summaryrefslogtreecommitdiffstats
path: root/drivers/s390/cio/idset.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/s390/cio/idset.c')
-rw-r--r--drivers/s390/cio/idset.c22
1 files changed, 21 insertions, 1 deletions
diff --git a/drivers/s390/cio/idset.c b/drivers/s390/cio/idset.c
index cf8f24a4b5eb..4d10981c7cc1 100644
--- a/drivers/s390/cio/idset.c
+++ b/drivers/s390/cio/idset.c
@@ -78,7 +78,7 @@ static inline int idset_get_first(struct idset *set, int *ssid, int *id)
struct idset *idset_sch_new(void)
{
- return idset_new(__MAX_SSID + 1, __MAX_SUBCHANNEL + 1);
+ return idset_new(max_ssid + 1, __MAX_SUBCHANNEL + 1);
}
void idset_sch_add(struct idset *set, struct subchannel_id schid)
@@ -110,3 +110,23 @@ int idset_sch_get_first(struct idset *set, struct subchannel_id *schid)
}
return rc;
}
+
+int idset_is_empty(struct idset *set)
+{
+ int bitnum;
+
+ bitnum = find_first_bit(set->bitmap, set->num_ssid * set->num_id);
+ if (bitnum >= set->num_ssid * set->num_id)
+ return 1;
+ return 0;
+}
+
+void idset_add_set(struct idset *to, struct idset *from)
+{
+ unsigned long i, len;
+
+ len = min(__BITOPS_WORDS(to->num_ssid * to->num_id),
+ __BITOPS_WORDS(from->num_ssid * from->num_id));
+ for (i = 0; i < len ; i++)
+ to->bitmap[i] |= from->bitmap[i];
+}