kfifo: provide noirqsave variants of spinlocked in and out helpers
Provide variants of spinlocked kfifo_in() and kfifo_out() routines which don't disable interrupts. Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Acked-by: Stefani Seibold <stefani@seibold.net>
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@ -517,6 +517,26 @@ __kfifo_uint_must_check_helper( \
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__ret; \
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})
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/**
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* kfifo_in_spinlocked_noirqsave - put data into fifo using a spinlock for
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* locking, don't disable interrupts
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* @fifo: address of the fifo to be used
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* @buf: the data to be added
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* @n: number of elements to be added
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* @lock: pointer to the spinlock to use for locking
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*
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* This is a variant of kfifo_in_spinlocked() but uses spin_lock/unlock()
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* for locking and doesn't disable interrupts.
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*/
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#define kfifo_in_spinlocked_noirqsave(fifo, buf, n, lock) \
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({ \
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unsigned int __ret; \
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spin_lock(lock); \
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__ret = kfifo_in(fifo, buf, n); \
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spin_unlock(lock); \
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__ret; \
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})
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/* alias for kfifo_in_spinlocked, will be removed in a future release */
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#define kfifo_in_locked(fifo, buf, n, lock) \
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kfifo_in_spinlocked(fifo, buf, n, lock)
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@ -569,6 +589,28 @@ __kfifo_uint_must_check_helper( \
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}) \
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)
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/**
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* kfifo_out_spinlocked_noirqsave - get data from the fifo using a spinlock
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* for locking, don't disable interrupts
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* @fifo: address of the fifo to be used
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* @buf: pointer to the storage buffer
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* @n: max. number of elements to get
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* @lock: pointer to the spinlock to use for locking
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*
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* This is a variant of kfifo_out_spinlocked() which uses spin_lock/unlock()
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* for locking and doesn't disable interrupts.
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*/
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#define kfifo_out_spinlocked_noirqsave(fifo, buf, n, lock) \
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__kfifo_uint_must_check_helper( \
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({ \
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unsigned int __ret; \
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spin_lock(lock); \
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__ret = kfifo_out(fifo, buf, n); \
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spin_unlock(lock); \
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__ret; \
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}) \
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)
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/* alias for kfifo_out_spinlocked, will be removed in a future release */
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#define kfifo_out_locked(fifo, buf, n, lock) \
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kfifo_out_spinlocked(fifo, buf, n, lock)
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