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| author | Mikulas Patocka <mpatocka@redhat.com> | 2008-04-24 21:41:50 +0100 |
|---|---|---|
| committer | Alasdair G Kergon <agk@redhat.com> | 2008-04-25 13:26:34 +0100 |
| commit | 924362629bf5645aee5f49f8a0d0d5b193e65997 (patch) | |
| tree | 8233d321e025c0fa057ad4067ab6f4e865d74fe0 /drivers/md/dm-exception-store.c | |
| parent | b69d3987f4360a5e7e9e55465b3cdd0cc204b79e (diff) | |
| download | lwn-924362629bf5645aee5f49f8a0d0d5b193e65997.tar.gz lwn-924362629bf5645aee5f49f8a0d0d5b193e65997.zip | |
dm snapshot: fix chunksize sector conversion
If a snapshot has a smaller chunksize than the page size the
conversion to pages currently returns 0 instead of 1, causing:
kernel BUG in mempool_resize.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Milan Broz <mbroz@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Cc: stable@kernel.org
Diffstat (limited to 'drivers/md/dm-exception-store.c')
| -rw-r--r-- | drivers/md/dm-exception-store.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/md/dm-exception-store.c b/drivers/md/dm-exception-store.c index 5bbce29f143a..c7d305bfd838 100644 --- a/drivers/md/dm-exception-store.c +++ b/drivers/md/dm-exception-store.c @@ -131,7 +131,7 @@ struct pstore { static unsigned sectors_to_pages(unsigned sectors) { - return sectors / (PAGE_SIZE >> 9); + return DIV_ROUND_UP(sectors, PAGE_SIZE >> 9); } static int alloc_area(struct pstore *ps) |