Merge branch 'master' into for-next

[safe/jmp/linux-2.6] / block / blk-core.c

diff --git a/block/blk-core.c b/block/blk-core.c
index 02a9252..4b45435 100644 (file)
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -26,24 +26,15 @@
 #include <linux/swap.h>
 #include <linux/writeback.h>
 #include <linux/task_io_accounting_ops.h>
-#include <linux/blktrace_api.h>
 #include <linux/fault-inject.h>
-#include <trace/block.h>
+
+#define CREATE_TRACE_POINTS
+#include <trace/events/block.h>
 
 #include "blk.h"
 
-DEFINE_TRACE(block_plug);
-DEFINE_TRACE(block_unplug_io);
-DEFINE_TRACE(block_unplug_timer);
-DEFINE_TRACE(block_getrq);
-DEFINE_TRACE(block_sleeprq);
-DEFINE_TRACE(block_rq_requeue);
-DEFINE_TRACE(block_bio_backmerge);
-DEFINE_TRACE(block_bio_frontmerge);
-DEFINE_TRACE(block_bio_queue);
-DEFINE_TRACE(block_rq_complete);
-DEFINE_TRACE(block_remap);     /* Also used in drivers/md/dm.c */
 EXPORT_TRACEPOINT_SYMBOL_GPL(block_remap);
+EXPORT_TRACEPOINT_SYMBOL_GPL(block_bio_complete);
 
 static int __make_request(struct request_queue *q, struct bio *bio);
 
@@ -506,6 +497,11 @@ struct request_queue *blk_alloc_queue_node(gfp_t gfp_mask, int node_id)
 
        q->backing_dev_info.unplug_io_fn = blk_backing_dev_unplug;
        q->backing_dev_info.unplug_io_data = q;
+       q->backing_dev_info.ra_pages =
+                       (VM_MAX_READAHEAD * 1024) / PAGE_CACHE_SIZE;
+       q->backing_dev_info.state = 0;
+       q->backing_dev_info.capabilities = BDI_CAP_MAP_COPY;
+
        err = bdi_init(&q->backing_dev_info);
        if (err) {
                kmem_cache_free(blk_requestq_cachep, q);
@@ -599,8 +595,6 @@ blk_init_queue_node(request_fn_proc *rfn, spinlock_t *lock, int node_id)
 
        q->sg_reserved_size = INT_MAX;
 
-       blk_set_cmd_filter_defaults(&q->cmd_filter);
-
        /*
         * all done
         */
@@ -892,9 +886,10 @@ EXPORT_SYMBOL(blk_get_request);
 
 /**
  * blk_make_request - given a bio, allocate a corresponding struct request.
- *
+ * @q: target request queue
  * @bio:  The bio describing the memory mappings that will be submitted for IO.
  *        It may be a chained-bio properly constructed by block/bio layer.
+ * @gfp_mask: gfp flags to be used for memory allocation
  *
  * blk_make_request is the parallel of generic_make_request for BLOCK_PC
  * type commands. Where the struct request needs to be farther initialized by
@@ -1175,6 +1170,11 @@ static int __make_request(struct request_queue *q, struct bio *bio)
        const int unplug = bio_unplug(bio);
        int rw_flags;
 
+       if (bio_barrier(bio) && bio_has_data(bio) &&
+           (q->next_ordered == QUEUE_ORDERED_NONE)) {
+               bio_endio(bio, -EOPNOTSUPP);
+               return 0;
+       }
        /*
         * low level driver can indicate that it wants pages above a
         * certain limit bounced to low memory (ie for highmem, or even
@@ -1292,7 +1292,7 @@ static inline void blk_partition_remap(struct bio *bio)
                bio->bi_bdev = bdev->bd_contains;
 
                trace_block_remap(bdev_get_queue(bio->bi_bdev), bio,
-                                   bdev->bd_dev, bio->bi_sector,
+                                   bdev->bd_dev,
                                    bio->bi_sector - p->start_sect);
        }
 }
@@ -1461,8 +1461,7 @@ static inline void __generic_make_request(struct bio *bio)
                        goto end_io;
 
                if (old_sector != -1)
-                       trace_block_remap(q, bio, old_dev, bio->bi_sector,
-                                           old_sector);
+                       trace_block_remap(q, bio, old_dev, old_sector);
 
                trace_block_bio_queue(q, bio);
 
@@ -1476,11 +1475,6 @@ static inline void __generic_make_request(struct bio *bio)
                        err = -EOPNOTSUPP;
                        goto end_io;
                }
-               if (bio_barrier(bio) && bio_has_data(bio) &&
-                   (q->next_ordered == QUEUE_ORDERED_NONE)) {
-                       err = -EOPNOTSUPP;
-                       goto end_io;
-               }
 
                ret = q->make_request_fn(q, bio);
        } while (ret);
@@ -1881,14 +1875,14 @@ EXPORT_SYMBOL(blk_fetch_request);
 
 /**
  * blk_update_request - Special helper function for request stacking drivers
- * @rq:              the request being processed
+ * @req:      the request being processed
  * @error:    %0 for success, < %0 for error
- * @nr_bytes: number of bytes to complete @rq
+ * @nr_bytes: number of bytes to complete @req
  *
  * Description:
- *     Ends I/O on a number of bytes attached to @rq, but doesn't complete
- *     the request structure even if @rq doesn't have leftover.
- *     If @rq has leftover, sets it up for the next range of segments.
+ *     Ends I/O on a number of bytes attached to @req, but doesn't complete
+ *     the request structure even if @req doesn't have leftover.
+ *     If @req has leftover, sets it up for the next range of segments.
  *
  *     This special helper function is only for request stacking drivers
  *     (e.g. request-based dm) so that they can handle partial completion.
@@ -2154,7 +2148,7 @@ EXPORT_SYMBOL_GPL(blk_end_request);
 /**
  * blk_end_request_all - Helper function for drives to finish the request.
  * @rq: the request to finish
- * @err: %0 for success, < %0 for error
+ * @error: %0 for success, < %0 for error
  *
  * Description:
  *     Completely finish @rq.
@@ -2175,7 +2169,7 @@ EXPORT_SYMBOL_GPL(blk_end_request_all);
 /**
  * blk_end_request_cur - Helper function to finish the current request chunk.
  * @rq: the request to finish the current chunk for
- * @err: %0 for success, < %0 for error
+ * @error: %0 for success, < %0 for error
  *
  * Description:
  *     Complete the current consecutively mapped chunk from @rq.
@@ -2212,7 +2206,7 @@ EXPORT_SYMBOL_GPL(__blk_end_request);
 /**
  * __blk_end_request_all - Helper function for drives to finish the request.
  * @rq: the request to finish
- * @err: %0 for success, < %0 for error
+ * @error: %0 for success, < %0 for error
  *
  * Description:
  *     Completely finish @rq.  Must be called with queue lock held.
@@ -2233,7 +2227,7 @@ EXPORT_SYMBOL_GPL(__blk_end_request_all);
 /**
  * __blk_end_request_cur - Helper function to finish the current request chunk.
  * @rq: the request to finish the current chunk for
- * @err: %0 for success, < %0 for error
+ * @error: %0 for success, < %0 for error
  *
  * Description:
  *     Complete the current consecutively mapped chunk from @rq.  Must
@@ -2369,7 +2363,7 @@ int blk_rq_prep_clone(struct request *rq, struct request *rq_src,
                __bio_clone(bio, bio_src);
 
                if (bio_integrity(bio_src) &&
-                   bio_integrity_clone(bio, bio_src, gfp_mask))
+                   bio_integrity_clone(bio, bio_src, gfp_mask, bs))
                        goto free_and_out;
 
                if (bio_ctr && bio_ctr(bio, bio_src, data))