block: use blk_op_str() in blk-mq-debugfs.c

Now that we've a helper function blk_op_str() to convert the
REQ_OP_XXX to string XXX, adjust the code to use that. Get rid of
the duplicate array op_name which is now present in the blk-core.c
which we renamed it to "blk_op_name" and open coding in the
blk-mq-debugfs.c.

Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/block/blk-mq-debugfs.c b/block/blk-mq-debugfs.c
index a8376cc..748164f 100644 (file)
--- a/block/blk-mq-debugfs.c
+++ b/block/blk-mq-debugfs.c
@@ -261,23 +261,6 @@ static int hctx_flags_show(void *data, struct seq_file *m)
        return 0;
 }
 
-#define REQ_OP_NAME(name) [REQ_OP_##name] = #name
-static const char *const op_name[] = {
-       REQ_OP_NAME(READ),
-       REQ_OP_NAME(WRITE),
-       REQ_OP_NAME(FLUSH),
-       REQ_OP_NAME(DISCARD),
-       REQ_OP_NAME(SECURE_ERASE),
-       REQ_OP_NAME(ZONE_RESET),
-       REQ_OP_NAME(WRITE_SAME),
-       REQ_OP_NAME(WRITE_ZEROES),
-       REQ_OP_NAME(SCSI_IN),
-       REQ_OP_NAME(SCSI_OUT),
-       REQ_OP_NAME(DRV_IN),
-       REQ_OP_NAME(DRV_OUT),
-};
-#undef REQ_OP_NAME
-
 #define CMD_FLAG_NAME(name) [__REQ_##name] = #name
 static const char *const cmd_flag_name[] = {
        CMD_FLAG_NAME(FAILFAST_DEV),
@@ -342,12 +325,13 @@ int __blk_mq_debugfs_rq_show(struct seq_file *m, struct request *rq)
 {
        const struct blk_mq_ops *const mq_ops = rq->q->mq_ops;
        const unsigned int op = req_op(rq);
+       const char *op_str = blk_op_str(op);
 
        seq_printf(m, "%p {.op=", rq);
-       if (op < ARRAY_SIZE(op_name) && op_name[op])
-               seq_printf(m, "%s", op_name[op]);
-       else
+       if (strcmp(op_str, "UNKNOWN") == 0)
                seq_printf(m, "%u", op);
+       else
+               seq_printf(m, "%s", op_str);
        seq_puts(m, ", .cmd_flags=");
        blk_flags_show(m, rq->cmd_flags & ~REQ_OP_MASK, cmd_flag_name,
                       ARRAY_SIZE(cmd_flag_name));