arch/s390/include/asm/bitops.h - pub/scm/linux/kernel/git/jes/staging - Git at Google

 /*
  *    Copyright IBM Corp. 1999,2013
  *
  *    Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>,
  *
  * The description below was taken in large parts from the powerpc
  * bitops header file:
  * Within a word, bits are numbered LSB first.  Lot's of places make
  * this assumption by directly testing bits with (val & (1<<nr)).
  * This can cause confusion for large (> 1 word) bitmaps on a
  * big-endian system because, unlike little endian, the number of each
  * bit depends on the word size.
  *
  * The bitop functions are defined to work on unsigned longs, so for an
  * s390x system the bits end up numbered:
  *   |63..............0|127............64|191...........128|255...........192|
  * and on s390:
  *   |31.....0|63....32|95....64|127...96|159..128|191..160|223..192|255..224|
  *
  * There are a few little-endian macros used mostly for filesystem
  * bitmaps, these work on similar bit arrays layouts, but
  * byte-oriented:
  *   |7...0|15...8|23...16|31...24|39...32|47...40|55...48|63...56|
  *
  * The main difference is that bit 3-5 (64b) or 3-4 (32b) in the bit
  * number field needs to be reversed compared to the big-endian bit
  * fields. This can be achieved by XOR with 0x38 (64b) or 0x18 (32b).
  *
  * We also have special functions which work with an MSB0 encoding:
  * on an s390x system the bits are numbered:
  *   |0..............63|64............127|128...........191|192...........255|
  * and on s390:
  *   |0.....31|32....63|64....95|96...127|128..159|160..191|192..223|224..255|
  *
  * The main difference is that bit 0-63 (64b) or 0-31 (32b) in the bit
  * number field needs to be reversed compared to the LSB0 encoded bit
  * fields. This can be achieved by XOR with 0x3f (64b) or 0x1f (32b).
  *
  */

 #ifndef _S390_BITOPS_H
 #define _S390_BITOPS_H

 #ifndef _LINUX_BITOPS_H
 #error only <linux/bitops.h> can be included directly
 #endif

 #include <linux/typecheck.h>
 #include <linux/compiler.h>

 #ifndef CONFIG_64BIT

 #define __BITOPS_OR		"or"
 #define __BITOPS_AND		"nr"
 #define __BITOPS_XOR		"xr"

 #define __BITOPS_LOOP(__addr, __val, __op_string)		\
 ({								\
 	unsigned long __old, __new;				\
 								\
 	typecheck(unsigned long *, (__addr));			\
 	asm volatile(						\
 		"	l	%0,%2\n"			\
 		"0:	lr	%1,%0\n"			\
 		__op_string "	%1,%3\n"			\
 		"	cs	%0,%1,%2\n"			\
 		"	jl	0b"				\
 		: "=&d" (__old), "=&d" (__new), "+Q" (*(__addr))\
 		: "d" (__val)					\
 		: "cc");					\
 	__old;							\
 })

 #else /* CONFIG_64BIT */

 #ifdef CONFIG_HAVE_MARCH_Z196_FEATURES

 #define __BITOPS_OR		"laog"
 #define __BITOPS_AND		"lang"
 #define __BITOPS_XOR		"laxg"

 #define __BITOPS_LOOP(__addr, __val, __op_string)		\
 ({								\
 	unsigned long __old;					\
 								\
 	typecheck(unsigned long *, (__addr));			\
 	asm volatile(						\
 		__op_string "	%0,%2,%1\n"			\
 		: "=d" (__old),	"+Q" (*(__addr))		\
 		: "d" (__val)					\
 		: "cc");					\
 	__old;							\
 })

 #else /* CONFIG_HAVE_MARCH_Z196_FEATURES */

 #define __BITOPS_OR		"ogr"
 #define __BITOPS_AND		"ngr"
 #define __BITOPS_XOR		"xgr"

 #define __BITOPS_LOOP(__addr, __val, __op_string)		\
 ({								\
 	unsigned long __old, __new;				\
 								\
 	typecheck(unsigned long *, (__addr));			\
 	asm volatile(						\
 		"	lg	%0,%2\n"			\
 		"0:	lgr	%1,%0\n"			\
 		__op_string "	%1,%3\n"			\
 		"	csg	%0,%1,%2\n"			\
 		"	jl	0b"				\
 		: "=&d" (__old), "=&d" (__new), "+Q" (*(__addr))\
 		: "d" (__val)					\
 		: "cc");					\
 	__old;							\
 })

 #endif /* CONFIG_HAVE_MARCH_Z196_FEATURES */

 #endif /* CONFIG_64BIT */

 #define __BITOPS_WORDS(bits) (((bits) + BITS_PER_LONG - 1) / BITS_PER_LONG)

 static inline unsigned long *
 __bitops_word(unsigned long nr, volatile unsigned long *ptr)
 {
 	unsigned long addr;

 	addr = (unsigned long)ptr + ((nr ^ (nr & (BITS_PER_LONG - 1))) >> 3);
 	return (unsigned long *)addr;
 }

 static inline unsigned char *
 __bitops_byte(unsigned long nr, volatile unsigned long *ptr)
 {
 	return ((unsigned char *)ptr) + ((nr ^ (BITS_PER_LONG - 8)) >> 3);
 }

 static inline void set_bit(unsigned long nr, volatile unsigned long *ptr)
 {
 	unsigned long *addr = __bitops_word(nr, ptr);
 	unsigned long mask;

 #ifdef CONFIG_HAVE_MARCH_ZEC12_FEATURES
 	if (__builtin_constant_p(nr)) {
 		unsigned char *caddr = __bitops_byte(nr, ptr);

 		asm volatile(
 			"oi	%0,%b1\n"
 			: "+Q" (*caddr)
 			: "i" (1 << (nr & 7))
 			: "cc");
 		return;
 	}
 #endif
 	mask = 1UL << (nr & (BITS_PER_LONG - 1));
 	__BITOPS_LOOP(addr, mask, __BITOPS_OR);
 }

 static inline void clear_bit(unsigned long nr, volatile unsigned long *ptr)
 {
 	unsigned long *addr = __bitops_word(nr, ptr);
 	unsigned long mask;

 #ifdef CONFIG_HAVE_MARCH_ZEC12_FEATURES
 	if (__builtin_constant_p(nr)) {
 		unsigned char *caddr = __bitops_byte(nr, ptr);

 		asm volatile(
 			"ni	%0,%b1\n"
 			: "+Q" (*caddr)
 			: "i" (~(1 << (nr & 7)))
 			: "cc");
 		return;
 	}
 #endif
 	mask = ~(1UL << (nr & (BITS_PER_LONG - 1)));
 	__BITOPS_LOOP(addr, mask, __BITOPS_AND);
 }

 static inline void change_bit(unsigned long nr, volatile unsigned long *ptr)
 {
 	unsigned long *addr = __bitops_word(nr, ptr);
 	unsigned long mask;

 #ifdef CONFIG_HAVE_MARCH_ZEC12_FEATURES
 	if (__builtin_constant_p(nr)) {
 		unsigned char *caddr = __bitops_byte(nr, ptr);

 		asm volatile(
 			"xi	%0,%b1\n"
 			: "+Q" (*caddr)
 			: "i" (1 << (nr & 7))
 			: "cc");
 		return;
 	}
 #endif
 	mask = 1UL << (nr & (BITS_PER_LONG - 1));
 	__BITOPS_LOOP(addr, mask, __BITOPS_XOR);
 }

 static inline int
 test_and_set_bit(unsigned long nr, volatile unsigned long *ptr)
 {
 	unsigned long *addr = __bitops_word(nr, ptr);
 	unsigned long old, mask;

 	mask = 1UL << (nr & (BITS_PER_LONG - 1));
 	old = __BITOPS_LOOP(addr, mask, __BITOPS_OR);
 	barrier();
 	return (old & mask) != 0;
 }

 static inline int
 test_and_clear_bit(unsigned long nr, volatile unsigned long *ptr)
 {
 	unsigned long *addr = __bitops_word(nr, ptr);
 	unsigned long old, mask;

 	mask = ~(1UL << (nr & (BITS_PER_LONG - 1)));
 	old = __BITOPS_LOOP(addr, mask, __BITOPS_AND);
 	barrier();
 	return (old & ~mask) != 0;
 }

 static inline int
 test_and_change_bit(unsigned long nr, volatile unsigned long *ptr)
 {
 	unsigned long *addr = __bitops_word(nr, ptr);
 	unsigned long old, mask;

 	mask = 1UL << (nr & (BITS_PER_LONG - 1));
 	old = __BITOPS_LOOP(addr, mask, __BITOPS_XOR);
 	barrier();
 	return (old & mask) != 0;
 }

 static inline void __set_bit(unsigned long nr, volatile unsigned long *ptr)
 {
 	unsigned char *addr = __bitops_byte(nr, ptr);

 	*addr |= 1 << (nr & 7);
 }

 static inline void
 __clear_bit(unsigned long nr, volatile unsigned long *ptr)
 {
 	unsigned char *addr = __bitops_byte(nr, ptr);

 	*addr &= ~(1 << (nr & 7));
 }

 static inline void __change_bit(unsigned long nr, volatile unsigned long *ptr)
 {
 	unsigned char *addr = __bitops_byte(nr, ptr);

 	*addr ^= 1 << (nr & 7);
 }

 static inline int
 __test_and_set_bit(unsigned long nr, volatile unsigned long *ptr)
 {
 	unsigned char *addr = __bitops_byte(nr, ptr);
 	unsigned char ch;

 	ch = *addr;
 	*addr |= 1 << (nr & 7);
 	return (ch >> (nr & 7)) & 1;
 }

 static inline int
 __test_and_clear_bit(unsigned long nr, volatile unsigned long *ptr)
 {
 	unsigned char *addr = __bitops_byte(nr, ptr);
 	unsigned char ch;

 	ch = *addr;
 	*addr &= ~(1 << (nr & 7));
 	return (ch >> (nr & 7)) & 1;
 }

 static inline int
 __test_and_change_bit(unsigned long nr, volatile unsigned long *ptr)
 {
 	unsigned char *addr = __bitops_byte(nr, ptr);
 	unsigned char ch;

 	ch = *addr;
 	*addr ^= 1 << (nr & 7);
 	return (ch >> (nr & 7)) & 1;
 }

 static inline int test_bit(unsigned long nr, const volatile unsigned long *ptr)
 {
 	const volatile unsigned char *addr;

 	addr = ((const volatile unsigned char *)ptr);
 	addr += (nr ^ (BITS_PER_LONG - 8)) >> 3;
 	return (*addr >> (nr & 7)) & 1;
 }

 /*
  * Functions which use MSB0 bit numbering.
  * On an s390x system the bits are numbered:
  *   |0..............63|64............127|128...........191|192...........255|
  * and on s390:
  *   |0.....31|32....63|64....95|96...127|128..159|160..191|192..223|224..255|
  */
 unsigned long find_first_bit_inv(const unsigned long *addr, unsigned long size);
 unsigned long find_next_bit_inv(const unsigned long *addr, unsigned long size,
 				unsigned long offset);

 static inline void set_bit_inv(unsigned long nr, volatile unsigned long *ptr)
 {
 	return set_bit(nr ^ (BITS_PER_LONG - 1), ptr);
 }

 static inline void clear_bit_inv(unsigned long nr, volatile unsigned long *ptr)
 {
 	return clear_bit(nr ^ (BITS_PER_LONG - 1), ptr);
 }

 static inline void __set_bit_inv(unsigned long nr, volatile unsigned long *ptr)
 {
 	return __set_bit(nr ^ (BITS_PER_LONG - 1), ptr);
 }

 static inline void __clear_bit_inv(unsigned long nr, volatile unsigned long *ptr)
 {
 	return __clear_bit(nr ^ (BITS_PER_LONG - 1), ptr);
 }

 static inline int test_bit_inv(unsigned long nr,
 			       const volatile unsigned long *ptr)
 {
 	return test_bit(nr ^ (BITS_PER_LONG - 1), ptr);
 }

 #ifdef CONFIG_HAVE_MARCH_Z9_109_FEATURES

 /**
  * __flogr - find leftmost one
  * @word - The word to search
  *
  * Returns the bit number of the most significant bit set,
  * where the most significant bit has bit number 0.
  * If no bit is set this function returns 64.
  */
 static inline unsigned char __flogr(unsigned long word)
 {
 	if (__builtin_constant_p(word)) {
 		unsigned long bit = 0;

 		if (!word)
 			return 64;
 		if (!(word & 0xffffffff00000000UL)) {
 			word <<= 32;
 			bit += 32;
 		}
 		if (!(word & 0xffff000000000000UL)) {
 			word <<= 16;
 			bit += 16;
 		}
 		if (!(word & 0xff00000000000000UL)) {
 			word <<= 8;
 			bit += 8;
 		}
 		if (!(word & 0xf000000000000000UL)) {
 			word <<= 4;
 			bit += 4;
 		}
 		if (!(word & 0xc000000000000000UL)) {
 			word <<= 2;
 			bit += 2;
 		}
 		if (!(word & 0x8000000000000000UL)) {
 			word <<= 1;
 			bit += 1;
 		}
 		return bit;
 	} else {
 		register unsigned long bit asm("4") = word;
 		register unsigned long out asm("5");

 		asm volatile(
 			"       flogr   %[bit],%[bit]\n"
 			: [bit] "+d" (bit), [out] "=d" (out) : : "cc");
 		return bit;
 	}
 }

 /**
  * __ffs - find first bit in word.
  * @word: The word to search
  *
  * Undefined if no bit exists, so code should check against 0 first.
  */
 static inline unsigned long __ffs(unsigned long word)
 {
 	return __flogr(-word & word) ^ (BITS_PER_LONG - 1);
 }

 /**
  * ffs - find first bit set
  * @word: the word to search
  *
  * This is defined the same way as the libc and
  * compiler builtin ffs routines (man ffs).
  */
 static inline int ffs(int word)
 {
 	unsigned long mask = 2 * BITS_PER_LONG - 1;
 	unsigned int val = (unsigned int)word;

 	return (1 + (__flogr(-val & val) ^ (BITS_PER_LONG - 1))) & mask;
 }

 /**
  * __fls - find last (most-significant) set bit in a long word
  * @word: the word to search
  *
  * Undefined if no set bit exists, so code should check against 0 first.
  */
 static inline unsigned long __fls(unsigned long word)
 {
 	return __flogr(word) ^ (BITS_PER_LONG - 1);
 }

 /**
  * fls64 - find last set bit in a 64-bit word
  * @word: the word to search
  *
  * This is defined in a similar way as the libc and compiler builtin
  * ffsll, but returns the position of the most significant set bit.
  *
  * fls64(value) returns 0 if value is 0 or the position of the last
  * set bit if value is nonzero. The last (most significant) bit is
  * at position 64.
  */
 static inline int fls64(unsigned long word)
 {
 	unsigned long mask = 2 * BITS_PER_LONG - 1;

 	return (1 + (__flogr(word) ^ (BITS_PER_LONG - 1))) & mask;
 }

 /**
  * fls - find last (most-significant) bit set
  * @word: the word to search
  *
  * This is defined the same way as ffs.
  * Note fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32.
  */
 static inline int fls(int word)
 {
 	return fls64((unsigned int)word);
 }

 #else /* CONFIG_HAVE_MARCH_Z9_109_FEATURES */

 #include <asm-generic/bitops/__ffs.h>
 #include <asm-generic/bitops/ffs.h>
 #include <asm-generic/bitops/__fls.h>
 #include <asm-generic/bitops/fls.h>
 #include <asm-generic/bitops/fls64.h>

 #endif /* CONFIG_HAVE_MARCH_Z9_109_FEATURES */

 #include <asm-generic/bitops/ffz.h>
 #include <asm-generic/bitops/find.h>
 #include <asm-generic/bitops/hweight.h>
 #include <asm-generic/bitops/lock.h>
 #include <asm-generic/bitops/sched.h>
 #include <asm-generic/bitops/le.h>
 #include <asm-generic/bitops/ext2-atomic-setbit.h>

 #endif /* _S390_BITOPS_H */
	/*
	* Copyright IBM Corp. 1999,2013
	*
	* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>,
	*
	* The description below was taken in large parts from the powerpc
	* bitops header file:
	* Within a word, bits are numbered LSB first. Lot's of places make
	* this assumption by directly testing bits with (val & (1<<nr)).
	* This can cause confusion for large (> 1 word) bitmaps on a
	* big-endian system because, unlike little endian, the number of each
	* bit depends on the word size.
	*
	* The bitop functions are defined to work on unsigned longs, so for an
	* s390x system the bits end up numbered:
	* \|63..............0\|127............64\|191...........128\|255...........192\|
	* and on s390:
	* \|31.....0\|63....32\|95....64\|127...96\|159..128\|191..160\|223..192\|255..224\|
	*
	* There are a few little-endian macros used mostly for filesystem
	* bitmaps, these work on similar bit arrays layouts, but
	* byte-oriented:
	* \|7...0\|15...8\|23...16\|31...24\|39...32\|47...40\|55...48\|63...56\|
	*
	* The main difference is that bit 3-5 (64b) or 3-4 (32b) in the bit
	* number field needs to be reversed compared to the big-endian bit
	* fields. This can be achieved by XOR with 0x38 (64b) or 0x18 (32b).
	*
	* We also have special functions which work with an MSB0 encoding:
	* on an s390x system the bits are numbered:
	* \|0..............63\|64............127\|128...........191\|192...........255\|
	* and on s390:
	* \|0.....31\|32....63\|64....95\|96...127\|128..159\|160..191\|192..223\|224..255\|
	*
	* The main difference is that bit 0-63 (64b) or 0-31 (32b) in the bit
	* number field needs to be reversed compared to the LSB0 encoded bit
	* fields. This can be achieved by XOR with 0x3f (64b) or 0x1f (32b).
	*
	*/

	#ifndef _S390_BITOPS_H
	#define _S390_BITOPS_H

	#ifndef _LINUX_BITOPS_H
	#error only <linux/bitops.h> can be included directly
	#endif

	#include <linux/typecheck.h>
	#include <linux/compiler.h>

	#ifndef CONFIG_64BIT

	#define __BITOPS_OR "or"
	#define __BITOPS_AND "nr"
	#define __BITOPS_XOR "xr"

	#define __BITOPS_LOOP(__addr, __val, __op_string) \
	({ \
	unsigned long __old, __new; \
	\
	typecheck(unsigned long *, (__addr)); \
	asm volatile( \
	" l %0,%2\n" \
	"0: lr %1,%0\n" \
	__op_string " %1,%3\n" \
	" cs %0,%1,%2\n" \
	" jl 0b" \
	: "=&d" (__old), "=&d" (__new), "+Q" (*(__addr))\
	: "d" (__val) \
	: "cc"); \
	__old; \
	})

	#else /* CONFIG_64BIT */

	#ifdef CONFIG_HAVE_MARCH_Z196_FEATURES

	#define __BITOPS_OR "laog"
	#define __BITOPS_AND "lang"
	#define __BITOPS_XOR "laxg"

	#define __BITOPS_LOOP(__addr, __val, __op_string) \
	({ \
	unsigned long __old; \
	\
	typecheck(unsigned long *, (__addr)); \
	asm volatile( \
	__op_string " %0,%2,%1\n" \
	: "=d" (__old), "+Q" (*(__addr)) \
	: "d" (__val) \
	: "cc"); \
	__old; \
	})

	#else /* CONFIG_HAVE_MARCH_Z196_FEATURES */

	#define __BITOPS_OR "ogr"
	#define __BITOPS_AND "ngr"
	#define __BITOPS_XOR "xgr"

	#define __BITOPS_LOOP(__addr, __val, __op_string) \
	({ \
	unsigned long __old, __new; \
	\
	typecheck(unsigned long *, (__addr)); \
	asm volatile( \
	" lg %0,%2\n" \
	"0: lgr %1,%0\n" \
	__op_string " %1,%3\n" \
	" csg %0,%1,%2\n" \
	" jl 0b" \
	: "=&d" (__old), "=&d" (__new), "+Q" (*(__addr))\
	: "d" (__val) \
	: "cc"); \
	__old; \
	})

	#endif /* CONFIG_HAVE_MARCH_Z196_FEATURES */

	#endif /* CONFIG_64BIT */

	#define __BITOPS_WORDS(bits) (((bits) + BITS_PER_LONG - 1) / BITS_PER_LONG)

	static inline unsigned long *
	__bitops_word(unsigned long nr, volatile unsigned long *ptr)
	{
	unsigned long addr;

	addr = (unsigned long)ptr + ((nr ^ (nr & (BITS_PER_LONG - 1))) >> 3);
	return (unsigned long *)addr;
	}

	static inline unsigned char *
	__bitops_byte(unsigned long nr, volatile unsigned long *ptr)
	{
	return ((unsigned char *)ptr) + ((nr ^ (BITS_PER_LONG - 8)) >> 3);
	}

	static inline void set_bit(unsigned long nr, volatile unsigned long *ptr)
	{
	unsigned long *addr = __bitops_word(nr, ptr);
	unsigned long mask;

	#ifdef CONFIG_HAVE_MARCH_ZEC12_FEATURES
	if (__builtin_constant_p(nr)) {
	unsigned char *caddr = __bitops_byte(nr, ptr);

	asm volatile(
	"oi %0,%b1\n"
	: "+Q" (*caddr)
	: "i" (1 << (nr & 7))
	: "cc");
	return;
	}
	#endif
	mask = 1UL << (nr & (BITS_PER_LONG - 1));
	__BITOPS_LOOP(addr, mask, __BITOPS_OR);
	}

	static inline void clear_bit(unsigned long nr, volatile unsigned long *ptr)
	{
	unsigned long *addr = __bitops_word(nr, ptr);
	unsigned long mask;

	#ifdef CONFIG_HAVE_MARCH_ZEC12_FEATURES
	if (__builtin_constant_p(nr)) {
	unsigned char *caddr = __bitops_byte(nr, ptr);

	asm volatile(
	"ni %0,%b1\n"
	: "+Q" (*caddr)
	: "i" (~(1 << (nr & 7)))
	: "cc");
	return;
	}
	#endif
	mask = ~(1UL << (nr & (BITS_PER_LONG - 1)));
	__BITOPS_LOOP(addr, mask, __BITOPS_AND);
	}

	static inline void change_bit(unsigned long nr, volatile unsigned long *ptr)
	{
	unsigned long *addr = __bitops_word(nr, ptr);
	unsigned long mask;

	#ifdef CONFIG_HAVE_MARCH_ZEC12_FEATURES
	if (__builtin_constant_p(nr)) {
	unsigned char *caddr = __bitops_byte(nr, ptr);

	asm volatile(
	"xi %0,%b1\n"
	: "+Q" (*caddr)
	: "i" (1 << (nr & 7))
	: "cc");
	return;
	}
	#endif
	mask = 1UL << (nr & (BITS_PER_LONG - 1));
	__BITOPS_LOOP(addr, mask, __BITOPS_XOR);
	}

	static inline int
	test_and_set_bit(unsigned long nr, volatile unsigned long *ptr)
	{
	unsigned long *addr = __bitops_word(nr, ptr);
	unsigned long old, mask;

	mask = 1UL << (nr & (BITS_PER_LONG - 1));
	old = __BITOPS_LOOP(addr, mask, __BITOPS_OR);
	barrier();
	return (old & mask) != 0;
	}

	static inline int
	test_and_clear_bit(unsigned long nr, volatile unsigned long *ptr)
	{
	unsigned long *addr = __bitops_word(nr, ptr);
	unsigned long old, mask;

	mask = ~(1UL << (nr & (BITS_PER_LONG - 1)));
	old = __BITOPS_LOOP(addr, mask, __BITOPS_AND);
	barrier();
	return (old & ~mask) != 0;
	}

	static inline int
	test_and_change_bit(unsigned long nr, volatile unsigned long *ptr)
	{
	unsigned long *addr = __bitops_word(nr, ptr);
	unsigned long old, mask;

	mask = 1UL << (nr & (BITS_PER_LONG - 1));
	old = __BITOPS_LOOP(addr, mask, __BITOPS_XOR);
	barrier();
	return (old & mask) != 0;
	}

	static inline void __set_bit(unsigned long nr, volatile unsigned long *ptr)
	{
	unsigned char *addr = __bitops_byte(nr, ptr);

	*addr \|= 1 << (nr & 7);
	}

	static inline void
	__clear_bit(unsigned long nr, volatile unsigned long *ptr)
	{
	unsigned char *addr = __bitops_byte(nr, ptr);

	*addr &= ~(1 << (nr & 7));
	}

	static inline void __change_bit(unsigned long nr, volatile unsigned long *ptr)
	{
	unsigned char *addr = __bitops_byte(nr, ptr);

	*addr ^= 1 << (nr & 7);
	}

	static inline int
	__test_and_set_bit(unsigned long nr, volatile unsigned long *ptr)
	{
	unsigned char *addr = __bitops_byte(nr, ptr);
	unsigned char ch;

	ch = *addr;
	*addr \|= 1 << (nr & 7);
	return (ch >> (nr & 7)) & 1;
	}

	static inline int
	__test_and_clear_bit(unsigned long nr, volatile unsigned long *ptr)
	{
	unsigned char *addr = __bitops_byte(nr, ptr);
	unsigned char ch;

	ch = *addr;
	*addr &= ~(1 << (nr & 7));
	return (ch >> (nr & 7)) & 1;
	}

	static inline int
	__test_and_change_bit(unsigned long nr, volatile unsigned long *ptr)
	{
	unsigned char *addr = __bitops_byte(nr, ptr);
	unsigned char ch;

	ch = *addr;
	*addr ^= 1 << (nr & 7);
	return (ch >> (nr & 7)) & 1;
	}

	static inline int test_bit(unsigned long nr, const volatile unsigned long *ptr)
	{
	const volatile unsigned char *addr;

	addr = ((const volatile unsigned char *)ptr);
	addr += (nr ^ (BITS_PER_LONG - 8)) >> 3;
	return (*addr >> (nr & 7)) & 1;
	}

	/*
	* Functions which use MSB0 bit numbering.
	* On an s390x system the bits are numbered:
	* \|0..............63\|64............127\|128...........191\|192...........255\|
	* and on s390:
	* \|0.....31\|32....63\|64....95\|96...127\|128..159\|160..191\|192..223\|224..255\|
	*/
	unsigned long find_first_bit_inv(const unsigned long *addr, unsigned long size);
	unsigned long find_next_bit_inv(const unsigned long *addr, unsigned long size,
	unsigned long offset);

	static inline void set_bit_inv(unsigned long nr, volatile unsigned long *ptr)
	{
	return set_bit(nr ^ (BITS_PER_LONG - 1), ptr);
	}

	static inline void clear_bit_inv(unsigned long nr, volatile unsigned long *ptr)
	{
	return clear_bit(nr ^ (BITS_PER_LONG - 1), ptr);
	}

	static inline void __set_bit_inv(unsigned long nr, volatile unsigned long *ptr)
	{
	return __set_bit(nr ^ (BITS_PER_LONG - 1), ptr);
	}

	static inline void __clear_bit_inv(unsigned long nr, volatile unsigned long *ptr)
	{
	return __clear_bit(nr ^ (BITS_PER_LONG - 1), ptr);
	}

	static inline int test_bit_inv(unsigned long nr,
	const volatile unsigned long *ptr)
	{
	return test_bit(nr ^ (BITS_PER_LONG - 1), ptr);
	}

	#ifdef CONFIG_HAVE_MARCH_Z9_109_FEATURES

	/**
	* __flogr - find leftmost one
	* @word - The word to search
	*
	* Returns the bit number of the most significant bit set,
	* where the most significant bit has bit number 0.
	* If no bit is set this function returns 64.
	*/
	static inline unsigned char __flogr(unsigned long word)
	{
	if (__builtin_constant_p(word)) {
	unsigned long bit = 0;

	if (!word)
	return 64;
	if (!(word & 0xffffffff00000000UL)) {
	word <<= 32;
	bit += 32;
	}
	if (!(word & 0xffff000000000000UL)) {
	word <<= 16;
	bit += 16;
	}
	if (!(word & 0xff00000000000000UL)) {
	word <<= 8;
	bit += 8;
	}
	if (!(word & 0xf000000000000000UL)) {
	word <<= 4;
	bit += 4;
	}
	if (!(word & 0xc000000000000000UL)) {
	word <<= 2;
	bit += 2;
	}
	if (!(word & 0x8000000000000000UL)) {
	word <<= 1;
	bit += 1;
	}
	return bit;
	} else {
	register unsigned long bit asm("4") = word;
	register unsigned long out asm("5");

	asm volatile(
	" flogr %[bit],%[bit]\n"
	: [bit] "+d" (bit), [out] "=d" (out) : : "cc");
	return bit;
	}
	}

	/**
	* __ffs - find first bit in word.
	* @word: The word to search
	*
	* Undefined if no bit exists, so code should check against 0 first.
	*/
	static inline unsigned long __ffs(unsigned long word)
	{
	return __flogr(-word & word) ^ (BITS_PER_LONG - 1);
	}

	/**
	* ffs - find first bit set
	* @word: the word to search
	*
	* This is defined the same way as the libc and
	* compiler builtin ffs routines (man ffs).
	*/
	static inline int ffs(int word)
	{
	unsigned long mask = 2 * BITS_PER_LONG - 1;
	unsigned int val = (unsigned int)word;

	return (1 + (__flogr(-val & val) ^ (BITS_PER_LONG - 1))) & mask;
	}

	/**
	* __fls - find last (most-significant) set bit in a long word
	* @word: the word to search
	*
	* Undefined if no set bit exists, so code should check against 0 first.
	*/
	static inline unsigned long __fls(unsigned long word)
	{
	return __flogr(word) ^ (BITS_PER_LONG - 1);
	}

	/**
	* fls64 - find last set bit in a 64-bit word
	* @word: the word to search
	*
	* This is defined in a similar way as the libc and compiler builtin
	* ffsll, but returns the position of the most significant set bit.
	*
	* fls64(value) returns 0 if value is 0 or the position of the last
	* set bit if value is nonzero. The last (most significant) bit is
	* at position 64.
	*/
	static inline int fls64(unsigned long word)
	{
	unsigned long mask = 2 * BITS_PER_LONG - 1;

	return (1 + (__flogr(word) ^ (BITS_PER_LONG - 1))) & mask;
	}

	/**
	* fls - find last (most-significant) bit set
	* @word: the word to search
	*
	* This is defined the same way as ffs.
	* Note fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32.
	*/
	static inline int fls(int word)
	{
	return fls64((unsigned int)word);
	}

	#else /* CONFIG_HAVE_MARCH_Z9_109_FEATURES */

	#include <asm-generic/bitops/__ffs.h>
	#include <asm-generic/bitops/ffs.h>
	#include <asm-generic/bitops/__fls.h>
	#include <asm-generic/bitops/fls.h>
	#include <asm-generic/bitops/fls64.h>

	#endif /* CONFIG_HAVE_MARCH_Z9_109_FEATURES */

	#include <asm-generic/bitops/ffz.h>
	#include <asm-generic/bitops/find.h>
	#include <asm-generic/bitops/hweight.h>
	#include <asm-generic/bitops/lock.h>
	#include <asm-generic/bitops/sched.h>
	#include <asm-generic/bitops/le.h>
	#include <asm-generic/bitops/ext2-atomic-setbit.h>

	#endif /* _S390_BITOPS_H */