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| author | Mikulas Patocka <mpatocka@redhat.com> | 2009-12-10 23:52:08 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-07-05 11:11:20 -0700 |
| commit | 31f1b308a6b715bfd2729b832cef2d3270874169 (patch) | |
| tree | 0fa78848c7783bba492e2b8704d223a00d8b3328 | |
| parent | 3cbc79196ec9677ff39e8f187a0ba6636d1e3200 (diff) | |
dm snapshot: simplify sector_to_chunk expression
commit 102c6ddb1d081a6a1fede38c43a42c9811313ec7 upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/md/dm-exception-store.h | 2 |
1 files changed, 1 insertions, 1 deletions
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); |