[SCSI] hpsa: use find_first_zero_bit
Use find_first_zero_bit to find the first cleared bit in a memory region. This also includes the following minor changes. - Use bitmap_zero - Reduce unnecessary atomic bitops usage Signed-off-by: NAkinobu Mita <akinobu.mita@gmail.com> Acked-by: NStephen M. Cameron <scameron@beardog.cce.hp.com> Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>
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