[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: Akinobu Mita <akinobu.mita@gmail.com> Acked-by: Stephen M. Cameron <scameron@beardog.cce.hp.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
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@ -579,21 +579,19 @@ static int hpsa_find_target_lun(struct ctlr_info *h,
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int i, found = 0;
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DECLARE_BITMAP(lun_taken, HPSA_MAX_DEVICES);
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memset(&lun_taken[0], 0, HPSA_MAX_DEVICES >> 3);
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bitmap_zero(lun_taken, HPSA_MAX_DEVICES);
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for (i = 0; i < h->ndevices; i++) {
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if (h->dev[i]->bus == bus && h->dev[i]->target != -1)
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set_bit(h->dev[i]->target, lun_taken);
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__set_bit(h->dev[i]->target, lun_taken);
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}
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for (i = 0; i < HPSA_MAX_DEVICES; i++) {
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if (!test_bit(i, lun_taken)) {
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i = find_first_zero_bit(lun_taken, HPSA_MAX_DEVICES);
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if (i < HPSA_MAX_DEVICES) {
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/* *bus = 1; */
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*target = i;
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*lun = 0;
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found = 1;
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break;
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}
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}
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return !found;
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}
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