linux-kernel - [PATCH 04/23] lightnvm: do not protect block 0

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Message-Id: <20161128213914.12516-5-m@bjorling.me>
Date:   Mon, 28 Nov 2016 22:38:55 +0100
From:   Matias Bjørling <m@...rling.me>
To:     linux-block@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     axboe@...com, Javier González <jg@...htnvm.io>,
        Javier González <javier@...xlabs.com>,
        Matias Bjørling <m@...rling.me>
Subject: [PATCH 04/23] lightnvm: do not protect block 0

From: Javier González <jg@...htnvm.io>

Device blocks should be marked by the device and considered as bad
blocks by the media manager. Thus, do not make assumptions on which
blocks are going to be used by the device. In doing so we might lose
valid blocks from the free list.

Signed-off-by: Javier González <javier@...xlabs.com>
Signed-off-by: Matias Bjørling <m@...rling.me>
---
 drivers/lightnvm/gennvm.c | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/drivers/lightnvm/gennvm.c b/drivers/lightnvm/gennvm.c
index 730d736..a7e17fa 100644
--- a/drivers/lightnvm/gennvm.c
+++ b/drivers/lightnvm/gennvm.c
@@ -371,12 +371,6 @@ static int gen_blocks_init(struct nvm_dev *dev, struct gen_dev *gn)
 			block->lun = &lun->vlun;
 			block->id = cur_block_id++;
 
-			/* First block is reserved for device */
-			if (unlikely(lun_iter == 0 && blk_iter == 0)) {
-				lun->vlun.nr_free_blocks--;
-				continue;
-			}
-
 			list_add_tail(&block->list, &lun->free_list);
 		}
 
-- 
2.9.3