linux-kernel - [PATCH] lightnvm: assume 64-bit lba numbers

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Message-Id: <20170419173931.3902058-1-arnd@arndb.de>
Date:   Wed, 19 Apr 2017 19:39:13 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Matias Bjorling <mb@...htnvm.io>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Matias Bjørling <matias@...xlabs.com>,
        Javier González <jg@...htnvm.io>,
        Jens Axboe <axboe@...com>, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] lightnvm: assume 64-bit lba numbers

The driver uses both u64 and sector_t to refer to offsets, and assigns between the
two. This causes one harmless warning when sector_t is 32-bit:

drivers/lightnvm/pblk-rb.c: In function 'pblk_rb_write_entry_gc':
include/linux/lightnvm.h:215:20: error: large integer implicitly truncated to unsigned type [-Werror=overflow]
drivers/lightnvm/pblk-rb.c:324:22: note: in expansion of macro 'ADDR_EMPTY'

As the driver is already doing this inconsistently, changing the type
won't make it worse and is an easy way to avoid the warning.

Fixes: a4bd217b4326 ("lightnvm: physical block device (pblk) target")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/lightnvm/pblk.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/lightnvm/pblk.h b/drivers/lightnvm/pblk.h
index c82120ce3be5..11ed7d83f572 100644
--- a/drivers/lightnvm/pblk.h
+++ b/drivers/lightnvm/pblk.h
@@ -119,7 +119,7 @@ struct pblk_w_ctx {
 	struct bio_list bios;		/* Original bios - used for completion
 					 * in REQ_FUA, REQ_FLUSH case
 					 */
-	sector_t lba;			/* Logic addr. associated with entry */
+	u64 lba;			/* Logic addr. associated with entry */
 	struct ppa_addr ppa;		/* Physic addr. associated with entry */
 	int flags;			/* Write context flags */
 };
-- 
2.9.0