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dm snapshot: fix chunksize sector conversion

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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
This commit is contained in:
Mikulas Patocka
2008-04-24 21:41:50 +01:00
committed by Alasdair G Kergon
parent b69d3987f4
commit 924362629b
1 changed files with 1 additions and 1 deletions
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2
drivers/md/dm-exception-store.c
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@@ -131,7 +131,7 @@ struct pstore {
static unsigned sectors_to_pages(unsigned sectors) 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) static int alloc_area(struct pstore *ps)