Merge branch 'linus' into perfcounters/core

Merge reason: This brach was on -rc1, refresh it to almost-rc4 to pick up
              the latest upstream fixes.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 321 insertions, 0 deletions

diff --git a/arch/frv/include/asm/uaccess.h b/arch/frv/include/asm/uaccess.h
new file mode 100644
index 00000000000..53650c958f4
--- /dev/null
+++ b/arch/frv/include/asm/uaccess.h
@@ -0,0 +1,321 @@
+/* uaccess.h: userspace accessor functions
+ *
+ * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#ifndef _ASM_UACCESS_H
+#define _ASM_UACCESS_H
+
+/*
+ * User space memory access functions
+ */
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <asm/segment.h>
+#include <asm/sections.h>
+
+#define HAVE_ARCH_UNMAPPED_AREA	/* we decide where to put mmaps */
+
+#define __ptr(x) ((unsigned long __force *)(x))
+
+#define VERIFY_READ	0
+#define VERIFY_WRITE	1
+
+#define __addr_ok(addr) ((unsigned long)(addr) < get_addr_limit())
+
+/*
+ * check that a range of addresses falls within the current address limit
+ */
+static inline int ___range_ok(unsigned long addr, unsigned long size)
+{
+#ifdef CONFIG_MMU
+	int flag = -EFAULT, tmp;
+
+	asm volatile (
+		"	addcc	%3,%2,%1,icc0	\n"	/* set C-flag if addr+size>4GB */
+		"	subcc.p	%1,%4,gr0,icc1	\n"	/* jump if addr+size>limit */
+		"	bc	icc0,#0,0f	\n"
+		"	bhi	icc1,#0,0f	\n"
+		"	setlos	#0,%0		\n"	/* mark okay */
+		"0:				\n"
+		: "=r"(flag), "=&r"(tmp)
+		: "r"(addr), "r"(size), "r"(get_addr_limit()), "0"(flag)
+		);
+
+	return flag;
+
+#else
+
+	if (addr < memory_start ||
+	    addr > memory_end ||
+	    size > memory_end - memory_start ||
+	    addr + size > memory_end)
+		return -EFAULT;
+
+	return 0;
+#endif
+}
+
+#define __range_ok(addr,size) ___range_ok((unsigned long) (addr), (unsigned long) (size))
+
+#define access_ok(type,addr,size) (__range_ok((void __user *)(addr), (size)) == 0)
+#define __access_ok(addr,size) (__range_ok((addr), (size)) == 0)
+
+/*
+ * The exception table consists of pairs of addresses: the first is the
+ * address of an instruction that is allowed to fault, and the second is
+ * the address at which the program should continue.  No registers are
+ * modified, so it is entirely up to the continuation code to figure out
+ * what to do.
+ *
+ * All the routines below use bits of fixup code that are out of line
+ * with the main instruction path.  This means when everything is well,
+ * we don't even have to jump over them.  Further, they do not intrude
+ * on our cache or tlb entries.
+ */
+struct exception_table_entry
+{
+	unsigned long insn, fixup;
+};
+
+/* Returns 0 if exception not found and fixup otherwise.  */
+extern unsigned long search_exception_table(unsigned long);
+
+
+/*
+ * 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)						\
+({									\
+	int __pu_err = 0;						\
+									\
+	typeof(*(ptr)) __pu_val = (x);					\
+	__chk_user_ptr(ptr);						\
+									\
+	switch (sizeof (*(ptr))) {					\
+	case 1:								\
+		__put_user_asm(__pu_err, __pu_val, ptr, "b", "r");	\
+		break;							\
+	case 2:								\
+		__put_user_asm(__pu_err, __pu_val, ptr, "h", "r");	\
+		break;							\
+	case 4:								\
+		__put_user_asm(__pu_err, __pu_val, ptr, "",  "r");	\
+		break;							\
+	case 8:								\
+		__put_user_asm(__pu_err, __pu_val, ptr, "d", "e");	\
+		break;							\
+	default:							\
+		__pu_err = __put_user_bad();				\
+		break;							\
+	}								\
+	__pu_err;							\
+})
+
+#define put_user(x, ptr)			\
+({						\
+	typeof(*(ptr)) __user *_p = (ptr);	\
+	int _e;					\
+						\
+	_e = __range_ok(_p, sizeof(*_p));	\
+	if (_e == 0)				\
+		_e = __put_user((x), _p);	\
+	_e;					\
+})
+
+extern int __put_user_bad(void);
+
+/*
+ * 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.
+ */
+
+#ifdef CONFIG_MMU
+
+#define __put_user_asm(err,x,ptr,dsize,constraint)					\
+do {											\
+	asm volatile("1:	st"dsize"%I1	%2,%M1	\n"				\
+		     "2:				\n"				\
+		     ".subsection 2			\n"				\
+		     "3:	setlos		%3,%0	\n"				\
+		     "		bra		2b	\n"				\
+		     ".previous				\n"				\
+		     ".section __ex_table,\"a\"		\n"				\
+		     "		.balign		8	\n"				\
+		     "		.long		1b,3b	\n"				\
+		     ".previous"							\
+		     : "=r" (err)							\
+		     : "m" (*__ptr(ptr)), constraint (x), "i"(-EFAULT), "0"(err)	\
+		     : "memory");							\
+} while (0)
+
+#else
+
+#define __put_user_asm(err,x,ptr,bwl,con)	\
+do {						\
+	asm("	st"bwl"%I0	%1,%M0	\n"	\
+	    "	membar			\n"	\
+	    :					\
+	    : "m" (*__ptr(ptr)), con (x)	\
+	    : "memory");			\
+} while (0)
+
+#endif
+
+/*****************************************************************************/
+/*
+ *
+ */
+#define __get_user(x, ptr)						\
+({									\
+	int __gu_err = 0;						\
+	__chk_user_ptr(ptr);						\
+									\
+	switch (sizeof(*(ptr))) {					\
+	case 1: {							\
+		unsigned char __gu_val;					\
+		__get_user_asm(__gu_err, __gu_val, ptr, "ub", "=r");	\
+		(x) = *(__force __typeof__(*(ptr)) *) &__gu_val;	\
+		break;							\
+	}								\
+	case 2: {							\
+		unsigned short __gu_val;				\
+		__get_user_asm(__gu_err, __gu_val, ptr, "uh", "=r");	\
+		(x) = *(__force __typeof__(*(ptr)) *) &__gu_val;	\
+		break;							\
+	}								\
+	case 4: {							\
+		unsigned int __gu_val;					\
+		__get_user_asm(__gu_err, __gu_val, ptr, "", "=r");	\
+		(x) = *(__force __typeof__(*(ptr)) *) &__gu_val;	\
+		break;							\
+	}								\
+	case 8: {							\
+		unsigned long long __gu_val;				\
+		__get_user_asm(__gu_err, __gu_val, ptr, "d", "=e");	\
+		(x) = *(__force __typeof__(*(ptr)) *) &__gu_val;	\
+		break;							\
+	}								\
+	default:							\
+		__gu_err = __get_user_bad();				\
+		break;							\
+	}								\
+	__gu_err;							\
+})
+
+#define get_user(x, ptr)			\
+({						\
+	const typeof(*(ptr)) __user *_p = (ptr);\
+	int _e;					\
+						\
+	_e = __range_ok(_p, sizeof(*_p));	\
+	if (likely(_e == 0))			\
+		_e = __get_user((x), _p);	\
+	else					\
+		(x) = (typeof(x)) 0;		\
+	_e;					\
+})
+
+extern int __get_user_bad(void);
+
+#ifdef CONFIG_MMU
+
+#define __get_user_asm(err,x,ptr,dtype,constraint)	\
+do {							\
+	asm("1:		ld"dtype"%I2	%M2,%1	\n"	\
+	    "2:					\n"	\
+	    ".subsection 2			\n"	\
+	    "3:		setlos		%3,%0	\n"	\
+	    "		setlos		#0,%1	\n"	\
+	    "		bra		2b	\n"	\
+	    ".previous				\n"	\
+	    ".section __ex_table,\"a\"		\n"	\
+	    "		.balign		8	\n"	\
+	    "		.long		1b,3b	\n"	\
+	    ".previous"					\
+	    : "=r" (err), constraint (x)		\
+	    : "m" (*__ptr(ptr)), "i"(-EFAULT), "0"(err)	\
+	    );						\
+} while(0)
+
+#else
+
+#define __get_user_asm(err,x,ptr,bwl,con)	\
+	asm("	ld"bwl"%I1	%M1,%0	\n"	\
+	    "	membar			\n"	\
+	    : con(x)				\
+	    : "m" (*__ptr(ptr)))
+
+#endif
+
+/*****************************************************************************/
+/*
+ *
+ */
+#define ____force(x) (__force void *)(void __user *)(x)
+#ifdef CONFIG_MMU
+extern long __memset_user(void *dst, unsigned long count);
+extern long __memcpy_user(void *dst, const void *src, unsigned long count);
+
+#define clear_user(dst,count)			__memset_user(____force(dst), (count))
+#define __copy_from_user_inatomic(to, from, n)	__memcpy_user((to), ____force(from), (n))
+#define __copy_to_user_inatomic(to, from, n)	__memcpy_user(____force(to), (from), (n))
+
+#else
+
+#define clear_user(dst,count)			(memset(____force(dst), 0, (count)), 0)
+#define __copy_from_user_inatomic(to, from, n)	(memcpy((to), ____force(from), (n)), 0)
+#define __copy_to_user_inatomic(to, from, n)	(memcpy(____force(to), (from), (n)), 0)
+
+#endif
+
+#define __clear_user clear_user
+
+static inline unsigned long __must_check
+__copy_to_user(void __user *to, const void *from, unsigned long n)
+{
+       might_sleep();
+       return __copy_to_user_inatomic(to, from, n);
+}
+
+static inline unsigned long
+__copy_from_user(void *to, const void __user *from, unsigned long n)
+{
+       might_sleep();
+       return __copy_from_user_inatomic(to, from, n);
+}
+
+static inline long copy_from_user(void *to, const void __user *from, unsigned long n)
+{
+	unsigned long ret = n;
+
+	if (likely(__access_ok(from, n)))
+		ret = __copy_from_user(to, from, n);
+
+	if (unlikely(ret != 0))
+		memset(to + (n - ret), 0, ret);
+
+	return ret;
+}
+
+static inline long copy_to_user(void __user *to, const void *from, unsigned long n)
+{
+	return likely(__access_ok(to, n)) ? __copy_to_user(to, from, n) : n;
+}
+
+extern long strncpy_from_user(char *dst, const char __user *src, long count);
+extern long strnlen_user(const char __user *src, long count);
+
+#define strlen_user(str) strnlen_user(str, 32767)
+
+extern unsigned long search_exception_table(unsigned long addr);
+
+#endif /* _ASM_UACCESS_H */