Messages in this thread Patch in this message | | | Date | Thu, 01 Jul 2010 10:32:51 -0700 | From | Greg KH <> | Subject | [patch 145/149] dm snapshot: simplify sector_to_chunk expression |
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2.6.32-stable review patch. If anyone has any objections, please let us know.
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From: Mikulas Patocka <mpatocka@redhat.com>
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>
--- drivers/md/dm-exception-store.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- 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(stru 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);
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