dm cache: pull out some bitset utility functions for reuse

Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>

1 files changed, 0 insertions, 24 deletions

diff --git a/drivers/md/dm-cache-target.c b/drivers/md/dm-cache-target.c
index 5a9cd2c..5d3b20b 100644
--- a/drivers/md/dm-cache-target.c
+++ b/drivers/md/dm-cache-target.c
@@ -111,30 +111,6 @@ static void iot_io_end(struct io_tracker *iot, sector_t len)
 
 /*----------------------------------------------------------------*/
 
-static size_t bitset_size_in_bytes(unsigned nr_entries)
-{
-	return sizeof(unsigned long) * dm_div_up(nr_entries, BITS_PER_LONG);
-}
-
-static unsigned long *alloc_bitset(unsigned nr_entries)
-{
-	size_t s = bitset_size_in_bytes(nr_entries);
-	return vzalloc(s);
-}
-
-static void clear_bitset(void *bitset, unsigned nr_entries)
-{
-	size_t s = bitset_size_in_bytes(nr_entries);
-	memset(bitset, 0, s);
-}
-
-static void free_bitset(unsigned long *bits)
-{
-	vfree(bits);
-}
-
-/*----------------------------------------------------------------*/
-
 /*
  * There are a couple of places where we let a bio run, but want to do some
  * work before calling its endio function.  We do this by temporarily