From: Mikulas Patocka Break the function set_chunk_size to two functions in preparation for the fix in the following patch. Cc: stable@kernel.org Signed-off-by: Mikulas Patocka Signed-off-by: Alasdair G Kergon --- drivers/md/dm-exception-store.c | 8 ++++++++ drivers/md/dm-exception-store.h | 4 ++++ 2 files changed, 12 insertions(+) Index: linux-2.6.31-rc8/drivers/md/dm-exception-store.c =================================================================== --- linux-2.6.31-rc8.orig/drivers/md/dm-exception-store.c +++ linux-2.6.31-rc8/drivers/md/dm-exception-store.c @@ -171,6 +171,14 @@ static int set_chunk_size(struct dm_exce */ chunk_size_ulong = round_up(chunk_size_ulong, PAGE_SIZE >> 9); + return dm_exception_store_set_chunk_size(store, chunk_size_ulong, + error); +} + +int dm_exception_store_set_chunk_size(struct dm_exception_store *store, + unsigned long chunk_size_ulong, + char **error) +{ /* Check chunk_size is a power of 2 */ if (!is_power_of_2(chunk_size_ulong)) { *error = "Chunk size is not a power of 2"; Index: linux-2.6.31-rc8/drivers/md/dm-exception-store.h =================================================================== --- linux-2.6.31-rc8.orig/drivers/md/dm-exception-store.h +++ linux-2.6.31-rc8/drivers/md/dm-exception-store.h @@ -168,6 +168,10 @@ static inline chunk_t sector_to_chunk(st int dm_exception_store_type_register(struct dm_exception_store_type *type); int dm_exception_store_type_unregister(struct dm_exception_store_type *type); +int dm_exception_store_set_chunk_size(struct dm_exception_store *store, + unsigned long chunk_size_ulong, + char **error); + int dm_exception_store_create(struct dm_target *ti, int argc, char **argv, unsigned *args_used, struct dm_exception_store **store);