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>
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@ -162,7 +162,7 @@ static inline sector_t get_dev_size(struct block_device *bdev)
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static inline chunk_t sector_to_chunk(struct dm_exception_store *store,
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sector_t sector)
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{
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return (sector & ~store->chunk_mask) >> store->chunk_shift;
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return sector >> store->chunk_shift;
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}
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int dm_exception_store_type_register(struct dm_exception_store_type *type);
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