diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/kref.h | 33 | ||||
| -rw-r--r-- | include/target/target_core_base.h | 5 |
2 files changed, 33 insertions, 5 deletions
diff --git a/include/linux/kref.h b/include/linux/kref.h index e15828fd71f1..484604d184be 100644 --- a/include/linux/kref.h +++ b/include/linux/kref.h @@ -19,6 +19,7 @@ #include <linux/atomic.h> #include <linux/kernel.h> #include <linux/mutex.h> +#include <linux/spinlock.h> struct kref { atomic_t refcount; @@ -98,6 +99,38 @@ static inline int kref_put(struct kref *kref, void (*release)(struct kref *kref) return kref_sub(kref, 1, release); } +/** + * kref_put_spinlock_irqsave - decrement refcount for object. + * @kref: object. + * @release: pointer to the function that will clean up the object when the + * last reference to the object is released. + * This pointer is required, and it is not acceptable to pass kfree + * in as this function. + * @lock: lock to take in release case + * + * Behaves identical to kref_put with one exception. If the reference count + * drops to zero, the lock will be taken atomically wrt dropping the reference + * count. The release function has to call spin_unlock() without _irqrestore. + */ +static inline int kref_put_spinlock_irqsave(struct kref *kref, + void (*release)(struct kref *kref), + spinlock_t *lock) +{ + unsigned long flags; + + WARN_ON(release == NULL); + if (atomic_add_unless(&kref->refcount, -1, 1)) + return 0; + spin_lock_irqsave(lock, flags); + if (atomic_dec_and_test(&kref->refcount)) { + release(kref); + local_irq_restore(flags); + return 1; + } + spin_unlock_irqrestore(lock, flags); + return 0; +} + static inline int kref_put_mutex(struct kref *kref, void (*release)(struct kref *kref), struct mutex *lock) diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h index c4af592f7057..e773dfa5f98f 100644 --- a/include/target/target_core_base.h +++ b/include/target/target_core_base.h @@ -463,7 +463,6 @@ struct se_cmd { #define CMD_T_ABORTED (1 << 0) #define CMD_T_ACTIVE (1 << 1) #define CMD_T_COMPLETE (1 << 2) -#define CMD_T_QUEUED (1 << 3) #define CMD_T_SENT (1 << 4) #define CMD_T_STOP (1 << 5) #define CMD_T_FAILED (1 << 6) @@ -572,12 +571,8 @@ struct se_dev_entry { bool def_pr_registered; /* See transport_lunflags_table */ u32 lun_flags; - u32 deve_cmds; u32 mapped_lun; - u32 average_bytes; - u32 last_byte_count; u32 total_cmds; - u32 total_bytes; u64 pr_res_key; u64 creation_time; u32 attach_count; |