On Fri, Mar 07 2014 at 6:57am -0500,
Jim Davis <jim.epost@xxxxxxxxx> wrote:
> Building with the attached random configuration file,
>
> LD init/built-in.o
> drivers/built-in.o: In function `do_work':
> dm-era-target.c:(.text+0x7304ea): undefined reference to `__udivdi3'
> drivers/built-in.o: In function `era_map':
> dm-era-target.c:(.text+0x730759): undefined reference to `__udivdi3'
> make: *** [vmlinux] Error 1
Thanks for the report. This patch will fix it (I'll fold it into the
"dm era: support non power-of-2 blocksize" commit now):
>From 342553076366eac8b1718488045f710cd935636f Mon Sep 17 00:00:00 2001
From: Mike Snitzer <snitzer@xxxxxxxxxx>
Date: Fri, 7 Mar 2014 08:47:56 -0500
Subject: [PATCH] dm era: fix 64 bit divide on 32 bit
LD init/built-in.o
drivers/built-in.o: In function `do_work':
dm-era-target.c:(.text+0x7304ea): undefined reference to `__udivdi3'
drivers/built-in.o: In function `era_map':
dm-era-target.c:(.text+0x730759): undefined reference to `__udivdi3'
make: *** [vmlinux] Error 1
---
drivers/md/dm-era-target.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/drivers/md/dm-era-target.c b/drivers/md/dm-era-target.c
index d7bd7b3..3a72206 100644
--- a/drivers/md/dm-era-target.c
+++ b/drivers/md/dm-era-target.c
@@ -1120,7 +1120,7 @@ static bool block_size_is_power_of_two(struct era *era)
static dm_block_t get_block(struct era *era, struct bio *bio)
{
- dm_block_t block_nr = bio->bi_iter.bi_sector;
+ sector_t block_nr = bio->bi_iter.bi_sector;
if (!block_size_is_power_of_two(era))
(void) sector_div(block_nr, era->sectors_per_block);
--
1.7.1
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