Re: [PATCH 2/3] mg_disk: fix CONFIG_LBD=y warning

From: Jeff Garzik
Date: Tue Apr 28 2009 - 14:10:25 EST


Bartlomiej Zolnierkiewicz wrote:
On Tuesday 28 April 2009 17:19:34 Mark Lord wrote:
Tejun Heo wrote:
From: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx>

drivers/block/mg_disk.c: In function âmg_dump_statusâ:
drivers/block/mg_disk.c:265: warning: format â%ldâ expects type âlong intâ, but
argument 2 has type âsector_tâ

[ Impact: kill build warning ]

Cc: unsik Kim <donari75@xxxxxxxxx>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx>
Signed-off-by: Tejun Heo <tj@xxxxxxxxxx>
---
drivers/block/mg_disk.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/block/mg_disk.c b/drivers/block/mg_disk.c
index d3e72ad..f389835 100644
--- a/drivers/block/mg_disk.c
+++ b/drivers/block/mg_disk.c
@@ -79,7 +79,7 @@ static void mg_dump_status(const char *msg, unsigned int stat,
if (host->breq) {
req = elv_next_request(host->breq);
if (req)
- printk(", sector=%ld", req->sector);
+ printk(", sector=%u", (u32)req->sector);
..

Eh? Shouldn't that be fixed the other way around, like this:

+ printk(", sector=%llu", (u64)req->sector);

This way, it will still give correct data when sector_t is a u64.

shouldn't matter, req->sector is never > u32 for mg_disk

It never matters... until the code gets copied elsewhere. IMO wrong code should never be kept -- "impossible to hit" just means it is low priority :)

Jeff



--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/