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| author | Mikulas Patocka <mpatocka@redhat.com> | 2009-09-25 08:44:51 +1000 |
|---|---|---|
| committer | Stephen Rothwell <sfr@canb.auug.org.au> | 2009-09-25 08:44:51 +1000 |
| commit | 48b17e1d9e1db0aa32cacf082460b5ae14ec8f71 (patch) | |
| tree | 0d5d245bc875f2ad11b513d8acdd63407bc4fa96 | |
| parent | 4df6dc45f8b7bb4a31ec5044205490901de09329 (diff) | |
dm-snapshot-simplify-sector_to_chunk-expression
Removed unnecessary 'and' masking --- right shift discards the lower bits
anyway, so there is no need to clear them.
This is also needed for the correctness of the following patch
dm-snapshot-32bit-chunk-size.patch, that makes chunk_mask 32-bit.
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>
| -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 812c71872ba0..3e8fa029d476 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); |