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kref: Remove kref_put_spinlock_irqsave()

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The last user is gone. Hence remove this function.

Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Joern Engel <joern@logfs.org>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Bart Van Assche
2015-10-22 16:02:14 -07:00
committed by Nicholas Bellinger
parent 9ff9d15edd
commit 3a66d7dca1
1 changed files with 0 additions and 33 deletions
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33
include/linux/kref.h
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@@ -19,7 +19,6 @@
#include <linux/atomic.h> #include <linux/atomic.h>
#include <linux/kernel.h> #include <linux/kernel.h>
#include <linux/mutex.h> #include <linux/mutex.h>
#include <linux/spinlock.h>
struct kref { struct kref {
atomic_t refcount; atomic_t refcount;
@@ -99,38 +98,6 @@ static inline int kref_put(struct kref *kref, void (*release)(struct kref *kref)
return kref_sub(kref, 1, release); 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, static inline int kref_put_mutex(struct kref *kref,
void (*release)(struct kref *kref), void (*release)(struct kref *kref),
struct mutex *lock) struct mutex *lock)