Commit 92436262 authored Apr 24, 2008 by Mikulas Patocka Committed by Alasdair G Kergon Apr 25, 2008

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

parent b69d3987

drivers/md/dm-exception-store.c

+1 −1

Original line number	Original line	Diff line number	Diff line
	@@ -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)