[S390] move include/asm-s390 to arch/s390/include/asm

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 0 insertions, 387 deletions

diff --git a/include/asm-s390/rwsem.h b/include/asm-s390/rwsem.h
deleted file mode 100644
index 9d2a1797..0000000
--- a/include/asm-s390/rwsem.h
+++ /dev/null
@@ -1,387 +0,0 @@
-#ifndef _S390_RWSEM_H
-#define _S390_RWSEM_H
-
-/*
- *  include/asm-s390/rwsem.h
- *
- *  S390 version
- *    Copyright (C) 2002 IBM Deutschland Entwicklung GmbH, IBM Corporation
- *    Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
- *
- *  Based on asm-alpha/semaphore.h and asm-i386/rwsem.h
- */
-
-/*
- *
- * The MSW of the count is the negated number of active writers and waiting
- * lockers, and the LSW is the total number of active locks
- *
- * The lock count is initialized to 0 (no active and no waiting lockers).
- *
- * When a writer subtracts WRITE_BIAS, it'll get 0xffff0001 for the case of an
- * uncontended lock. This can be determined because XADD returns the old value.
- * Readers increment by 1 and see a positive value when uncontended, negative
- * if there are writers (and maybe) readers waiting (in which case it goes to
- * sleep).
- *
- * The value of WAITING_BIAS supports up to 32766 waiting processes. This can
- * be extended to 65534 by manually checking the whole MSW rather than relying
- * on the S flag.
- *
- * The value of ACTIVE_BIAS supports up to 65535 active processes.
- *
- * This should be totally fair - if anything is waiting, a process that wants a
- * lock will go to the back of the queue. When the currently active lock is
- * released, if there's a writer at the front of the queue, then that and only
- * that will be woken up; if there's a bunch of consequtive readers at the
- * front, then they'll all be woken up, but no other readers will be.
- */
-
-#ifndef _LINUX_RWSEM_H
-#error "please don't include asm/rwsem.h directly, use linux/rwsem.h instead"
-#endif
-
-#ifdef __KERNEL__
-
-#include <linux/list.h>
-#include <linux/spinlock.h>
-
-struct rwsem_waiter;
-
-extern struct rw_semaphore *rwsem_down_read_failed(struct rw_semaphore *);
-extern struct rw_semaphore *rwsem_down_write_failed(struct rw_semaphore *);
-extern struct rw_semaphore *rwsem_wake(struct rw_semaphore *);
-extern struct rw_semaphore *rwsem_downgrade_wake(struct rw_semaphore *);
-extern struct rw_semaphore *rwsem_downgrade_write(struct rw_semaphore *);
-
-/*
- * the semaphore definition
- */
-struct rw_semaphore {
-	signed long		count;
-	spinlock_t		wait_lock;
-	struct list_head	wait_list;
-#ifdef CONFIG_DEBUG_LOCK_ALLOC
-	struct lockdep_map	dep_map;
-#endif
-};
-
-#ifndef __s390x__
-#define RWSEM_UNLOCKED_VALUE	0x00000000
-#define RWSEM_ACTIVE_BIAS	0x00000001
-#define RWSEM_ACTIVE_MASK	0x0000ffff
-#define RWSEM_WAITING_BIAS	(-0x00010000)
-#else /* __s390x__ */
-#define RWSEM_UNLOCKED_VALUE	0x0000000000000000L
-#define RWSEM_ACTIVE_BIAS	0x0000000000000001L
-#define RWSEM_ACTIVE_MASK	0x00000000ffffffffL
-#define RWSEM_WAITING_BIAS	(-0x0000000100000000L)
-#endif /* __s390x__ */
-#define RWSEM_ACTIVE_READ_BIAS	RWSEM_ACTIVE_BIAS
-#define RWSEM_ACTIVE_WRITE_BIAS	(RWSEM_WAITING_BIAS + RWSEM_ACTIVE_BIAS)
-
-/*
- * initialisation
- */
-
-#ifdef CONFIG_DEBUG_LOCK_ALLOC
-# define __RWSEM_DEP_MAP_INIT(lockname) , .dep_map = { .name = #lockname }
-#else
-# define __RWSEM_DEP_MAP_INIT(lockname)
-#endif
-
-#define __RWSEM_INITIALIZER(name) \
- { RWSEM_UNLOCKED_VALUE, __SPIN_LOCK_UNLOCKED((name).wait.lock), \
-   LIST_HEAD_INIT((name).wait_list) __RWSEM_DEP_MAP_INIT(name) }
-
-#define DECLARE_RWSEM(name) \
-	struct rw_semaphore name = __RWSEM_INITIALIZER(name)
-
-static inline void init_rwsem(struct rw_semaphore *sem)
-{
-	sem->count = RWSEM_UNLOCKED_VALUE;
-	spin_lock_init(&sem->wait_lock);
-	INIT_LIST_HEAD(&sem->wait_list);
-}
-
-extern void __init_rwsem(struct rw_semaphore *sem, const char *name,
-			 struct lock_class_key *key);
-
-#define init_rwsem(sem)				\
-do {						\
-	static struct lock_class_key __key;	\
-						\
-	__init_rwsem((sem), #sem, &__key);	\
-} while (0)
-
-
-/*
- * lock for reading
- */
-static inline void __down_read(struct rw_semaphore *sem)
-{
-	signed long old, new;
-
-	asm volatile(
-#ifndef __s390x__
-		"	l	%0,0(%3)\n"
-		"0:	lr	%1,%0\n"
-		"	ahi	%1,%5\n"
-		"	cs	%0,%1,0(%3)\n"
-		"	jl	0b"
-#else /* __s390x__ */
-		"	lg	%0,0(%3)\n"
-		"0:	lgr	%1,%0\n"
-		"	aghi	%1,%5\n"
-		"	csg	%0,%1,0(%3)\n"
-		"	jl	0b"
-#endif /* __s390x__ */
-		: "=&d" (old), "=&d" (new), "=m" (sem->count)
-		: "a" (&sem->count), "m" (sem->count),
-		  "i" (RWSEM_ACTIVE_READ_BIAS) : "cc", "memory");
-	if (old < 0)
-		rwsem_down_read_failed(sem);
-}
-
-/*
- * trylock for reading -- returns 1 if successful, 0 if contention
- */
-static inline int __down_read_trylock(struct rw_semaphore *sem)
-{
-	signed long old, new;
-
-	asm volatile(
-#ifndef __s390x__
-		"	l	%0,0(%3)\n"
-		"0:	ltr	%1,%0\n"
-		"	jm	1f\n"
-		"	ahi	%1,%5\n"
-		"	cs	%0,%1,0(%3)\n"
-		"	jl	0b\n"
-		"1:"
-#else /* __s390x__ */
-		"	lg	%0,0(%3)\n"
-		"0:	ltgr	%1,%0\n"
-		"	jm	1f\n"
-		"	aghi	%1,%5\n"
-		"	csg	%0,%1,0(%3)\n"
-		"	jl	0b\n"
-		"1:"
-#endif /* __s390x__ */
-		: "=&d" (old), "=&d" (new), "=m" (sem->count)
-		: "a" (&sem->count), "m" (sem->count),
-		  "i" (RWSEM_ACTIVE_READ_BIAS) : "cc", "memory");
-	return old >= 0 ? 1 : 0;
-}
-
-/*
- * lock for writing
- */
-static inline void __down_write_nested(struct rw_semaphore *sem, int subclass)
-{
-	signed long old, new, tmp;
-
-	tmp = RWSEM_ACTIVE_WRITE_BIAS;
-	asm volatile(
-#ifndef __s390x__
-		"	l	%0,0(%3)\n"
-		"0:	lr	%1,%0\n"
-		"	a	%1,%5\n"
-		"	cs	%0,%1,0(%3)\n"
-		"	jl	0b"
-#else /* __s390x__ */
-		"	lg	%0,0(%3)\n"
-		"0:	lgr	%1,%0\n"
-		"	ag	%1,%5\n"
-		"	csg	%0,%1,0(%3)\n"
-		"	jl	0b"
-#endif /* __s390x__ */
-		: "=&d" (old), "=&d" (new), "=m" (sem->count)
-		: "a" (&sem->count), "m" (sem->count), "m" (tmp)
-		: "cc", "memory");
-	if (old != 0)
-		rwsem_down_write_failed(sem);
-}
-
-static inline void __down_write(struct rw_semaphore *sem)
-{
-	__down_write_nested(sem, 0);
-}
-
-/*
- * trylock for writing -- returns 1 if successful, 0 if contention
- */
-static inline int __down_write_trylock(struct rw_semaphore *sem)
-{
-	signed long old;
-
-	asm volatile(
-#ifndef __s390x__
-		"	l	%0,0(%2)\n"
-		"0:	ltr	%0,%0\n"
-		"	jnz	1f\n"
-		"	cs	%0,%4,0(%2)\n"
-		"	jl	0b\n"
-#else /* __s390x__ */
-		"	lg	%0,0(%2)\n"
-		"0:	ltgr	%0,%0\n"
-		"	jnz	1f\n"
-		"	csg	%0,%4,0(%2)\n"
-		"	jl	0b\n"
-#endif /* __s390x__ */
-		"1:"
-		: "=&d" (old), "=m" (sem->count)
-		: "a" (&sem->count), "m" (sem->count),
-		  "d" (RWSEM_ACTIVE_WRITE_BIAS) : "cc", "memory");
-	return (old == RWSEM_UNLOCKED_VALUE) ? 1 : 0;
-}
-
-/*
- * unlock after reading
- */
-static inline void __up_read(struct rw_semaphore *sem)
-{
-	signed long old, new;
-
-	asm volatile(
-#ifndef __s390x__
-		"	l	%0,0(%3)\n"
-		"0:	lr	%1,%0\n"
-		"	ahi	%1,%5\n"
-		"	cs	%0,%1,0(%3)\n"
-		"	jl	0b"
-#else /* __s390x__ */
-		"	lg	%0,0(%3)\n"
-		"0:	lgr	%1,%0\n"
-		"	aghi	%1,%5\n"
-		"	csg	%0,%1,0(%3)\n"
-		"	jl	0b"
-#endif /* __s390x__ */
-		: "=&d" (old), "=&d" (new), "=m" (sem->count)
-		: "a" (&sem->count), "m" (sem->count),
-		  "i" (-RWSEM_ACTIVE_READ_BIAS)
-		: "cc", "memory");
-	if (new < 0)
-		if ((new & RWSEM_ACTIVE_MASK) == 0)
-			rwsem_wake(sem);
-}
-
-/*
- * unlock after writing
- */
-static inline void __up_write(struct rw_semaphore *sem)
-{
-	signed long old, new, tmp;
-
-	tmp = -RWSEM_ACTIVE_WRITE_BIAS;
-	asm volatile(
-#ifndef __s390x__
-		"	l	%0,0(%3)\n"
-		"0:	lr	%1,%0\n"
-		"	a	%1,%5\n"
-		"	cs	%0,%1,0(%3)\n"
-		"	jl	0b"
-#else /* __s390x__ */
-		"	lg	%0,0(%3)\n"
-		"0:	lgr	%1,%0\n"
-		"	ag	%1,%5\n"
-		"	csg	%0,%1,0(%3)\n"
-		"	jl	0b"
-#endif /* __s390x__ */
-		: "=&d" (old), "=&d" (new), "=m" (sem->count)
-		: "a" (&sem->count), "m" (sem->count), "m" (tmp)
-		: "cc", "memory");
-	if (new < 0)
-		if ((new & RWSEM_ACTIVE_MASK) == 0)
-			rwsem_wake(sem);
-}
-
-/*
- * downgrade write lock to read lock
- */
-static inline void __downgrade_write(struct rw_semaphore *sem)
-{
-	signed long old, new, tmp;
-
-	tmp = -RWSEM_WAITING_BIAS;
-	asm volatile(
-#ifndef __s390x__
-		"	l	%0,0(%3)\n"
-		"0:	lr	%1,%0\n"
-		"	a	%1,%5\n"
-		"	cs	%0,%1,0(%3)\n"
-		"	jl	0b"
-#else /* __s390x__ */
-		"	lg	%0,0(%3)\n"
-		"0:	lgr	%1,%0\n"
-		"	ag	%1,%5\n"
-		"	csg	%0,%1,0(%3)\n"
-		"	jl	0b"
-#endif /* __s390x__ */
-		: "=&d" (old), "=&d" (new), "=m" (sem->count)
-		: "a" (&sem->count), "m" (sem->count), "m" (tmp)
-		: "cc", "memory");
-	if (new > 1)
-		rwsem_downgrade_wake(sem);
-}
-
-/*
- * implement atomic add functionality
- */
-static inline void rwsem_atomic_add(long delta, struct rw_semaphore *sem)
-{
-	signed long old, new;
-
-	asm volatile(
-#ifndef __s390x__
-		"	l	%0,0(%3)\n"
-		"0:	lr	%1,%0\n"
-		"	ar	%1,%5\n"
-		"	cs	%0,%1,0(%3)\n"
-		"	jl	0b"
-#else /* __s390x__ */
-		"	lg	%0,0(%3)\n"
-		"0:	lgr	%1,%0\n"
-		"	agr	%1,%5\n"
-		"	csg	%0,%1,0(%3)\n"
-		"	jl	0b"
-#endif /* __s390x__ */
-		: "=&d" (old), "=&d" (new), "=m" (sem->count)
-		: "a" (&sem->count), "m" (sem->count), "d" (delta)
-		: "cc", "memory");
-}
-
-/*
- * implement exchange and add functionality
- */
-static inline long rwsem_atomic_update(long delta, struct rw_semaphore *sem)
-{
-	signed long old, new;
-
-	asm volatile(
-#ifndef __s390x__
-		"	l	%0,0(%3)\n"
-		"0:	lr	%1,%0\n"
-		"	ar	%1,%5\n"
-		"	cs	%0,%1,0(%3)\n"
-		"	jl	0b"
-#else /* __s390x__ */
-		"	lg	%0,0(%3)\n"
-		"0:	lgr	%1,%0\n"
-		"	agr	%1,%5\n"
-		"	csg	%0,%1,0(%3)\n"
-		"	jl	0b"
-#endif /* __s390x__ */
-		: "=&d" (old), "=&d" (new), "=m" (sem->count)
-		: "a" (&sem->count), "m" (sem->count), "d" (delta)
-		: "cc", "memory");
-	return new;
-}
-
-static inline int rwsem_is_locked(struct rw_semaphore *sem)
-{
-	return (sem->count != 0);
-}
-
-#endif /* __KERNEL__ */
-#endif /* _S390_RWSEM_H */