drop vmerge accounting

[linux-2.6-omap-h63xx.git] / block / blk-merge.c

diff --git a/block/blk-merge.c b/block/blk-merge.c
index 2c2a2ee716eca99937cbe1a93e90f6cf939eb287..d81d91419ff561be9b06afd61fd419df27e2ba77 100644 (file)
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -41,12 +41,9 @@ void blk_recalc_rq_sectors(struct request *rq, int nsect)
 void blk_recalc_rq_segments(struct request *rq)
 {
        int nr_phys_segs;
-       int nr_hw_segs;
        unsigned int phys_size;
-       unsigned int hw_size;
        struct bio_vec *bv, *bvprv = NULL;
        int seg_size;
-       int hw_seg_size;
        int cluster;
        struct req_iterator iter;
        int high, highprv = 1;
@@ -56,8 +53,8 @@ void blk_recalc_rq_segments(struct request *rq)
                return;
 
        cluster = test_bit(QUEUE_FLAG_CLUSTER, &q->queue_flags);
-       hw_seg_size = seg_size = 0;
-       phys_size = hw_size = nr_phys_segs = nr_hw_segs = 0;
+       seg_size = 0;
+       phys_size = nr_phys_segs = 0;
        rq_for_each_segment(bv, rq, iter) {
                /*
                 * the trick here is making sure that a high page is never
@@ -76,30 +73,17 @@ void blk_recalc_rq_segments(struct request *rq)
                                goto new_segment;
 
                        seg_size += bv->bv_len;
-                       hw_seg_size += bv->bv_len;
                        bvprv = bv;
                        continue;
                }
 new_segment:
-               if (nr_hw_segs == 1 &&
-                   hw_seg_size > rq->bio->bi_hw_front_size)
-                       rq->bio->bi_hw_front_size = hw_seg_size;
-               hw_seg_size = bv->bv_len;
-               nr_hw_segs++;
-
                nr_phys_segs++;
                bvprv = bv;
                seg_size = bv->bv_len;
                highprv = high;
        }
 
-       if (nr_hw_segs == 1 &&
-           hw_seg_size > rq->bio->bi_hw_front_size)
-               rq->bio->bi_hw_front_size = hw_seg_size;
-       if (hw_seg_size > rq->biotail->bi_hw_back_size)
-               rq->biotail->bi_hw_back_size = hw_seg_size;
        rq->nr_phys_segments = nr_phys_segs;
-       rq->nr_hw_segments = nr_hw_segs;
 }
 
 void blk_recount_segments(struct request_queue *q, struct bio *bio)
@@ -112,7 +96,6 @@ void blk_recount_segments(struct request_queue *q, struct bio *bio)
        blk_recalc_rq_segments(&rq);
        bio->bi_next = nxt;
        bio->bi_phys_segments = rq.nr_phys_segments;
-       bio->bi_hw_segments = rq.nr_hw_segments;
        bio->bi_flags |= (1 << BIO_SEG_VALID);
 }
 EXPORT_SYMBOL(blk_recount_segments);
@@ -255,10 +238,9 @@ static inline int ll_new_hw_segment(struct request_queue *q,
                                    struct request *req,
                                    struct bio *bio)
 {
-       int nr_hw_segs = bio_hw_segments(q, bio);
        int nr_phys_segs = bio_phys_segments(q, bio);
 
-       if (req->nr_hw_segments + nr_hw_segs > q->max_hw_segments
+       if (req->nr_phys_segments + nr_phys_segs > q->max_hw_segments
            || req->nr_phys_segments + nr_phys_segs > q->max_phys_segments) {
                req->cmd_flags |= REQ_NOMERGE;
                if (req == q->last_merge)
@@ -270,7 +252,6 @@ static inline int ll_new_hw_segment(struct request_queue *q,
         * This will form the start of a new hw segment.  Bump both
         * counters.
         */
-       req->nr_hw_segments += nr_hw_segs;
        req->nr_phys_segments += nr_phys_segs;
        return 1;
 }
@@ -328,7 +309,6 @@ static int ll_merge_requests_fn(struct request_queue *q, struct request *req,
                                struct request *next)
 {
        int total_phys_segments;
-       int total_hw_segments;
 
        /*
         * First check if the either of the requests are re-queued
@@ -350,14 +330,11 @@ static int ll_merge_requests_fn(struct request_queue *q, struct request *req,
        if (total_phys_segments > q->max_phys_segments)
                return 0;
 
-       total_hw_segments = req->nr_hw_segments + next->nr_hw_segments;
-
-       if (total_hw_segments > q->max_hw_segments)
+       if (total_phys_segments > q->max_hw_segments)
                return 0;
 
        /* Merge is OK... */
        req->nr_phys_segments = total_phys_segments;
-       req->nr_hw_segments = total_hw_segments;
        return 1;
 }