block: remove wrappers for request type/flags

Remove all the trivial wrappers for the cmd_type and cmd_flags fields in
struct requests.  This allows much easier grepping for different request
types instead of unwinding through macros.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c
index 638711c..4f14994 100644
--- a/kernel/trace/blktrace.c
+++ b/kernel/trace/blktrace.c
@@ -661,10 +661,10 @@
 	if (likely(!bt))
 		return;
 
-	if (blk_discard_rq(rq))
+	if (rq->cmd_flags & REQ_DISCARD)
 		rw |= (1 << BIO_RW_DISCARD);
 
-	if (blk_pc_request(rq)) {
+	if (rq->cmd_type == REQ_TYPE_BLOCK_PC) {
 		what |= BLK_TC_ACT(BLK_TC_PC);
 		__blk_add_trace(bt, 0, blk_rq_bytes(rq), rw,
 				what, rq->errors, rq->cmd_len, rq->cmd);
@@ -925,7 +925,7 @@
 	if (likely(!bt))
 		return;
 
-	if (blk_pc_request(rq))
+	if (rq->cmd_type == REQ_TYPE_BLOCK_PC)
 		__blk_add_trace(bt, 0, blk_rq_bytes(rq), 0,
 				BLK_TA_DRV_DATA, rq->errors, len, data);
 	else
@@ -1730,7 +1730,7 @@
 	int len = rq->cmd_len;
 	unsigned char *cmd = rq->cmd;
 
-	if (!blk_pc_request(rq)) {
+	if (rq->cmd_type != REQ_TYPE_BLOCK_PC) {
 		buf[0] = '\0';
 		return;
 	}
@@ -1779,7 +1779,7 @@
 	int rw = rq->cmd_flags & 0x03;
 	int bytes;
 
-	if (blk_discard_rq(rq))
+	if (rq->cmd_flags & REQ_DISCARD)
 		rw |= (1 << BIO_RW_DISCARD);
 
 	bytes = blk_rq_bytes(rq);