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authorMikulas Patocka <mpatocka@redhat.com>2008-04-24 21:41:50 +0100
committerAlasdair G Kergon <agk@redhat.com>2008-04-25 13:26:34 +0100
commit924362629bf5645aee5f49f8a0d0d5b193e65997 (patch)
tree8233d321e025c0fa057ad4067ab6f4e865d74fe0 /drivers/md/dm-exception-store.c
parentb69d3987f4360a5e7e9e55465b3cdd0cc204b79e (diff)
downloadop-kernel-dev-924362629bf5645aee5f49f8a0d0d5b193e65997.zip
op-kernel-dev-924362629bf5645aee5f49f8a0d0d5b193e65997.tar.gz
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.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/md/dm-exception-store.c b/drivers/md/dm-exception-store.c
index 5bbce29..c7d305b 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)
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