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authorLinus Torvalds <torvalds@linux-foundation.org>2015-11-04 20:51:48 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2015-11-04 20:51:48 -0800
commit527d1529e38b36fd22e65711b653ab773179d9e8 (patch)
tree46ad2d22dd4af60634fc8e5e2f9980e3af1eb7f2 /block/blk.h
parenteffa04cc5a31b3f12cda6025ab93460f1f0e454e (diff)
parent4125a09b0a0d579ebace17f0e62b03ab9d5ab2f4 (diff)
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Merge branch 'for-4.4/integrity' of git://git.kernel.dk/linux-block
Pull block integrity updates from Jens Axboe: ""This is the joint work of Dan and Martin, cleaning up and improving the support for block data integrity" * 'for-4.4/integrity' of git://git.kernel.dk/linux-block: block, libnvdimm, nvme: provide a built-in blk_integrity nop profile block: blk_flush_integrity() for bio-based drivers block: move blk_integrity to request_queue block: generic request_queue reference counting nvme: suspend i/o during runtime blk_integrity_unregister md: suspend i/o during runtime blk_integrity_unregister md, dm, scsi, nvme, libnvdimm: drop blk_integrity_unregister() at shutdown block: Inline blk_integrity in struct gendisk block: Export integrity data interval size in sysfs block: Reduce the size of struct blk_integrity block: Consolidate static integrity profile properties block: Move integrity kobject to struct gendisk
Diffstat (limited to 'block/blk.h')
-rw-r--r--block/blk.h22
1 files changed, 22 insertions, 0 deletions
diff --git a/block/blk.h b/block/blk.h
index aa27d0292af1..da722eb786df 100644
--- a/block/blk.h
+++ b/block/blk.h
@@ -72,6 +72,28 @@ void blk_dequeue_request(struct request *rq);
void __blk_queue_free_tags(struct request_queue *q);
bool __blk_end_bidi_request(struct request *rq, int error,
unsigned int nr_bytes, unsigned int bidi_bytes);
+int blk_queue_enter(struct request_queue *q, gfp_t gfp);
+void blk_queue_exit(struct request_queue *q);
+void blk_freeze_queue(struct request_queue *q);
+
+static inline void blk_queue_enter_live(struct request_queue *q)
+{
+ /*
+ * Given that running in generic_make_request() context
+ * guarantees that a live reference against q_usage_counter has
+ * been established, further references under that same context
+ * need not check that the queue has been frozen (marked dead).
+ */
+ percpu_ref_get(&q->q_usage_counter);
+}
+
+#ifdef CONFIG_BLK_DEV_INTEGRITY
+void blk_flush_integrity(void);
+#else
+static inline void blk_flush_integrity(void)
+{
+}
+#endif
void blk_rq_timed_out_timer(unsigned long data);
unsigned long blk_rq_timeout(unsigned long timeout);