diff options
Diffstat (limited to 'include/linux/kref.h')
| -rw-r--r-- | include/linux/kref.h | 33 |
1 files changed, 0 insertions, 33 deletions
diff --git a/include/linux/kref.h b/include/linux/kref.h index 484604d184be..e15828fd71f1 100644 --- a/include/linux/kref.h +++ b/include/linux/kref.h | |||
| @@ -19,7 +19,6 @@ | |||
| 19 | #include <linux/atomic.h> | 19 | #include <linux/atomic.h> |
| 20 | #include <linux/kernel.h> | 20 | #include <linux/kernel.h> |
| 21 | #include <linux/mutex.h> | 21 | #include <linux/mutex.h> |
| 22 | #include <linux/spinlock.h> | ||
| 23 | 22 | ||
| 24 | struct kref { | 23 | struct kref { |
| 25 | atomic_t refcount; | 24 | atomic_t refcount; |
| @@ -99,38 +98,6 @@ static inline int kref_put(struct kref *kref, void (*release)(struct kref *kref) | |||
| 99 | return kref_sub(kref, 1, release); | 98 | return kref_sub(kref, 1, release); |
| 100 | } | 99 | } |
| 101 | 100 | ||
| 102 | /** | ||
| 103 | * kref_put_spinlock_irqsave - decrement refcount for object. | ||
| 104 | * @kref: object. | ||
| 105 | * @release: pointer to the function that will clean up the object when the | ||
| 106 | * last reference to the object is released. | ||
| 107 | * This pointer is required, and it is not acceptable to pass kfree | ||
| 108 | * in as this function. | ||
| 109 | * @lock: lock to take in release case | ||
| 110 | * | ||
| 111 | * Behaves identical to kref_put with one exception. If the reference count | ||
| 112 | * drops to zero, the lock will be taken atomically wrt dropping the reference | ||
| 113 | * count. The release function has to call spin_unlock() without _irqrestore. | ||
| 114 | */ | ||
| 115 | static inline int kref_put_spinlock_irqsave(struct kref *kref, | ||
| 116 | void (*release)(struct kref *kref), | ||
| 117 | spinlock_t *lock) | ||
| 118 | { | ||
| 119 | unsigned long flags; | ||
| 120 | |||
| 121 | WARN_ON(release == NULL); | ||
| 122 | if (atomic_add_unless(&kref->refcount, -1, 1)) | ||
| 123 | return 0; | ||
| 124 | spin_lock_irqsave(lock, flags); | ||
| 125 | if (atomic_dec_and_test(&kref->refcount)) { | ||
| 126 | release(kref); | ||
| 127 | local_irq_restore(flags); | ||
| 128 | return 1; | ||
| 129 | } | ||
| 130 | spin_unlock_irqrestore(lock, flags); | ||
| 131 | return 0; | ||
| 132 | } | ||
| 133 | |||
| 134 | static inline int kref_put_mutex(struct kref *kref, | 101 | static inline int kref_put_mutex(struct kref *kref, |
| 135 | void (*release)(struct kref *kref), | 102 | void (*release)(struct kref *kref), |
| 136 | struct mutex *lock) | 103 | struct mutex *lock) |
