metag: Remove arch/metag/

The earliest Meta architecture port of Linux I have a record of was an
import of a Meta port of Linux v2.4.1 in February 2004, which was worked
on significantly over the next few years by Graham Whaley, Will Newton,
Matt Fleming, myself and others.

Eventually the port was merged into mainline in v3.9 in March 2013, not
long after Imagination Technologies bought MIPS Technologies and shifted
its CPU focus over to the MIPS architecture.

As a result, though the port was maintained for a while, kept on life
support for a while longer, and useful for testing a few specific
drivers for which I don't have ready access to the equivalent MIPS
hardware, it is now essentially dead with no users.

It is also stuck using an out-of-tree toolchain based on GCC 4.2.4 which
is no longer maintained, now struggles to build modern kernels due to
toolchain bugs, and doesn't itself build with a modern GCC. The latest
buildroot port is still using an old uClibc snapshot which is no longer
served, and the latest uClibc doesn't build with GCC 4.2.4.

So lets call it a day and drop the Meta architecture port from the
kernel. RIP Meta.

Signed-off-by: James Hogan <jhogan@kernel.org>
Link: https://lkml.kernel.org/r/95906b76-6ce1-3f84-eaba-c29b4ae952eb@roeck-us.net
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Graham Whaley <graham.whaley@gmail.com>
Cc: linux-metag@vger.kernel.org

1 files changed, 0 insertions, 213 deletions

diff --git a/arch/metag/include/asm/uaccess.h b/arch/metag/include/asm/uaccess.h
deleted file mode 100644
index a5311eb36e32..000000000000
--- a/arch/metag/include/asm/uaccess.h
+++ /dev/null
@@ -1,213 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef __METAG_UACCESS_H
-#define __METAG_UACCESS_H
-
-/*
- * User space memory access functions
- */
-
-/*
- * 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) })
-
-#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))
-
-#define segment_eq(a, b)	((a).seg == (b).seg)
-
-static inline int __access_ok(unsigned long addr, unsigned long size)
-{
-	/*
-	 * Allow access to the user mapped memory area, but not the system area
-	 * before it. The check extends to the top of the address space when
-	 * kernel access is allowed (there's no real reason to user copy to the
-	 * system area in any case).
-	 */
-	if (likely(addr >= META_MEMORY_BASE && addr < get_fs().seg &&
-		   size <= get_fs().seg - addr))
-		return true;
-	/*
-	 * Explicitly allow NULL pointers here. Parts of the kernel such
-	 * as readv/writev use access_ok to validate pointers, but want
-	 * to allow NULL pointers for various reasons. NULL pointers are
-	 * safe to allow through because the first page is not mappable on
-	 * Meta.
-	 */
-	if (!addr)
-		return true;
-	/* Allow access to core code memory area... */
-	if (addr >= LINCORE_CODE_BASE && addr <= LINCORE_CODE_LIMIT &&
-	    size <= LINCORE_CODE_LIMIT + 1 - addr)
-		return true;
-	/* ... but no other areas. */
-	return false;
-}
-
-#define access_ok(type, addr, size) __access_ok((unsigned long)(addr),	\
-						(unsigned long)(size))
-
-#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.
- */
-
-#define put_user(x, ptr) \
-	__put_user_check((__typeof__(*(ptr)))(x), (ptr), sizeof(*(ptr)))
-#define __put_user(x, ptr) \
-	__put_user_nocheck((__typeof__(*(ptr)))(x), (ptr), sizeof(*(ptr)))
-
-extern void __put_user_bad(void);
-
-#define __put_user_nocheck(x, ptr, size)		\
-({                                                      \
-	long __pu_err;                                  \
-	__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);           \
-	if (access_ok(VERIFY_WRITE, __pu_addr, size))		\
-		__put_user_size((x), __pu_addr, (size), __pu_err);	\
-	__pu_err;                                               \
-})
-
-extern long __put_user_asm_b(unsigned int x, void __user *addr);
-extern long __put_user_asm_w(unsigned int x, void __user *addr);
-extern long __put_user_asm_d(unsigned int x, void __user *addr);
-extern long __put_user_asm_l(unsigned long long x, void __user *addr);
-
-#define __put_user_size(x, ptr, size, retval)				\
-do {                                                                    \
-	retval = 0;                                                     \
-	switch (size) {                                                 \
-	case 1:								\
-		retval = __put_user_asm_b((__force unsigned int)x, ptr);\
-		break;							\
-	case 2:								\
-		retval = __put_user_asm_w((__force unsigned int)x, ptr);\
-		break;							\
-	case 4:								\
-		retval = __put_user_asm_d((__force unsigned int)x, ptr);\
-		break;							\
-	case 8:								\
-		retval = __put_user_asm_l((__force unsigned long long)x,\
-					  ptr);				\
-		break;							\
-	default:							\
-		__put_user_bad();					\
-	}								\
-} while (0)
-
-#define get_user(x, ptr) \
-	__get_user_check((x), (ptr), sizeof(*(ptr)))
-#define __get_user(x, ptr) \
-	__get_user_nocheck((x), (ptr), sizeof(*(ptr)))
-
-extern long __get_user_bad(void);
-
-#define __get_user_nocheck(x, ptr, size)			\
-({                                                              \
-	long __gu_err;						\
-	long long __gu_val;					\
-	__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;					\
-	long long __gu_val = 0;						\
-	const __typeof__(*(ptr)) __user *__gu_addr = (ptr);		\
-	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 unsigned char __get_user_asm_b(const void __user *addr, long *err);
-extern unsigned short __get_user_asm_w(const void __user *addr, long *err);
-extern unsigned int __get_user_asm_d(const void __user *addr, long *err);
-extern unsigned long long __get_user_asm_l(const void __user *addr, long *err);
-
-#define __get_user_size(x, ptr, size, retval)			\
-do {                                                            \
-	retval = 0;                                             \
-	switch (size) {                                         \
-	case 1:							\
-		x = __get_user_asm_b(ptr, &retval); break;	\
-	case 2:							\
-		x = __get_user_asm_w(ptr, &retval); break;	\
-	case 4:							\
-		x = __get_user_asm_d(ptr, &retval); break;	\
-	case 8:							\
-		x = __get_user_asm_l(ptr, &retval); break;	\
-	default:						\
-		(x) = __get_user_bad();				\
-	}                                                       \
-} while (0)
-
-/*
- * Copy a null terminated string from userspace.
- *
- * Must return:
- * -EFAULT		for an exception
- * count		if we hit the buffer limit
- * bytes copied		if we hit a null byte
- * (without the null byte)
- */
-
-extern long __must_check __strncpy_from_user(char *dst, const char __user *src,
-					     long count);
-
-static inline long
-strncpy_from_user(char *dst, const char __user *src, long count)
-{
-	if (!access_ok(VERIFY_READ, src, 1))
-		return -EFAULT;
-	return __strncpy_from_user(dst, src, count);
-}
-/*
- * Return the size of a string (including the ending 0)
- *
- * Return 0 on exception, a value greater than N if too long
- */
-extern long __must_check strnlen_user(const char __user *src, long count);
-
-extern unsigned long raw_copy_from_user(void *to, const void __user *from,
-					unsigned long n);
-extern unsigned long raw_copy_to_user(void __user *to, const void *from,
-				      unsigned long n);
-
-/*
- * Zero Userspace
- */
-
-extern unsigned long __must_check __do_clear_user(void __user *to,
-						  unsigned long n);
-
-static inline unsigned long clear_user(void __user *to, unsigned long n)
-{
-	if (access_ok(VERIFY_WRITE, to, n))
-		return __do_clear_user(to, n);
-	return n;
-}
-
-#define __clear_user(to, n)            __do_clear_user(to, n)
-
-#endif /* _METAG_UACCESS_H */