[SCTP]: Remove sctp_add_cmd_sf wrapper bloat

With a was number of callsites sctp_add_cmd_sf wrapper bloats
kernel by some amount. Due to unlikely tracking allyesconfig,
with the initial result were around ~7kB (thus caught my
attention) while a non-debug config produced only ~2.3kB effect.

I (ij) proposed first a patch to uninline it but Vlad responded
with a patch that removed the only sctp_add_cmd call which is
wrapped by sctp_add_cmd_sf (I wasn't sure if I could do that).
I did minor cleanup to Vlad's patch.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

4 files changed, 5 insertions, 24 deletions

diff --git a/include/net/sctp/command.h b/include/net/sctp/command.h
index 10ae2da6f93b..4263af857794 100644
--- a/include/net/sctp/command.h
+++ b/include/net/sctp/command.h
@@ -205,12 +205,11 @@ typedef struct {
 int sctp_init_cmd_seq(sctp_cmd_seq_t *seq);
 
 /* Add a command to an sctp_cmd_seq_t.
- * Return 0 if the command sequence is full.
  *
  * Use the SCTP_* constructors defined by SCTP_ARG_CONSTRUCTOR() above
  * to wrap data which goes in the obj argument.
  */
-int sctp_add_cmd(sctp_cmd_seq_t *seq, sctp_verb_t verb, sctp_arg_t obj);
+void sctp_add_cmd_sf(sctp_cmd_seq_t *seq, sctp_verb_t verb, sctp_arg_t obj);
 
 /* Return the next command structure in an sctp_cmd_seq.
  * Return NULL at the end of the sequence.
diff --git a/include/net/sctp/sm.h b/include/net/sctp/sm.h
index ef9e7ed2c82e..24811732bdb2 100644
--- a/include/net/sctp/sm.h
+++ b/include/net/sctp/sm.h
@@ -385,14 +385,6 @@ static inline int ADDIP_SERIAL_gte(__u16 s, __u16 t)
         return (((s) == (t)) || (((t) - (s)) & ADDIP_SERIAL_SIGN_BIT));
 }
 
-
-/* Run sctp_add_cmd() generating a BUG() if there is a failure.  */
-static inline void sctp_add_cmd_sf(sctp_cmd_seq_t *seq, sctp_verb_t verb, sctp_arg_t obj)
-{
-        if (unlikely(!sctp_add_cmd(seq, verb, obj)))
-                BUG();
-}
-
 /* Check VTAG of the packet matches the sender's own tag. */
 static inline int
 sctp_vtag_verify(const struct sctp_chunk *chunk,
diff --git a/net/sctp/command.c b/net/sctp/command.c
index bb977330002a..c0044019db9e 100644
--- a/net/sctp/command.c
+++ b/net/sctp/command.c
@@ -52,18 +52,12 @@ int sctp_init_cmd_seq(sctp_cmd_seq_t *seq)
 /* Add a command to a sctp_cmd_seq_t.
  * Return 0 if the command sequence is full.
  */
-int sctp_add_cmd(sctp_cmd_seq_t *seq, sctp_verb_t verb, sctp_arg_t obj)
+void sctp_add_cmd_sf(sctp_cmd_seq_t *seq, sctp_verb_t verb, sctp_arg_t obj)
 {
-        if (seq->next_free_slot >= SCTP_MAX_NUM_COMMANDS)
-                goto fail;
+        BUG_ON(seq->next_free_slot >= SCTP_MAX_NUM_COMMANDS);
 
         seq->cmds[seq->next_free_slot].verb = verb;
         seq->cmds[seq->next_free_slot++].obj = obj;
-
-        return 1;
-
-fail:
-        return 0;
 }
 
 /* Return the next command structure in a sctp_cmd_seq.
diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c
index 6545b5fcbc73..b534dbef864f 100644
--- a/net/sctp/sm_statefuns.c
+++ b/net/sctp/sm_statefuns.c
@@ -3135,12 +3135,8 @@ sctp_disposition_t sctp_sf_operr_notify(const struct sctp_endpoint *ep,
                 if (!ev)
                         goto nomem;
 
-                if (!sctp_add_cmd(commands, SCTP_CMD_EVENT_ULP,
-                                  SCTP_ULPEVENT(ev))) {
-                        sctp_ulpevent_free(ev);
-                        goto nomem;
-                }
-
+                sctp_add_cmd_sf(commands, SCTP_CMD_EVENT_ULP,
+                                SCTP_ULPEVENT(ev));
                 sctp_add_cmd_sf(commands, SCTP_CMD_PROCESS_OPERR,
                                 SCTP_CHUNK(chunk));
         }