dm snapshot: consolidate insert exception functions

Consolidate the insert_*exception functions.  'insert_completed_exception'
already contains all the logic to handle 'insert_exception' (via
check for a hash_shift of 0), so remove redundant function.

Signed-off-by: Jonathan Brassow <jbrassow@redhat.com>
Reviewed-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>

diff --git a/drivers/md/dm-snap.c b/drivers/md/dm-snap.c
index 48978ab..9135498 100644 (file)
--- a/drivers/md/dm-snap.c
+++ b/drivers/md/dm-snap.c
@@ -390,13 +390,6 @@ static uint32_t exception_hash(struct exception_table *et, chunk_t chunk)
        return (chunk >> et->hash_shift) & et->hash_mask;
 }
 
-static void insert_exception(struct exception_table *eh,
-                            struct dm_snap_exception *e)
-{
-       struct list_head *l = &eh->table[exception_hash(eh, e->old_chunk)];
-       list_add(&e->hash_list, l);
-}
-
 static void remove_exception(struct dm_snap_exception *e)
 {
        list_del(&e->hash_list);
@@ -457,10 +450,9 @@ static void free_pending_exception(struct dm_snap_pending_exception *pe)
        atomic_dec(&s->pending_exceptions_count);
 }
 
-static void insert_completed_exception(struct dm_snapshot *s,
-                                      struct dm_snap_exception *new_e)
+static void insert_exception(struct exception_table *eh,
+                            struct dm_snap_exception *new_e)
 {
-       struct exception_table *eh = &s->complete;
        struct list_head *l;
        struct dm_snap_exception *e = NULL;
 
@@ -518,7 +510,7 @@ static int dm_add_exception(void *context, chunk_t old, chunk_t new)
        /* Consecutive_count is implicitly initialised to zero */
        e->new_chunk = new;
 
-       insert_completed_exception(s, e);
+       insert_exception(&s->complete, e);
 
        return 0;
 }
@@ -925,7 +917,7 @@ static void pending_complete(struct dm_snap_pending_exception *pe, int success)
         * Add a proper exception, and remove the
         * in-flight exception from the list.
         */
-       insert_completed_exception(s, e);
+       insert_exception(&s->complete, e);
 
  out:
        remove_exception(&pe->e);