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block: kill blk_queue_flush()

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We don't have any drivers left using it, so kill it off. Update
documentation to use the newer blk_queue_write_cache().

Signed-off-by: Jens Axboe <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
This commit is contained in:
Jens Axboe 2016-03-30 10:19:30 -06:00
commit 2245f6de6c
3 changed files with 2 additions and 23 deletions
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20
block/blk-settings.c
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@ -820,26 +820,6 @@ void blk_queue_update_dma_alignment(struct request_queue *q, int mask)
}
EXPORT_SYMBOL(blk_queue_update_dma_alignment);
/**
* blk_queue_flush - configure queue's cache flush capability
* @q: the request queue for the device
* @flush: 0, REQ_FLUSH or REQ_FLUSH | REQ_FUA
*
* Tell block layer cache flush capability of @q. If it supports
* flushing, REQ_FLUSH should be set. If it supports bypassing
* write cache for individual writes, REQ_FUA should be set.
*/
void blk_queue_flush(struct request_queue *q, unsigned int flush)
{
WARN_ON_ONCE(flush & ~(REQ_FLUSH | REQ_FUA));
if (WARN_ON_ONCE(!(flush & REQ_FLUSH) && (flush & REQ_FUA)))
flush &= ~REQ_FUA;
q->flush_flags = flush & (REQ_FLUSH | REQ_FUA);
}
EXPORT_SYMBOL_GPL(blk_queue_flush);
void blk_queue_flush_queueable(struct request_queue *q, bool queueable)
{
q->flush_not_queueable = !queueable;