42 lines
541 B
C
42 lines
541 B
C
#include <sys/rwlock.h>
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int
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rw_lock_held(krwlock_t *rwlp)
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{
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BUG_ON(rwlp->rw_magic != RW_MAGIC);
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#ifdef CONFIG_RWSEM_GENERIC_SPINLOCK
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if (rwlp->rw_sem.activity != 0) {
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#else
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if (rwlp->rw_sem.count != 0) {
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#endif
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return 1;
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}
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return 0;
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}
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int
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rw_read_held(krwlock_t *rwlp)
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{
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BUG_ON(rwlp->rw_magic != RW_MAGIC);
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if (rw_lock_held(rwlp) && rwlp->rw_owner == NULL) {
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return 1;
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}
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return 0;
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}
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int
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rw_write_held(krwlock_t *rwlp)
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{
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BUG_ON(rwlp->rw_magic != RW_MAGIC);
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if (rwlp->rw_owner == current) {
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return 1;
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}
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return 0;
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}
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