	%3, #1\n"				\
-		"	addi	%1, #-4\n"				\
-		"	.fillinsn\n"					\
-		"6:	slli	%3, #2\n"				\
-		"	add	%2, %3\n"				\
-		"	addi	%0, #4\n"				\
-		"	.fillinsn\n"					\
-		"7:	seth	r14, #high(9b)\n"			\
-		"	or3	r14, r14, #low(9b)\n"			\
-		"	jmp	r14\n"					\
-		".previous\n"						\
-		".section __ex_table,\"a\"\n"				\
-		"	.balign 4\n"					\
-		"	.long 0b,6b\n"					\
-		"	.long 1b,5b\n"					\
-		"	.long 2b,9b\n"					\
-		"	.long 3b,9b\n"					\
-		".previous\n"						\
-		: "=&r" (__dst), "=&r" (__src), "=&r" (size),		\
-		  "=&r" (__c)						\
-		: "0" (to), "1" (from), "2" (size), "3" (size / 4)	\
-		: "r14", "memory");					\
-} while (0)
-
-/* We let the __ versions of copy_from/to_user inline, because they're often
- * used in fast paths and have only a small space overhead.
- */
-static inline unsigned long
-raw_copy_from_user(void *to, const void __user *from, unsigned long n)
-{
-	prefetchw(to);
-	__copy_user(to, from, n);
-	return n;
-}
-
-static inline unsigned long
-raw_copy_to_user(void __user *to, const void *from, unsigned long n)
-{
-	prefetch(from);
-	__copy_user(to, from, n);
-	return n;
-}
-
-long __must_check strncpy_from_user(char *dst, const char __user *src,
-				long count);
-
-/**
- * __clear_user: - Zero a block of memory in user space, with less checking.
- * @to:   Destination address, in user space.
- * @n:    Number of bytes to zero.
- *
- * Zero a block of memory in user space.  Caller must check
- * the specified block with access_ok() before calling this function.
- *
- * Returns number of bytes that could not be cleared.
- * On success, this will be zero.
- */
-unsigned long __clear_user(void __user *mem, unsigned long len);
-
-/**
- * clear_user: - Zero a block of memory in user space.
- * @to:   Destination address, in user space.
- * @n:    Number of bytes to zero.
- *
- * Zero a block of memory in user space.  Caller must check
- * the specified block with access_ok() before calling this function.
- *
- * Returns number of bytes that could not be cleared.
- * On success, this will be zero.
- */
-unsigned long clear_user(void __user *mem, unsigned long len);
-
-long strnlen_user(const char __user *str, long n);
-
-#endif /* _ASM_M32R_UACCESS_H */