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-rw-r--r--net/ceph/crush/mapper.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/net/ceph/crush/mapper.c b/net/ceph/crush/mapper.c
index 82cab7d3e89d..dcf48bc504ea 100644
--- a/net/ceph/crush/mapper.c
+++ b/net/ceph/crush/mapper.c
@@ -478,15 +478,17 @@ reject:
* @result_max: maximum result size
* @weight: weight vector (for map leaves)
* @weight_max: size of weight vector
+ * @scratch: scratch vector for private use; must be >= 3 * result_max
*/
int crush_do_rule(const struct crush_map *map,
int ruleno, int x, int *result, int result_max,
- const __u32 *weight, int weight_max)
+ const __u32 *weight, int weight_max,
+ int *scratch)
{
int result_len;
- int a[CRUSH_MAX_SET];
- int b[CRUSH_MAX_SET];
- int c[CRUSH_MAX_SET];
+ int *a = scratch;
+ int *b = scratch + result_max;
+ int *c = scratch + result_max*2;
int recurse_to_leaf;
int *w;
int wsize = 0;