-#ifndef __ASM_SPINLOCK_H
-#define __ASM_SPINLOCK_H
-
-#ifndef __SMP__
-/*
- * Your basic spinlocks, allowing only a single CPU anywhere
- *
- * Gcc-2.7.x has a nasty bug with empty initializers.
- */
-#if (__GNUC__ > 2) || (__GNUC__ == 2 && __GNUC_MINOR__ >= 8)
- typedef struct { } spinlock_t;
- #define SPIN_LOCK_UNLOCKED (spinlock_t) { }
-#else
- typedef struct { int gcc_is_buggy; } spinlock_t;
- #define SPIN_LOCK_UNLOCKED (spinlock_t) { 0 }
-#endif
-
-#define spin_lock_init(lock) do { } while(0)
-#define spin_lock(lock) (void)(lock) /* Avoid warnings about unused variable */
-#define spin_trylock(lock) (1)
-#define spin_unlock_wait(lock) do { } while(0)
-#define spin_unlock(lock) do { } while(0)
-#define spin_lock_irq(lock) cli()
-#define spin_unlock_irq(lock) sti()
-#define spin_lock_bh(lock) local_bh_disable()
-#define spin_unlock_bh(lock) local_bh_enable()
-#define spin_lock_irqsave(lock, flags) \
- do { save_flags(flags); cli(); } while (0)
-
-#define spin_unlock_irqrestore(lock, flags) \
- restore_flags(flags)
-
-/*
- * 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.
- *
- * Gcc-2.7.x has a nasty bug with empty initializers.
- */
-#if (__GNUC__ > 2) || (__GNUC__ == 2 && __GNUC_MINOR__ >= 8)
- typedef struct { } rwlock_t;
- #define RW_LOCK_UNLOCKED (rwlock_t) { }
-#else
- typedef struct { int gcc_is_buggy; } rwlock_t;
- #define RW_LOCK_UNLOCKED (rwlock_t) { 0 }
-#endif
-
-#define read_lock(lock) (void)(lock) /* Avoid warnings about unused variable */
-#define read_unlock(lock) do { } while(0)
-#define write_lock(lock) (void)(lock) /* Likewise */
-#define write_unlock(lock) do { } while(0)
-#define read_lock_irq(lock) cli()
-#define read_unlock_irq(lock) sti()
-#define write_lock_irq(lock) cli()
-#define write_unlock_irq(lock) sti()
-#define read_lock_bh(lock) local_bh_disable()
-#define read_unlock_bh(lock) local_bh_enable()
-#define write_lock_bh(lock) local_bh_disable()
-#define write_unlock_bh(lock) local_bh_enable()
-
-#define read_lock_irqsave(lock, flags) \
- do { save_flags(flags); cli(); } while (0)
-#define read_unlock_irqrestore(lock, flags) \
- restore_flags(flags)
-#define write_lock_irqsave(lock, flags) \
- do { save_flags(flags); cli(); } while (0)
-#define write_unlock_irqrestore(lock, flags) \
- restore_flags(flags)
-
-#else /* __SMP__ */
-
-/* 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.
- */
-
-typedef struct {
- volatile unsigned long lock;
- volatile unsigned long owner_pc;
- volatile unsigned long owner_cpu;
-} spinlock_t;
-
-#define SPIN_LOCK_UNLOCKED (spinlock_t) { 0, 0, 0 }
-#define spin_lock_init(lp) do { (lp)->lock = 0; } while(0)
-#define spin_unlock_wait(lp) do { barrier(); } while((lp)->lock)
-
-extern void _spin_lock(spinlock_t *lock);
-extern void _spin_unlock(spinlock_t *lock);
-extern int spin_trylock(spinlock_t *lock);
-
-#define spin_lock(lp) _spin_lock(lp)
-#define spin_unlock(lp) _spin_unlock(lp)
-
-#define spin_lock_irq(lock) \
- do { __cli(); spin_lock(lock); } while (0)
-#define spin_lock_bh(___lk) do { local_bh_disable(); spin_lock(___lk); } while(0)
-
-#define spin_unlock_irq(lock) \
- do { spin_unlock(lock); __sti(); } while (0)
-#define spin_unlock_bh(___lk) do { spin_unlock(___lk); local_bh_enable(); } while(0)
-
-#define spin_lock_irqsave(lock, flags) \
- do { __save_flags(flags); __cli(); spin_lock(lock); } while (0)
-#define spin_unlock_irqrestore(lock, flags) \
- do { spin_unlock(lock); __restore_flags(flags); } while (0)
-
-extern unsigned long __spin_trylock(volatile unsigned long *lock);
-
-/*
- * 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.
- */
-typedef struct {
- volatile unsigned long lock;
- volatile unsigned long owner_pc;
-} rwlock_t;
-
-#define RW_LOCK_UNLOCKED (rwlock_t) { 0, 0 }
-
-extern void _read_lock(rwlock_t *rw);
-extern void _read_unlock(rwlock_t *rw);
-extern void _write_lock(rwlock_t *rw);
-extern void _write_unlock(rwlock_t *rw);
-
-#define read_lock(rw) _read_lock(rw)
-#define write_lock(rw) _write_lock(rw)
-#define write_unlock(rw) _write_unlock(rw)
-#define read_unlock(rw) _read_unlock(rw)
-
-#define read_lock_irq(lock) do { __cli(); read_lock(lock); } while (0)
-#define read_lock_bh(lock) do { local_bh_disable(); read_lock(lock); } while (0)
-#define read_unlock_irq(lock) do { read_unlock(lock); __sti(); } while (0)
-#define read_unlock_bh(lock) do { read_unlock(lock); local_bh_enable(); } while (0)
-#define write_lock_irq(lock) do { __cli(); write_lock(lock); } while (0)
-#define write_lock_bh(lock) do { local_bh_disable(); write_lock(lock); } while(0)
-#define write_unlock_irq(lock) do { write_unlock(lock); __sti(); } while (0)
-#define write_unlock_bh(lock) do { write_unlock(lock); local_bh_enable(); } while(0)
-#define read_lock_irqsave(lock, flags) \
- do { __save_flags(flags); __cli(); read_lock(lock); } while (0)
-#define read_unlock_irqrestore(lock, flags) \
- do { read_unlock(lock); __restore_flags(flags); } while (0)
-#define write_lock_irqsave(lock, flags) \
- do { __save_flags(flags); __cli(); write_lock(lock); } while (0)
-#define write_unlock_irqrestore(lock, flags) \
- do { write_unlock(lock); __restore_flags(flags); } while (0)
-
-#endif /* SMP */
-#endif /* __ASM_SPINLOCK_H */
+#ifndef __ASM_SPINLOCK_H
+#define __ASM_SPINLOCK_H
+
+/* 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.
+ */
+
+typedef struct {
+ volatile unsigned long lock;
+ volatile unsigned long owner_pc;
+ volatile unsigned long owner_cpu;
+} spinlock_t;
+
+#define SPIN_LOCK_UNLOCKED (spinlock_t) { 0, 0, 0 }
+#define spin_lock_init(lp) do { (lp)->lock = 0; } while(0)
+#define spin_unlock_wait(lp) do { barrier(); } while((lp)->lock)
+
+extern void _spin_lock(spinlock_t *lock);
+extern void _spin_unlock(spinlock_t *lock);
+extern int spin_trylock(spinlock_t *lock);
+
+#define spin_lock(lp) _spin_lock(lp)
+#define spin_unlock(lp) _spin_unlock(lp)
+
+#define spin_lock_irq(lock) \
+ do { __cli(); spin_lock(lock); } while (0)
+#define spin_lock_bh(___lk) do { local_bh_disable(); spin_lock(___lk); } while(0)
+
+#define spin_unlock_irq(lock) \
+ do { spin_unlock(lock); __sti(); } while (0)
+#define spin_unlock_bh(___lk) do { spin_unlock(___lk); local_bh_enable(); } while(0)
+
+#define spin_lock_irqsave(lock, flags) \
+ do { __save_flags(flags); __cli(); spin_lock(lock); } while (0)
+#define spin_unlock_irqrestore(lock, flags) \
+ do { spin_unlock(lock); __restore_flags(flags); } while (0)
+
+extern unsigned long __spin_trylock(volatile unsigned long *lock);
+
+/*
+ * 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.
+ */
+typedef struct {
+ volatile unsigned long lock;
+ volatile unsigned long owner_pc;
+} rwlock_t;
+
+#define RW_LOCK_UNLOCKED (rwlock_t) { 0, 0 }
+
+extern void _read_lock(rwlock_t *rw);
+extern void _read_unlock(rwlock_t *rw);
+extern void _write_lock(rwlock_t *rw);
+extern void _write_unlock(rwlock_t *rw);
+
+#define read_lock(rw) _read_lock(rw)
+#define write_lock(rw) _write_lock(rw)
+#define write_unlock(rw) _write_unlock(rw)
+#define read_unlock(rw) _read_unlock(rw)
+
+#endif /* __ASM_SPINLOCK_H */
