Re: [PATCH 2/5 v2] blk-mq: Support for Open-Channel SSDs

From: Matias BjÃrling
Date: Thu Apr 16 2015 - 06:23:27 EST


On 04/16/2015 11:10 AM, Paul Bolle wrote:
A few things I spotted (while actually fiddling with 3/5).

Thanks. I'll fix them up.


On Wed, 2015-04-15 at 14:34 +0200, Matias BjÃrling wrote:
index f3dd028..58a8a71 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -221,6 +221,9 @@ static void blk_mq_rq_ctx_init(struct request_queue *q, struct blk_mq_ctx *ctx,
rq->end_io = NULL;
rq->end_io_data = NULL;
rq->next_rq = NULL;
+#if CONFIG_BLK_DEV_NVM

I think you meant
#ifdef CONFIG_BLK_DEV_NVM

+ rq->phys_sector = 0;
+#endif

ctx->rq_dispatched[rw_is_sync(rw_flags)]++;
}

--- /dev/null
+++ b/block/blk-nvm.c

+int nvm_register_target(struct nvm_target_type *tt)
+{
+ int ret = 0;
+
+ down_write(&_lock);
+ if (nvm_find_target_type(tt->name))
+ ret = -EEXIST;
+ else
+ list_add(&tt->list, &_targets);
+ up_write(&_lock);
+
+ return ret;
+}
+
+void nvm_unregister_target(struct nvm_target_type *tt)
+{
+ if (!tt)
+ return;
+
+ down_write(&_lock);
+ list_del(&tt->list);
+ up_write(&_lock);
+}

Trying to build rrpc.ko I saw this
WARNING: "nvm_unregister_target" [[...]/drivers/lightnvm/rrpc.ko] undefined!
WARNING: "nvm_register_target" [[...]/drivers/lightnvm/rrpc.ko] undefined!

So I guess you need to export these two functions too.

--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -209,6 +209,9 @@ struct request {

/* for bidi */
struct request *next_rq;
+#if CONFIG_BLK_DEV_NVM

Again, I think
#ifdef CONFIG_BLK_DEV_NVM

+ sector_t phys_sector;
+#endif
};

static inline unsigned short req_get_ioprio(struct request *req)


Paul Bolle

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