Reviewed-by: Jan Friesse <[email protected]>

Steven Dake wrote:
> The recv_flush code is no longer necessary because of the miss_count_count
> addition.  It can in some cases lead to register corruption because of
> interactions with -fstack-protector, the recursive nature of how this code
> works, and interactions with the optimizer in some versions of gcc.
> 
> Signed-off-by: Steven Dake <[email protected]>
> ---
>  exec/totemiba.c  |   10 ----------
>  exec/totemnet.c  |   15 ---------------
>  exec/totemnet.h  |    2 --
>  exec/totemrrp.c  |   54 
> ------------------------------------------------------
>  exec/totemrrp.h  |    3 ---
>  exec/totemsrp.c  |    2 --
>  exec/totemudp.c  |   30 +-----------------------------
>  exec/totemudpu.c |    7 -------
>  8 files changed, 1 insertions(+), 122 deletions(-)
> 
> diff --git a/exec/totemiba.c b/exec/totemiba.c
> index a0379ff..ec4ccfc 100644
> --- a/exec/totemiba.c
> +++ b/exec/totemiba.c
> @@ -1329,16 +1329,6 @@ int totemiba_processor_count_set (
>       return (res);
>  }
>  
> -int totemiba_recv_flush (void *iba_context)
> -{
> -     struct totemiba_instance *instance = (struct totemiba_instance 
> *)iba_context;
> -     int res = 0;
> -
> -     instance = NULL;
> -
> -     return (res);
> -}
> -
>  int totemiba_send_flush (void *iba_context)
>  {
>       struct totemiba_instance *instance = (struct totemiba_instance 
> *)iba_context;
> diff --git a/exec/totemnet.c b/exec/totemnet.c
> index c7670f9..26562ee 100644
> --- a/exec/totemnet.c
> +++ b/exec/totemnet.c
> @@ -87,8 +87,6 @@ struct transport {
>               const void *msg,
>               unsigned int msg_len);
>  
> -     int (*recv_flush) (void *transport_context);
> -
>       int (*send_flush) (void *transport_context);
>  
>       int (*iface_check) (void *transport_context);
> @@ -131,7 +129,6 @@ struct transport transport_entries[] = {
>               .token_send = totemudp_token_send,
>               .mcast_flush_send = totemudp_mcast_flush_send,
>               .mcast_noflush_send = totemudp_mcast_noflush_send,
> -             .recv_flush = totemudp_recv_flush,
>               .send_flush = totemudp_send_flush,
>               .iface_check = totemudp_iface_check,
>               .finalize = totemudp_finalize,
> @@ -149,7 +146,6 @@ struct transport transport_entries[] = {
>               .token_send = totemudpu_token_send,
>               .mcast_flush_send = totemudpu_mcast_flush_send,
>               .mcast_noflush_send = totemudpu_mcast_noflush_send,
> -             .recv_flush = totemudpu_recv_flush,
>               .send_flush = totemudpu_send_flush,
>               .iface_check = totemudpu_iface_check,
>               .finalize = totemudpu_finalize,
> @@ -170,7 +166,6 @@ struct transport transport_entries[] = {
>               .token_send = totemiba_token_send,
>               .mcast_flush_send = totemiba_mcast_flush_send,
>               .mcast_noflush_send = totemiba_mcast_noflush_send,
> -             .recv_flush = totemiba_recv_flush,
>               .send_flush = totemiba_send_flush,
>               .iface_check = totemiba_iface_check,
>               .finalize = totemiba_finalize,
> @@ -307,16 +302,6 @@ int totemnet_processor_count_set (
>       return (res);
>  }
>  
> -int totemnet_recv_flush (void *net_context)
> -{
> -     struct totemnet_instance *instance = (struct totemnet_instance 
> *)net_context;
> -     int res = 0;
> -
> -     res = instance->transport->recv_flush (instance->transport_context);
> -
> -     return (res);
> -}
> -
>  int totemnet_send_flush (void *net_context)
>  {
>       struct totemnet_instance *instance = (struct totemnet_instance 
> *)net_context;
> diff --git a/exec/totemnet.h b/exec/totemnet.h
> index 7e6374c..a0a51eb 100644
> --- a/exec/totemnet.h
> +++ b/exec/totemnet.h
> @@ -88,8 +88,6 @@ extern int totemnet_mcast_noflush_send (
>       const void *msg,
>       unsigned int msg_len);
>  
> -extern int totemnet_recv_flush (void *net_context);
> -
>  extern int totemnet_send_flush (void *net_context);
>  
>  extern int totemnet_iface_check (void *net_context);
> diff --git a/exec/totemrrp.c b/exec/totemrrp.c
> index a8ebd08..5a9b7b3 100644
> --- a/exec/totemrrp.c
> +++ b/exec/totemrrp.c
> @@ -143,9 +143,6 @@ struct rrp_algo {
>               const void *msg,
>               unsigned int msg_len);
>  
> -     void (*recv_flush) (
> -             struct totemrrp_instance *instance);
> -
>       void (*send_flush) (
>               struct totemrrp_instance *instance);
>  
> @@ -276,9 +273,6 @@ static void none_token_send (
>       const void *msg,
>       unsigned int msg_len);
>  
> -static void none_recv_flush (
> -     struct totemrrp_instance *instance);
> -
>  static void none_send_flush (
>       struct totemrrp_instance *instance);
>  
> @@ -346,9 +340,6 @@ static void passive_token_send (
>       const void *msg,
>       unsigned int msg_len);
>  
> -static void passive_recv_flush (
> -     struct totemrrp_instance *instance);
> -
>  static void passive_send_flush (
>       struct totemrrp_instance *instance);
>  
> @@ -416,9 +407,6 @@ static void active_token_send (
>       const void *msg,
>       unsigned int msg_len);
>  
> -static void active_recv_flush (
> -     struct totemrrp_instance *instance);
> -
>  static void active_send_flush (
>       struct totemrrp_instance *instance);
>  
> @@ -470,7 +458,6 @@ struct rrp_algo none_algo = {
>       .mcast_flush_send       = none_mcast_flush_send,
>       .token_recv             = none_token_recv,
>       .token_send             = none_token_send,
> -     .recv_flush             = none_recv_flush,
>       .send_flush             = none_send_flush,
>       .iface_check            = none_iface_check,
>       .processor_count_set    = none_processor_count_set,
> @@ -489,7 +476,6 @@ struct rrp_algo passive_algo = {
>       .mcast_flush_send       = passive_mcast_flush_send,
>       .token_recv             = passive_token_recv,
>       .token_send             = passive_token_send,
> -     .recv_flush             = passive_recv_flush,
>       .send_flush             = passive_send_flush,
>       .iface_check            = passive_iface_check,
>       .processor_count_set    = passive_processor_count_set,
> @@ -508,7 +494,6 @@ struct rrp_algo active_algo = {
>       .mcast_flush_send       = active_mcast_flush_send,
>       .token_recv             = active_token_recv,
>       .token_send             = active_token_send,
> -     .recv_flush             = active_recv_flush,
>       .send_flush             = active_send_flush,
>       .iface_check            = active_iface_check,
>       .processor_count_set    = active_processor_count_set,
> @@ -594,11 +579,6 @@ static void none_token_send (
>               msg, msg_len);
>  }
>  
> -static void none_recv_flush (struct totemrrp_instance *instance)
> -{
> -     totemnet_recv_flush (instance->net_handles[0]);
> -}
> -
>  static void none_send_flush (struct totemrrp_instance *instance)
>  {
>       totemnet_send_flush (instance->net_handles[0]);
> @@ -930,19 +910,6 @@ static void passive_token_send (
>  
>  }
>  
> -static void passive_recv_flush (struct totemrrp_instance *instance)
> -{
> -     struct passive_instance *rrp_algo_instance = (struct passive_instance 
> *)instance->rrp_algo_instance;
> -     unsigned int i;
> -
> -     for (i = 0; i < instance->interface_count; i++) {
> -             if (rrp_algo_instance->faulty[i] == 0) {
> -
> -                     totemnet_recv_flush (instance->net_handles[i]);
> -             }
> -     }
> -}
> -
>  static void passive_send_flush (struct totemrrp_instance *instance)
>  {
>       struct passive_instance *rrp_algo_instance = (struct passive_instance 
> *)instance->rrp_algo_instance;
> @@ -1325,19 +1292,6 @@ static void active_token_send (
>       }
>  }
>  
> -static void active_recv_flush (struct totemrrp_instance *instance)
> -{
> -     struct active_instance *rrp_algo_instance = (struct active_instance 
> *)instance->rrp_algo_instance;
> -     unsigned int i;
> -
> -     for (i = 0; i < instance->interface_count; i++) {
> -             if (rrp_algo_instance->faulty[i] == 0) {
> -
> -                     totemnet_recv_flush (instance->net_handles[i]);
> -             }
> -     }
> -}
> -
>  static void active_send_flush (struct totemrrp_instance *instance)
>  {
>       struct active_instance *rrp_algo_instance = (struct active_instance 
> *)instance->rrp_algo_instance;
> @@ -1687,14 +1641,6 @@ int totemrrp_token_target_set (
>  
>       return (0);
>  }
> -int totemrrp_recv_flush (void *rrp_context)
> -{
> -     struct totemrrp_instance *instance = (struct totemrrp_instance 
> *)rrp_context;
> -
> -     instance->rrp_algo->recv_flush (instance);
> -
> -     return (0);
> -}
>  
>  int totemrrp_send_flush (void *rrp_context)
>  {
> diff --git a/exec/totemrrp.h b/exec/totemrrp.h
> index da79ed2..6a70527 100644
> --- a/exec/totemrrp.h
> +++ b/exec/totemrrp.h
> @@ -98,9 +98,6 @@ extern int totemrrp_mcast_flush_send (
>       const void *msg,
>       unsigned int msg_len);
>  
> -extern int totemrrp_recv_flush (
> -     void *rrp_context);
> -
>  extern int totemrrp_send_flush (
>       void *rrp_context);
>  
> diff --git a/exec/totemsrp.c b/exec/totemsrp.c
> index 045fd5c..88a8f0f 100644
> --- a/exec/totemsrp.c
> +++ b/exec/totemsrp.c
> @@ -3418,8 +3418,6 @@ static int message_handler_orf_token (
>       }
>  #endif
>  
> -     totemrrp_recv_flush (instance->totemrrp_context);
> -
>       /*
>        * Determine if we should hold (in reality drop) the token
>        */
> diff --git a/exec/totemudp.c b/exec/totemudp.c
> index b96bdbd..977e754 100644
> --- a/exec/totemudp.c
> +++ b/exec/totemudp.c
> @@ -1178,11 +1178,7 @@ static int net_deliver_fn (
>       unsigned char *msg_offset;
>       unsigned int size_delv;
>  
> -     if (instance->flushing == 1) {
> -             iovec = &instance->totemudp_iov_recv_flush;
> -     } else {
> -             iovec = &instance->totemudp_iov_recv;
> -     }
> +     iovec = &instance->totemudp_iov_recv;
>  
>       /*
>        * Receive datagram
> @@ -1853,30 +1849,6 @@ int totemudp_processor_count_set (
>       return (res);
>  }
>  
> -int totemudp_recv_flush (void *udp_context)
> -{
> -     struct totemudp_instance *instance = (struct totemudp_instance 
> *)udp_context;
> -     struct pollfd ufd;
> -     int nfds;
> -     int res = 0;
> -
> -     instance->flushing = 1;
> -
> -     do {
> -             ufd.fd = instance->totemudp_sockets.mcast_recv;
> -             ufd.events = POLLIN;
> -             nfds = poll (&ufd, 1, 0);
> -             if (nfds == 1 && ufd.revents & POLLIN) {
> -             net_deliver_fn (0, instance->totemudp_sockets.mcast_recv,
> -                     ufd.revents, instance);
> -             }
> -     } while (nfds == 1);
> -
> -     instance->flushing = 0;
> -
> -     return (res);
> -}
> -
>  int totemudp_send_flush (void *udp_context)
>  {
>       struct totemudp_instance *instance = (struct totemudp_instance 
> *)udp_context;
> diff --git a/exec/totemudpu.c b/exec/totemudpu.c
> index 2db33ad..e4ea431 100644
> --- a/exec/totemudpu.c
> +++ b/exec/totemudpu.c
> @@ -1498,13 +1498,6 @@ int totemudpu_processor_count_set (
>       return (res);
>  }
>  
> -int totemudpu_recv_flush (void *udpu_context)
> -{
> -     int res = 0;
> -
> -     return (res);
> -}
> -
>  int totemudpu_send_flush (void *udpu_context)
>  {
>       int res = 0;

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