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Linux 4.7 compat: replace blk_queue_flush with blk_queue_write_cache

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Signed-off-by: Chunwei Chen <david.chen@osnexus.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #4665
This commit is contained in:
Chunwei Chen
2016-05-18 13:45:39 -07:00
committed by Brian Behlendorf
parent fd4c7b7a73
commit 68e8f59afb
3 changed files with 77 additions and 9 deletions
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include/linux/blkdev_compat.h
+27
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@@ -52,6 +52,33 @@ __blk_queue_flush(struct request_queue *q, unsigned int flags)
q->flush_flags = flags & (REQ_FLUSH | REQ_FUA);
}
#endif /* HAVE_BLK_QUEUE_FLUSH && HAVE_BLK_QUEUE_FLUSH_GPL_ONLY */
/*
* 4.7 API change,
* The blk_queue_write_cache() interface has replaced blk_queue_flush()
* interface. However, while the new interface is GPL-only. Thus if the
* GPL-only version is detected we implement our own trivial helper
* compatibility funcion.
*/
#if defined(HAVE_BLK_QUEUE_WRITE_CACHE) && \
defined(HAVE_BLK_QUEUE_WRITE_CACHE_GPL_ONLY)
#define blk_queue_write_cache __blk_queue_write_cache
static inline void
__blk_queue_write_cache(struct request_queue *q, bool wc, bool fua)
{
spin_lock_irq(q->queue_lock);
if (wc)
queue_flag_set(QUEUE_FLAG_WC, q);
else
queue_flag_clear(QUEUE_FLAG_WC, q);
if (fua)
queue_flag_set(QUEUE_FLAG_FUA, q);
else
queue_flag_clear(QUEUE_FLAG_FUA, q);
spin_unlock_irq(q->queue_lock);
}
#endif
/*
* Most of the blk_* macros were removed in 2.6.36. Ostensibly this was
* done to improve readability and allow easier grepping. However, from