diff options
| author | Dave Kleikamp <dave.kleikamp@oracle.com> | 2012-09-18 11:27:22 -0500 |
|---|---|---|
| committer | Dave Kleikamp <dave.kleikamp@oracle.com> | 2012-09-18 11:27:22 -0500 |
| commit | 84f4141ee3ea11035f741d4298cb6bbad1850fcf (patch) | |
| tree | 71a3cef2ad939325000c3a0c0769cafe6d32471a | |
| parent | 550d6da288df57f154ca27c4acb1c398ced42ea9 (diff) | |
| download | blackbird-op-linux-84f4141ee3ea11035f741d4298cb6bbad1850fcf.tar.gz blackbird-op-linux-84f4141ee3ea11035f741d4298cb6bbad1850fcf.zip | |
jfs: Fix do_div precision in commit b40c2e66
In a hasty fix to replace a 64-bit division with do_div, I
unintentionally assigned the divisor to a 32-bit variable.
Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Cc: Tino Reichardt <milky-kernel@mcmilk.de>
| -rw-r--r-- | fs/jfs/jfs_dmap.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/fs/jfs/jfs_dmap.c b/fs/jfs/jfs_dmap.c index 174feb6a73c1..9a55f53be5ff 100644 --- a/fs/jfs/jfs_dmap.c +++ b/fs/jfs/jfs_dmap.c @@ -1641,14 +1641,15 @@ s64 dbDiscardAG(struct inode *ip, int agno, s64 minlen) /* max blkno / nblocks pairs to trim */ int count = 0, range_cnt; + u64 max_ranges; /* prevent others from writing new stuff here, while trimming */ IWRITE_LOCK(ipbmap, RDWRLOCK_DMAP); nblocks = bmp->db_agfree[agno]; - range_cnt = nblocks; - do_div(range_cnt, (int)minlen); - range_cnt = min(range_cnt + 1, 32 * 1024); + max_ranges = nblocks; + do_div(max_ranges, minlen); + range_cnt = min_t(u64, max_ranges + 1, 32 * 1024); totrim = kmalloc(sizeof(struct range2trim) * range_cnt, GFP_NOFS); if (totrim == NULL) { jfs_error(bmp->db_ipbmap->i_sb, |
