linux-kernel - Re: linux-next: Tree for Sept 17 (jfs)

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Date:	Mon, 17 Sep 2012 11:50:51 -0500
From:	Dave Kleikamp <dave.kleikamp@...cle.com>
To:	Randy Dunlap <rdunlap@...otime.net>
CC:	Stephen Rothwell <sfr@...b.auug.org.au>,
	linux-next@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
	Tino Reichardt <list-jfs@...ilk.de>
Subject: Re: linux-next: Tree for Sept 17 (jfs)

On 09/17/2012 10:46 AM, Randy Dunlap wrote:
> On 09/17/2012 04:59 AM, Stephen Rothwell wrote:
> 
>> Hi all,
>>
>> OK, so this was a bad one :-(
>>
>> Changes since 201209014:
>>
>> New tree: jfs
>>
> 
> 
> 
> on i386:
> 
> modular build:
> ERROR: "__divdi3" [fs/jfs/jfs.ko] undefined!
> 
> or builtin:
> fs/built-in.o: In function `dbDiscardAG':
> (.text+0x12988b): undefined reference to `__divdi3'

Thanks Randy.

This should fix it. I'll integrate it back into the proper patch in the
jfs tree for the next pull.

jfs: fix i386 build error. Replace 64-bit division with do_div()

Signed-off-by: Dave Kleikamp <dave.kleikamp@...cle.com>

diff --git a/fs/jfs/jfs_dmap.c b/fs/jfs/jfs_dmap.c
index eb988a9..174feb6 100644
--- a/fs/jfs/jfs_dmap.c
+++ b/fs/jfs/jfs_dmap.c
@@ -1640,13 +1640,15 @@ s64 dbDiscardAG(struct inode *ip, int agno, s64 minlen)
 	} *totrim, *tt;
 
 	/* max blkno / nblocks pairs to trim */
-	int count = 0, range_cnt = 32 * 1024;
+	int count = 0, range_cnt;
 
 	/* prevent others from writing new stuff here, while trimming */
 	IWRITE_LOCK(ipbmap, RDWRLOCK_DMAP);
 
 	nblocks = bmp->db_agfree[agno];
-	range_cnt = min_t(int, range_cnt, nblocks / minlen + 1);
+	range_cnt = nblocks;
+	do_div(range_cnt, (int)minlen);
+	range_cnt = min(range_cnt + 1, 32 * 1024);
 	totrim = kmalloc(sizeof(struct range2trim) * range_cnt, GFP_NOFS);
 	if (totrim == NULL) {
 		jfs_error(bmp->db_ipbmap->i_sb,

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