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#ifndef _ASM_IA64_XENSPINLOCK_H
#define _ASM_IA64_XENSPINLOCK_H
/*
* spin_[un]lock_recursive(): Use these forms when the lock can (safely!) be
* reentered recursively on the same CPU. All critical regions that may form
* part of a recursively-nested set must be protected by these forms. If there
* are any critical regions that cannot form part of such a set, they can use
* standard spin_[un]lock().
*/
#define _raw_spin_lock_recursive(_lock) \
do { \
int cpu = smp_processor_id(); \
if ( likely((_lock)->recurse_cpu != cpu) ) \
{ \
spin_lock(_lock); \
(_lock)->recurse_cpu = cpu; \
} \
(_lock)->recurse_cnt++; \
} while ( 0 )
#define _raw_spin_unlock_recursive(_lock) \
do { \
if ( likely(--(_lock)->recurse_cnt == 0) ) \
{ \
(_lock)->recurse_cpu = -1; \
spin_unlock(_lock); \
} \
} while ( 0 )
#endif /* _ASM_IA64_XENSPINLOCK_H */
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