From 263d9401a332ccec8945841dbc57707dcba1ec7d Mon Sep 17 00:00:00 2001 From: Akinobu Mita Date: Sat, 21 Jan 2012 00:15:27 +0900 Subject: [PATCH] [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 Acked-by: Stephen M. Cameron Signed-off-by: James Bottomley --- drivers/scsi/hpsa.c | 18 ++++++++---------- 1 file changed, 8 insertions(+), 10 deletions(-) diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c index 13195072b234..5019bea323ce 100644 --- a/drivers/scsi/hpsa.c +++ b/drivers/scsi/hpsa.c @@ -579,21 +579,19 @@ static int hpsa_find_target_lun(struct ctlr_info *h, int i, found = 0; DECLARE_BITMAP(lun_taken, HPSA_MAX_DEVICES); - memset(&lun_taken[0], 0, HPSA_MAX_DEVICES >> 3); + bitmap_zero(lun_taken, HPSA_MAX_DEVICES); for (i = 0; i < h->ndevices; i++) { if (h->dev[i]->bus == bus && h->dev[i]->target != -1) - set_bit(h->dev[i]->target, lun_taken); + __set_bit(h->dev[i]->target, lun_taken); } - for (i = 0; i < HPSA_MAX_DEVICES; i++) { - if (!test_bit(i, lun_taken)) { - /* *bus = 1; */ - *target = i; - *lun = 0; - found = 1; - break; - } + i = find_first_zero_bit(lun_taken, HPSA_MAX_DEVICES); + if (i < HPSA_MAX_DEVICES) { + /* *bus = 1; */ + *target = i; + *lun = 0; + found = 1; } return !found; } -- GitLab