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#ifndef __BACKPORT_SPINLOCK_H
#define __BACKPORT_SPINLOCK_H
#include_next <linux/spinlock.h>
#if LINUX_VERSION_IS_LESS(3,18,0)
#ifndef CONFIG_DEBUG_LOCK_ALLOC
#undef raw_spin_lock_nested
/*
* Always evaluate the 'subclass' argument to avoid that the compiler
* warns about set-but-not-used variables when building with
* CONFIG_DEBUG_LOCK_ALLOC=n and with W=1.
*/
# define raw_spin_lock_nested(lock, subclass) \
_raw_spin_lock(((void)(subclass), (lock)))
# define raw_spin_lock_nest_lock(lock, nest_lock) _raw_spin_lock(lock)
#endif
#endif /* LINUX_VERSION_IS_LESS(3,18,0) */
#if LINUX_VERSION_IS_LESS(4,16,0)
int alloc_bucket_spinlocks(spinlock_t **locks, unsigned int *lock_mask,
size_t max_size, unsigned int cpu_mult,
gfp_t gfp);
void free_bucket_spinlocks(spinlock_t *locks);
#endif /* LINUX_VERSION_IS_LESS(4,16,0) */
#if LINUX_VERSION_IS_LESS(4,19,0)
int __alloc_bucket_spinlocks(spinlock_t **locks, unsigned int *lock_mask,
size_t max_size, unsigned int cpu_mult,
gfp_t gfp, const char *name,
struct lock_class_key *key);
#define alloc_bucket_spinlocks(locks, lock_mask, max_size, cpu_mult, gfp) \
({ \
static struct lock_class_key key; \
int ret; \
\
ret = __alloc_bucket_spinlocks(locks, lock_mask, max_size, \
cpu_mult, gfp, #locks, &key); \
ret; \
})
#endif /* LINUX_VERSION_IS_LESS(4,19,0) */
#endif /* __BACKPORT_SPINLOCK_H */
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