remove useless if-before-free (and free-like) functions

See comments in http://bugzilla.redhat.com/839925 for
the code to perform this change.

Signed-off-by: Jim Meyering <meyering@redhat.com>
BUG: 839925
Change-Id: I10e4ecff16c3749fe17c2831c516737e08a3205a
Reviewed-on: http://review.gluster.com/3661
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Anand Avati <avati@redhat.com>

7 files changed, 34 insertions, 70 deletions

diff --git a/xlators/cluster/dht/src/dht-common.c b/xlators/cluster/dht/src/dht-common.c
index eaafc2bfb..51e2c37ae 100644
--- a/xlators/cluster/dht/src/dht-common.c
+++ b/xlators/cluster/dht/src/dht-common.c
@@ -1784,8 +1784,7 @@ dht_vgetxattr_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
 
                 ret = dict_set_dynstr (dict, local->xsel, xattr_buf);
 
-                if (local->xattr_val)
-                        GF_FREE (local->xattr_val);
+                GF_FREE (local->xattr_val);
 
                 DHT_STACK_UNWIND (getxattr, frame, op_ret, op_errno, dict,
                                   xdata);
diff --git a/xlators/cluster/dht/src/dht-helper.c b/xlators/cluster/dht/src/dht-helper.c
index 611de19e4..f0e74a154 100644
--- a/xlators/cluster/dht/src/dht-helper.c
+++ b/xlators/cluster/dht/src/dht-helper.c
@@ -120,10 +120,8 @@ dht_filter_loc_subvol_key (xlator_t *this, loc_t *loc, loc_t *new_loc,
 out:
         if (!ret) {
                 /* !success */
-                if (new_path)
-                        GF_FREE (new_path);
-                if (new_name)
-                        GF_FREE (new_name);
+                GF_FREE (new_path);
+                GF_FREE (new_name);
         }
         return ret;
 }
@@ -206,16 +204,11 @@ dht_local_wipe (xlator_t *this, dht_local_t *local)
                 local->selfheal.layout = NULL;
         }
 
-        if (local->newpath) {
-                GF_FREE (local->newpath);
-        }
+        GF_FREE (local->newpath);
 
-        if (local->key) {
-                GF_FREE (local->key);
-        }
+        GF_FREE (local->key);
 
-        if (local->rebalance.vector)
-                GF_FREE (local->rebalance.vector);
+        GF_FREE (local->rebalance.vector);
 
         if (local->rebalance.iobref)
                 iobref_unref (local->rebalance.iobref);
@@ -750,8 +743,7 @@ dht_migration_complete_check_task (void *data)
                         tmp_loc.path = path;
                 ret = syncop_open (dst_node, &tmp_loc,
                                    local->fd->flags, local->fd);
-                if (path)
-                        GF_FREE (path);
+                GF_FREE (path);
 
         }
         if (ret == -1) {
@@ -874,8 +866,7 @@ dht_rebalance_inprogress_task (void *data)
                         tmp_loc.path = path;
                 ret = syncop_open (dst_node, &tmp_loc,
                                    local->fd->flags, local->fd);
-                if (path)
-                        GF_FREE (path);
+                GF_FREE (path);
         }
 
         if (ret == -1) {
diff --git a/xlators/cluster/dht/src/dht-rebalance.c b/xlators/cluster/dht/src/dht-rebalance.c
index d2a59cc43..e33875ffc 100644
--- a/xlators/cluster/dht/src/dht-rebalance.c
+++ b/xlators/cluster/dht/src/dht-rebalance.c
@@ -408,8 +408,7 @@ __dht_rebalance_migrate_data (xlator_t *from, xlator_t *to, fd_t *src, fd_t *dst
                 offset += ret;
                 total += ret;
 
-                if (vector)
-                        GF_FREE (vector);
+                GF_FREE (vector);
                 if (iobref)
                         iobref_unref (iobref);
                 iobref = NULL;
@@ -417,8 +416,7 @@ __dht_rebalance_migrate_data (xlator_t *from, xlator_t *to, fd_t *src, fd_t *dst
         }
         if (iobref)
                 iobref_unref (iobref);
-        if (vector)
-                GF_FREE (vector);
+        GF_FREE (vector);
 
         if (ret >= 0)
                 ret = 0;
diff --git a/xlators/cluster/dht/src/dht-selfheal.c b/xlators/cluster/dht/src/dht-selfheal.c
index 7ceb80157..8b7d15ce5 100644
--- a/xlators/cluster/dht/src/dht-selfheal.c
+++ b/xlators/cluster/dht/src/dht-selfheal.c
@@ -182,8 +182,7 @@ err:
         if (xattr)
                 dict_destroy (xattr);
 
-        if (disk_layout)
-                GF_FREE (disk_layout);
+        GF_FREE (disk_layout);
 
         dht_selfheal_dir_xattr_cbk (frame, subvol, frame->this,
                                     -1, ENOMEM, NULL);
@@ -703,8 +702,7 @@ done:
                 local->layout = new_layout;
         }
 
-        if (fix_array)
-                GF_FREE (fix_array);
+        GF_FREE (fix_array);
 
         return local->layout;
 }
diff --git a/xlators/cluster/dht/src/dht.c b/xlators/cluster/dht/src/dht.c
index c51285442..6b156c1d3 100644
--- a/xlators/cluster/dht/src/dht.c
+++ b/xlators/cluster/dht/src/dht.c
@@ -213,11 +213,9 @@ fini (xlator_t *this)
                         GF_FREE (conf->file_layouts);
                 }
 
-                if (conf->subvolumes)
-                        GF_FREE (conf->subvolumes);
+                GF_FREE (conf->subvolumes);
 
-                if (conf->subvolume_status)
-                        GF_FREE (conf->subvolume_status);
+                GF_FREE (conf->subvolume_status);
 
                 GF_FREE (conf);
         }
@@ -280,8 +278,7 @@ dht_parse_decommissioned_bricks (xlator_t *this, dht_conf_t *conf,
         ret = 0;
         conf->decommission_in_progress = 1;
 out:
-        if (dup_brick)
-                GF_FREE (dup_brick);
+        GF_FREE (dup_brick);
 
         return ret;
 }
@@ -483,17 +480,13 @@ err:
                         GF_FREE (conf->file_layouts);
                 }
 
-                if (conf->subvolumes)
-                        GF_FREE (conf->subvolumes);
+                GF_FREE (conf->subvolumes);
 
-                if (conf->subvolume_status)
-                        GF_FREE (conf->subvolume_status);
+                GF_FREE (conf->subvolume_status);
 
-                if (conf->du_stats)
-                        GF_FREE (conf->du_stats);
+                GF_FREE (conf->du_stats);
 
-                if (conf->defrag)
-                        GF_FREE (conf->defrag);
+                GF_FREE (conf->defrag);
 
                 GF_FREE (conf);
         }
diff --git a/xlators/cluster/dht/src/nufa.c b/xlators/cluster/dht/src/nufa.c
index 2179870d9..53c66aa45 100644
--- a/xlators/cluster/dht/src/nufa.c
+++ b/xlators/cluster/dht/src/nufa.c
@@ -481,11 +481,9 @@ fini (xlator_t *this)
                         GF_FREE (conf->file_layouts);
                 }
 
-                if (conf->subvolumes)
-                        GF_FREE (conf->subvolumes);
+                GF_FREE (conf->subvolumes);
 
-                if (conf->subvolume_status)
-                        GF_FREE (conf->subvolume_status);
+                GF_FREE (conf->subvolume_status);
 
                 GF_FREE (conf);
         }
@@ -629,14 +627,11 @@ err:
                         GF_FREE (conf->file_layouts);
                 }
 
-                if (conf->subvolumes)
-                        GF_FREE (conf->subvolumes);
+                GF_FREE (conf->subvolumes);
 
-                if (conf->subvolume_status)
-                        GF_FREE (conf->subvolume_status);
+                GF_FREE (conf->subvolume_status);
 
-                if (conf->du_stats)
-                        GF_FREE (conf->du_stats);
+                GF_FREE (conf->du_stats);
 
                 GF_FREE (conf);
         }
diff --git a/xlators/cluster/dht/src/switch.c b/xlators/cluster/dht/src/switch.c
index ab261da87..0542d7f9a 100644
--- a/xlators/cluster/dht/src/switch.c
+++ b/xlators/cluster/dht/src/switch.c
@@ -95,8 +95,7 @@ get_switch_matching_subvol (const char *path, dht_conf_t *conf,
                 trav = trav->next;
         }
 out:
-        if (pathname)
-                GF_FREE (pathname);
+        GF_FREE (pathname);
 
         return subvol;
 }
@@ -589,8 +588,7 @@ fini (xlator_t *this)
                 trav = (struct switch_struct *)conf->private;
                 conf->private = NULL;
                 while (trav) {
-                        if (trav->array)
-                                GF_FREE (trav->array);
+                        GF_FREE (trav->array);
                         prev = trav;
                         trav = trav->next;
                         GF_FREE (prev);
@@ -603,11 +601,9 @@ fini (xlator_t *this)
                         GF_FREE (conf->file_layouts);
                 }
 
-                if (conf->subvolumes)
-                        GF_FREE (conf->subvolumes);
+                GF_FREE (conf->subvolumes);
 
-                if (conf->subvolume_status)
-                        GF_FREE (conf->subvolume_status);
+                GF_FREE (conf->subvolume_status);
 
                 GF_FREE (conf);
         }
@@ -822,16 +818,13 @@ set_switch_pattern (xlator_t *this, dht_conf_t *conf,
 
         return 0;
 err:
-        if (switch_buf_array)
-                GF_FREE (switch_buf_array);
-        if (switch_opt)
-                GF_FREE (switch_opt);
+        GF_FREE (switch_buf_array);
+        GF_FREE (switch_opt);
 
         if (switch_buf) {
                 trav = switch_buf;
                 while (trav) {
-                        if (trav->array)
-                                GF_FREE (trav->array);
+                        GF_FREE (trav->array);
                         switch_opt = trav;
                         trav = trav->next;
                         GF_FREE (switch_opt);
@@ -954,14 +947,11 @@ err:
                         GF_FREE (conf->file_layouts);
                 }
 
-                if (conf->subvolumes)
-                        GF_FREE (conf->subvolumes);
+                GF_FREE (conf->subvolumes);
 
-                if (conf->subvolume_status)
-                        GF_FREE (conf->subvolume_status);
+                GF_FREE (conf->subvolume_status);
 
-                if (conf->du_stats)
-                        GF_FREE (conf->du_stats);
+                GF_FREE (conf->du_stats);
 
                 GF_FREE (conf);
         }