From: Mikulas Patocka Date: Thu, 10 Dec 2009 23:52:08 +0000 (+0000) Subject: dm snapshot: simplify sector_to_chunk expression X-Git-Tag: v2.6.33-rc1~75^2~50 X-Git-Url: https://git.kernelconcepts.de/?a=commitdiff_plain;h=102c6ddb1d081a6a1fede38c43a42c9811313ec7;p=karo-tx-linux.git 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 Reviewed-by: Mike Snitzer Reviewed-by: Jonathan Brassow Signed-off-by: Alasdair G Kergon --- diff --git a/drivers/md/dm-exception-store.h b/drivers/md/dm-exception-store.h index 8a223a48802c..5f9315b32a42 100644 --- a/drivers/md/dm-exception-store.h +++ b/drivers/md/dm-exception-store.h @@ -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);