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[SPARC64]: sparc64 preempt + smp 

PREEMPT+SMP support - see if it looks sane...

Signed-off-by: Al Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Al Viro 2005-04-20 17:12:41 -07:00 committed by David S. Miller
parent 4d78b6c78a
commit 489ec5f5d5
1 changed files with 31 additions and 17 deletions
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48
include/asm-sparc64/spinlock.h
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@ -31,15 +31,20 @@
#ifndef CONFIG_DEBUG_SPINLOCK
typedef unsigned char spinlock_t;
#define SPIN_LOCK_UNLOCKED 0
typedef struct {
volatile unsigned char lock;
#ifdef CONFIG_PREEMPT
unsigned int break_lock;
#endif
} spinlock_t;
#define SPIN_LOCK_UNLOCKED (spinlock_t) {0,}
#define spin_lock_init(lock) (*((unsigned char *)(lock)) = 0)
#define spin_is_locked(lock) (*((volatile unsigned char *)(lock)) != 0)
#define spin_lock_init(lp) do { *(lp)= SPIN_LOCK_UNLOCKED; } while(0)
#define spin_is_locked(lp) ((lp)->lock != 0)
#define spin_unlock_wait(lock) \
#define spin_unlock_wait(lp) \
do { membar("#LoadLoad"); \
} while(*((volatile unsigned char *)lock))
} while(lp->lock)
static inline void _raw_spin_lock(spinlock_t *lock)
{
@ -109,20 +114,19 @@ static inline void _raw_spin_lock_flags(spinlock_t *lock, unsigned long flags)
#else /* !(CONFIG_DEBUG_SPINLOCK) */
typedef struct {
unsigned char lock;
volatile unsigned char lock;
unsigned int owner_pc, owner_cpu;
#ifdef CONFIG_PREEMPT
unsigned int break_lock;
#endif
} spinlock_t;
#define SPIN_LOCK_UNLOCKED (spinlock_t) { 0, 0, 0xff }
#define spin_lock_init(__lock) \
do { (__lock)->lock = 0; \
(__lock)->owner_pc = 0; \
(__lock)->owner_cpu = 0xff; \
} while(0)
#define spin_is_locked(__lock) (*((volatile unsigned char *)(&((__lock)->lock))) != 0)
#define spin_lock_init(lp) do { *(lp)= SPIN_LOCK_UNLOCKED; } while(0)
#define spin_is_locked(__lock) ((__lock)->lock != 0)
#define spin_unlock_wait(__lock) \
do { \
membar("#LoadLoad"); \
} while(*((volatile unsigned char *)(&((__lock)->lock))))
} while((__lock)->lock)
extern void _do_spin_lock (spinlock_t *lock, char *str);
extern void _do_spin_unlock (spinlock_t *lock);
@ -139,8 +143,13 @@ extern int _do_spin_trylock (spinlock_t *lock);
#ifndef CONFIG_DEBUG_SPINLOCK
typedef unsigned int rwlock_t;
#define RW_LOCK_UNLOCKED 0
typedef struct {
volatile unsigned int lock;
#ifdef CONFIG_PREEMPT
unsigned int break_lock;
#endif
} rwlock_t;
#define RW_LOCK_UNLOCKED {0,}
#define rwlock_init(lp) do { *(lp) = RW_LOCK_UNLOCKED; } while(0)
static void inline __read_lock(rwlock_t *lock)
@ -251,9 +260,12 @@ static int inline __write_trylock(rwlock_t *lock)
#else /* !(CONFIG_DEBUG_SPINLOCK) */
typedef struct {
unsigned long lock;
volatile unsigned long lock;
unsigned int writer_pc, writer_cpu;
unsigned int reader_pc[NR_CPUS];
#ifdef CONFIG_PREEMPT
unsigned int break_lock;
#endif
} rwlock_t;
#define RW_LOCK_UNLOCKED (rwlock_t) { 0, 0, 0xff, { } }
#define rwlock_init(lp) do { *(lp) = RW_LOCK_UNLOCKED; } while(0)
@ -304,6 +316,8 @@ do { unsigned long flags; \
#endif /* CONFIG_DEBUG_SPINLOCK */
#define _raw_read_trylock(lock) generic_raw_read_trylock(lock)
#define read_can_lock(rw) (!((rw)->lock & 0x80000000UL))
#define write_can_lock(rw) (!(rw)->lock)
#endif /* !(__ASSEMBLY__) */