bsg: setting rq->bio to NULL

[safe/jmp/linux-2.6] / block / blk.h

diff --git a/block/blk.h b/block/blk.h
index 59776ab..79c85f7 100644 (file)
--- a/block/blk.h
+++ b/block/blk.h
@@ -17,6 +17,43 @@ void __blk_queue_free_tags(struct request_queue *q);
 
 void blk_unplug_work(struct work_struct *work);
 void blk_unplug_timeout(unsigned long data);
+void blk_rq_timed_out_timer(unsigned long data);
+void blk_delete_timer(struct request *);
+void blk_add_timer(struct request *);
+void __generic_unplug_device(struct request_queue *);
+
+/*
+ * Internal atomic flags for request handling
+ */
+enum rq_atomic_flags {
+       REQ_ATOM_COMPLETE = 0,
+};
+
+/*
+ * EH timer and IO completion will both attempt to 'grab' the request, make
+ * sure that only one of them suceeds
+ */
+static inline int blk_mark_rq_complete(struct request *rq)
+{
+       return test_and_set_bit(REQ_ATOM_COMPLETE, &rq->atomic_flags);
+}
+
+static inline void blk_clear_rq_complete(struct request *rq)
+{
+       clear_bit(REQ_ATOM_COMPLETE, &rq->atomic_flags);
+}
+
+#ifdef CONFIG_FAIL_IO_TIMEOUT
+int blk_should_fake_timeout(struct request_queue *);
+ssize_t part_timeout_show(struct device *, struct device_attribute *, char *);
+ssize_t part_timeout_store(struct device *, struct device_attribute *,
+                               const char *, size_t);
+#else
+static inline int blk_should_fake_timeout(struct request_queue *q)
+{
+       return 0;
+}
+#endif
 
 struct io_context *current_io_context(gfp_t gfp_flags, int node);
 
@@ -33,6 +70,10 @@ void blk_queue_congestion_threshold(struct request_queue *q);
 
 int blk_dev_init(void);
 
+void elv_quiesce_start(struct request_queue *q);
+void elv_quiesce_end(struct request_queue *q);
+
+
 /*
  * Return the threshold (number of used requests) at which the queue is
  * considered to be congested.  It include a little hysteresis to keep the
@@ -51,4 +92,29 @@ static inline int queue_congestion_off_threshold(struct request_queue *q)
        return q->nr_congestion_off;
 }
 
+#if defined(CONFIG_BLK_DEV_INTEGRITY)
+
+#define rq_for_each_integrity_segment(bvl, _rq, _iter)         \
+       __rq_for_each_bio(_iter.bio, _rq)                       \
+               bip_for_each_vec(bvl, _iter.bio->bi_integrity, _iter.i)
+
+#endif /* BLK_DEV_INTEGRITY */
+
+static inline int blk_cpu_to_group(int cpu)
+{
+#ifdef CONFIG_SCHED_MC
+       const struct cpumask *mask = cpu_coregroup_mask(cpu);
+       return cpumask_first(mask);
+#elif defined(CONFIG_SCHED_SMT)
+       return cpumask_first(topology_thread_cpumask(cpu));
+#else
+       return cpu;
+#endif
+}
+
+static inline int blk_do_io_stat(struct request *rq)
+{
+       return rq->rq_disk && blk_rq_io_stat(rq);
+}
+
 #endif