dm clone metadata: Fix return type of dm_clone_nr_of_hydrated_regions()
dm_clone_nr_of_hydrated_regions() returns the number of regions that have been hydrated so far. In order to do so it employs bitmap_weight(). Until now, the return type of dm_clone_nr_of_hydrated_regions() was unsigned long. Because bitmap_weight() returns an int, in case BITS_PER_LONG == 64 and the return value of bitmap_weight() is 2^31 (the maximum allowed number of regions for a device), the result is sign extended from 32 bits to 64 bits and an incorrect value is displayed, in the status output of dm-clone, as the number of hydrated regions. Fix this by having dm_clone_nr_of_hydrated_regions() return an unsigned int. Fixes: 7431b783 ("dm: add clone target") Cc: stable@vger.kernel.org # v5.4+ Signed-off-by:Nikos Tsironis <ntsironis@arrikto.com> Signed-off-by:
Mike Snitzer <snitzer@redhat.com>
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