rcuja range: range add return error value

[userspace-rcu.git] / rcuja / rcuja-range.c

diff --git a/rcuja/rcuja-range.c b/rcuja/rcuja-range.c
index faf60ce48feb86335a669d4de17973f2a2e93ad0..00d68befa20d35b552f314bc680a3a3de81a310d 100644 (file)
--- a/rcuja/rcuja-range.c
+++ b/rcuja/rcuja-range.c
@@ -209,7 +209,7 @@ void rcu_free_range(struct cds_ja *ja, struct cds_ja_range *range)
                        free_range_cb);
 }
 
-struct cds_ja_range *cds_ja_range_add(struct cds_ja *ja,
+int cds_ja_range_add(struct cds_ja *ja,
                uint64_t start,         /* inclusive */
                uint64_t end,           /* inclusive */
                void *priv)
@@ -230,7 +230,7 @@ retry:
        old_range = caa_container_of(old_node, struct cds_ja_range, ja_node);
        switch (CMM_LOAD_SHARED(old_range->type)) {
        case CDS_JA_RANGE_ALLOCATED:
-               return NULL;
+               return -EEXIST;
        case CDS_JA_RANGE_FREE:
                break;
        case CDS_JA_RANGE_REMOVED:
@@ -245,7 +245,7 @@ retry:
                switch (CMM_LOAD_SHARED(old_range->type)) {
                case CDS_JA_RANGE_ALLOCATED:
                case CDS_JA_RANGE_FREE:         /* fall-through */
-                       return NULL;
+                       return -EEXIST;
                case CDS_JA_RANGE_REMOVED:
                        goto retry;
                }
@@ -315,7 +315,7 @@ retry:
 
        rcu_free_range(ja, old_range);
 
-       return new_range;
+       return 0;
 }
 
 int cds_ja_range_del(struct cds_ja *ja, struct cds_ja_range *range)