ARM: SAMSUNG: Fix build warnings because of unused codes

[net-next-2.6.git] / block / blk-merge.c

diff --git a/block/blk-merge.c b/block/blk-merge.c
index 4852475521ea911689be649166b8f592684cb2c6..eafc94f68d79f2ceb1c0a89fce8e449c3a5ff3f6 100644 (file)
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -12,7 +12,6 @@
 static unsigned int __blk_recalc_rq_segments(struct request_queue *q,
                                             struct bio *bio)
 {
-       unsigned int phys_size;
        struct bio_vec *bv, *bvprv = NULL;
        int cluster, i, high, highprv = 1;
        unsigned int seg_size, nr_phys_segs;
@@ -24,7 +23,7 @@ static unsigned int __blk_recalc_rq_segments(struct request_queue *q,
        fbio = bio;
        cluster = test_bit(QUEUE_FLAG_CLUSTER, &q->queue_flags);
        seg_size = 0;
-       phys_size = nr_phys_segs = 0;
+       nr_phys_segs = 0;
        for_each_bio(bio) {
                bio_for_each_segment(bv, bio, i) {
                        /*
@@ -362,6 +361,18 @@ static int attempt_merge(struct request_queue *q, struct request *req,
        if (!rq_mergeable(req) || !rq_mergeable(next))
                return 0;
 
+       /*
+        * Don't merge file system requests and discard requests
+        */
+       if ((req->cmd_flags & REQ_DISCARD) != (next->cmd_flags & REQ_DISCARD))
+               return 0;
+
+       /*
+        * Don't merge discard requests and secure discard requests
+        */
+       if ((req->cmd_flags & REQ_SECURE) != (next->cmd_flags & REQ_SECURE))
+               return 0;
+
        /*
         * not contiguous
         */