x86: merge spinlock.h variants

Merge them finally together

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 0 insertions, 208 deletions

diff --git a/include/asm-x86/spinlock_32.h b/include/asm-x86/spinlock_32.h
deleted file mode 100644
index 2de9b8b89903..000000000000
--- a/include/asm-x86/spinlock_32.h
+++ /dev/null
@@ -1,208 +0,0 @@
-#ifndef __ASM_SPINLOCK_H
-#define __ASM_SPINLOCK_H
-
-#include <asm/atomic.h>
-#include <asm/rwlock.h>
-#include <asm/page.h>
-#include <asm/processor.h>
-
-/*
- * Your basic SMP spinlocks, allowing only a single CPU anywhere
- *
- * Simple spin lock operations.  There are two variants, one clears IRQ's
- * on the local processor, one does not.
- *
- * We make no fairness assumptions. They have a cost.
- *
- * (the type definitions are in asm/spinlock_types.h)
- */
-
-typedef char _slock_t;
-#define LOCK_INS_DEC "decb"
-#define LOCK_INS_XCH "xchgb"
-#define LOCK_INS_MOV "movb"
-#define LOCK_INS_CMP "cmpb"
-#define LOCK_PTR_REG "a"
-
-static inline int __raw_spin_is_locked(raw_spinlock_t *lock)
-{
-        return *(volatile _slock_t *)(&(lock)->slock) <= 0;
-}
-
-static inline void __raw_spin_lock(raw_spinlock_t *lock)
-{
-        asm volatile(
-                "\n1:\t"
-                LOCK_PREFIX " ; " LOCK_INS_DEC " %0\n\t"
-                "jns 3f\n"
-                "2:\t"
-                "rep;nop\n\t"
-                LOCK_INS_CMP " $0,%0\n\t"
-                "jle 2b\n\t"
-                "jmp 1b\n"
-                "3:\n\t"
-                : "+m" (lock->slock) : : "memory");
-}
-
-/*
- * It is easier for the lock validator if interrupts are not re-enabled
- * in the middle of a lock-acquire. This is a performance feature anyway
- * so we turn it off:
- *
- * NOTE: there's an irqs-on section here, which normally would have to be
- * irq-traced, but on CONFIG_TRACE_IRQFLAGS we never use this variant.
- */
-#ifndef CONFIG_PROVE_LOCKING
-static inline void __raw_spin_lock_flags(raw_spinlock_t *lock,
-                                         unsigned long flags)
-{
-        asm volatile(
-                "\n1:\t"
-                LOCK_PREFIX " ; " LOCK_INS_DEC " %[slock]\n\t"
-                "jns 5f\n"
-                "testl $0x200, %[flags]\n\t"
-                "jz 4f\n\t"
-                STI_STRING "\n"
-                "3:\t"
-                "rep;nop\n\t"
-                LOCK_INS_CMP " $0, %[slock]\n\t"
-                "jle 3b\n\t"
-                CLI_STRING "\n\t"
-                "jmp 1b\n"
-                "4:\t"
-                "rep;nop\n\t"
-                LOCK_INS_CMP " $0, %[slock]\n\t"
-                "jg 1b\n\t"
-                "jmp 4b\n"
-                "5:\n\t"
-                : [slock] "+m" (lock->slock)
-                : [flags] "r" ((u32)flags)
-                  CLI_STI_INPUT_ARGS
-                : "memory" CLI_STI_CLOBBERS);
-}
-#endif
-
-static inline int __raw_spin_trylock(raw_spinlock_t *lock)
-{
-        _slock_t oldval;
-
-        asm volatile(
-                LOCK_INS_XCH " %0,%1"
-                :"=q" (oldval), "+m" (lock->slock)
-                :"0" (0) : "memory");
-
-        return oldval > 0;
-}
-
-/*
- * __raw_spin_unlock based on writing $1 to the low byte.
- * This method works. Despite all the confusion.
- * (except on PPro SMP or if we are using OOSTORE, so we use xchgb there)
- * (PPro errata 66, 92)
- */
-
-#if !defined(CONFIG_X86_OOSTORE) && !defined(CONFIG_X86_PPRO_FENCE)
-
-static inline void __raw_spin_unlock(raw_spinlock_t *lock)
-{
-        asm volatile(LOCK_INS_MOV " $1,%0" : "=m" (lock->slock) :: "memory");
-}
-
-#else
-
-static inline void __raw_spin_unlock(raw_spinlock_t *lock)
-{
-        unsigned char oldval = 1;
-
-        asm volatile("xchgb %b0, %1"
-                     : "=q" (oldval), "+m" (lock->slock)
-                     : "0" (oldval) : "memory");
-}
-
-#endif
-
-static inline void __raw_spin_unlock_wait(raw_spinlock_t *lock)
-{
-        while (__raw_spin_is_locked(lock))
-                cpu_relax();
-}
-
-/*
- * Read-write spinlocks, allowing multiple readers
- * but only one writer.
- *
- * NOTE! it is quite common to have readers in interrupts
- * but no interrupt writers. For those circumstances we
- * can "mix" irq-safe locks - any writer needs to get a
- * irq-safe write-lock, but readers can get non-irqsafe
- * read-locks.
- *
- * On x86, we implement read-write locks as a 32-bit counter
- * with the high bit (sign) being the "contended" bit.
- */
-
-static inline int __raw_read_can_lock(raw_rwlock_t *lock)
-{
-        return (int)(lock)->lock > 0;
-}
-
-static inline int __raw_write_can_lock(raw_rwlock_t *lock)
-{
-        return (lock)->lock == RW_LOCK_BIAS;
-}
-
-static inline void __raw_read_lock(raw_rwlock_t *rw)
-{
-        asm volatile(LOCK_PREFIX " subl $1,(%0)\n\t"
-                     "jns 1f\n"
-                     "call __read_lock_failed\n\t"
-                     "1:\n"
-                     ::LOCK_PTR_REG (rw) : "memory");
-}
-
-static inline void __raw_write_lock(raw_rwlock_t *rw)
-{
-        asm volatile(LOCK_PREFIX " subl %1,(%0)\n\t"
-                     "jz 1f\n"
-                     "call __write_lock_failed\n\t"
-                     "1:\n"
-                     ::LOCK_PTR_REG (rw), "i" (RW_LOCK_BIAS) : "memory");
-}
-
-static inline int __raw_read_trylock(raw_rwlock_t *lock)
-{
-        atomic_t *count = (atomic_t *)lock;
-
-        atomic_dec(count);
-        if (atomic_read(count) >= 0)
-                return 1;
-        atomic_inc(count);
-        return 0;
-}
-
-static inline int __raw_write_trylock(raw_rwlock_t *lock)
-{
-        atomic_t *count = (atomic_t *)lock;
-
-        if (atomic_sub_and_test(RW_LOCK_BIAS, count))
-                return 1;
-        atomic_add(RW_LOCK_BIAS, count);
-        return 0;
-}
-
-static inline void __raw_read_unlock(raw_rwlock_t *rw)
-{
-        asm volatile(LOCK_PREFIX "incl %0" :"+m" (rw->lock) : : "memory");
-}
-
-static inline void __raw_write_unlock(raw_rwlock_t *rw)
-{
-        asm volatile(LOCK_PREFIX "addl %1, %0"
-                     : "+m" (rw->lock) : "i" (RW_LOCK_BIAS) : "memory");
-}
-
-#define _raw_spin_relax(lock)   cpu_relax()
-#define _raw_read_relax(lock)   cpu_relax()
-#define _raw_write_relax(lock)  cpu_relax()
-
-#endif /* __ASM_SPINLOCK_H */