Commit 102c6ddb authored Dec 10, 2009 by Mikulas Patocka Committed by Alasdair G Kergon Dec 10, 2009

dm snapshot: simplify sector_to_chunk expression



Removed unnecessary 'and' masking: The right shift discards the lower
bits so there is no need to clear them.

(A later patch needs this change to support a 32-bit chunk_mask.)

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Reviewed-by: Mike Snitzer <snitzer@redhat.com>
Reviewed-by: Jonathan Brassow <jbrassow@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>

parent f5acc834

drivers/md/dm-exception-store.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -162,7 +162,7 @@ static inline sector_t get_dev_size(struct block_device *bdev)
		static inline chunk_t sector_to_chunk(struct dm_exception_store *store,
		sector_t sector)
		{
		return (sector & ~store->chunk_mask) >> store->chunk_shift;
		return sector >> store->chunk_shift;
		}

		int dm_exception_store_type_register(struct dm_exception_store_type *type);