[dpdk-dev] [PATCH] ethdev: fix compilation issue with strict flags

[dpdk-dev] [PATCH] ethdev: fix compilation issue with strict flags

[Shahaf Shuler]

Compilation error seen while compiling mlx5 in debug mode
under RHEL 7.3:

rte_ethdev.h:1670:7: error: type of bit-field 'state' is a GCC extension
    [-Werror=pedantic]

Address it by removing the unnecessary bit-field width limitation.

Fixes: d52268a8b24b ("ethdev: expose device states")

Signed-off-by: Shahaf Shuler <shahafs@mellanox.com>
---
 lib/librte_ether/rte_ethdev.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/librte_ether/rte_ethdev.h b/lib/librte_ether/rte_ethdev.h
index d07253874..2d1bc12aa 100644
--- a/lib/librte_ether/rte_ethdev.h
+++ b/lib/librte_ether/rte_ethdev.h
@@ -1667,7 +1667,7 @@ struct rte_eth_dev {
 	 * received packets before passing them to the driver for transmission.
 	 */
 	struct rte_eth_rxtx_callback *pre_tx_burst_cbs[RTE_MAX_QUEUES_PER_PORT];
-	enum rte_eth_dev_state state:8; /**< Flag indicating the port state */
+	enum rte_eth_dev_state state; /**< Flag indicating the port state */
 } __rte_cache_aligned;
 
 struct rte_eth_dev_sriov {
-- 
2.12.0

Re: [dpdk-dev] [PATCH] ethdev: fix compilation issue with strict flags

[Gaëtan Rivet]

Yes, with the __rte_cache_aligned, the :8 should be useless anyway.

On Thu, Apr 13, 2017 at 08:29:27AM +0300, Shahaf Shuler wrote:
>Compilation error seen while compiling mlx5 in debug mode
>under RHEL 7.3:
>
>rte_ethdev.h:1670:7: error: type of bit-field 'state' is a GCC extension
>    [-Werror=pedantic]
>
>Address it by removing the unnecessary bit-field width limitation.
>
>Fixes: d52268a8b24b ("ethdev: expose device states")
>
>Signed-off-by: Shahaf Shuler <shahafs@mellanox.com>
Acked-by: Gaetan Rivet <gaetan.rivet@6wind.com>
>---
> lib/librte_ether/rte_ethdev.h | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
>diff --git a/lib/librte_ether/rte_ethdev.h b/lib/librte_ether/rte_ethdev.h
>index d07253874..2d1bc12aa 100644
>--- a/lib/librte_ether/rte_ethdev.h
>+++ b/lib/librte_ether/rte_ethdev.h
>@@ -1667,7 +1667,7 @@ struct rte_eth_dev {
> 	 * received packets before passing them to the driver for transmission.
> 	 */
> 	struct rte_eth_rxtx_callback *pre_tx_burst_cbs[RTE_MAX_QUEUES_PER_PORT];
>-	enum rte_eth_dev_state state:8; /**< Flag indicating the port state */
>+	enum rte_eth_dev_state state; /**< Flag indicating the port state */
> } __rte_cache_aligned;
>
> struct rte_eth_dev_sriov {
>-- 
>2.12.0
>

-- 
Gaëtan Rivet
6WIND

Re: [dpdk-dev] [PATCH] ethdev: fix compilation issue with strict flags

[Van Haaren, Harry]

> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Shahaf Shuler
> Sent: Thursday, April 13, 2017 6:29 AM
> To: thomas.monjalon@6wind.com
> Cc: adrien.mazarguil@6wind.com; nelio.laranjeiro@6wind.com; dev@dpdk.org
> Subject: [dpdk-dev] [PATCH] ethdev: fix compilation issue with strict flags
> 
> Compilation error seen while compiling mlx5 in debug mode
> under RHEL 7.3:
> 
> rte_ethdev.h:1670:7: error: type of bit-field 'state' is a GCC extension
>     [-Werror=pedantic]
> 
> Address it by removing the unnecessary bit-field width limitation.
> 
> Fixes: d52268a8b24b ("ethdev: expose device states")
> 
> Signed-off-by: Shahaf Shuler <shahafs@mellanox.com>
> ---
>  lib/librte_ether/rte_ethdev.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/lib/librte_ether/rte_ethdev.h b/lib/librte_ether/rte_ethdev.h
> index d07253874..2d1bc12aa 100644
> --- a/lib/librte_ether/rte_ethdev.h
> +++ b/lib/librte_ether/rte_ethdev.h
> @@ -1667,7 +1667,7 @@ struct rte_eth_dev {
>  	 * received packets before passing them to the driver for transmission.
>  	 */
>  	struct rte_eth_rxtx_callback *pre_tx_burst_cbs[RTE_MAX_QUEUES_PER_PORT];
> -	enum rte_eth_dev_state state:8; /**< Flag indicating the port state */
> +	enum rte_eth_dev_state state; /**< Flag indicating the port state */
>  } __rte_cache_aligned;
> 
>  struct rte_eth_dev_sriov {


What is the guidelines of changing ABI of an @internal structure?

If I understand correctly, this @internal structure shouldn't be allocated in the app - so we can extend it at the end without breaking ABI.

Since the state is at the end of the struct, I think this change is safe.

ABI Validate tool with GCC 5.4.0 says ABI compatible, so

Acked-by: Harry van Haaren <harry.van.haaren@intel.com>

Re: [dpdk-dev] [PATCH] ethdev: fix compilation issue with strict flags

[Shahaf Shuler]

Hi,
Any more comments on this commit? Could it be merged? Compilation is still failing.. 

Thursday, April 13, 2017 12:36 PM, Van Haaren, Harry:
> > From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Shahaf Shuler
> > Sent: Thursday, April 13, 2017 6:29 AM
> > To: thomas.monjalon@6wind.com
> > Cc: adrien.mazarguil@6wind.com; nelio.laranjeiro@6wind.com;
> > dev@dpdk.org
> > Subject: [dpdk-dev] [PATCH] ethdev: fix compilation issue with strict
> > flags
> >
> > Compilation error seen while compiling mlx5 in debug mode under RHEL
> > 7.3:
> >
> > rte_ethdev.h:1670:7: error: type of bit-field 'state' is a GCC extension
> >     [-Werror=pedantic]
> >
> > Address it by removing the unnecessary bit-field width limitation.
> >
> > Fixes: d52268a8b24b ("ethdev: expose device states")
> >
> > Signed-off-by: Shahaf Shuler <shahafs@mellanox.com>
Acked-by: Harry van Haaren <harry.van.haaren@intel.com>
Acked-by: Gaetan Rivet <gaetan.rivet@6wind.com>

> > ---
> >  lib/librte_ether/rte_ethdev.h | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/lib/librte_ether/rte_ethdev.h
> > b/lib/librte_ether/rte_ethdev.h index d07253874..2d1bc12aa 100644
> > --- a/lib/librte_ether/rte_ethdev.h
> > +++ b/lib/librte_ether/rte_ethdev.h
> > @@ -1667,7 +1667,7 @@ struct rte_eth_dev {
> >  	 * received packets before passing them to the driver for
> transmission.
> >  	 */
> >  	struct rte_eth_rxtx_callback
> *pre_tx_burst_cbs[RTE_MAX_QUEUES_PER_PORT];
> > -	enum rte_eth_dev_state state:8; /**< Flag indicating the port state
> */
> > +	enum rte_eth_dev_state state; /**< Flag indicating the port state */
> >  } __rte_cache_aligned;
> >
> >  struct rte_eth_dev_sriov {

Re: [dpdk-dev] [PATCH] ethdev: fix compilation issue with strict flags

[Thomas Monjalon]

19/04/2017 07:22, Shahaf Shuler:
> Hi,
> Any more comments on this commit? Could it be merged? Compilation is still
> failing..
> Thursday, April 13, 2017 12:36 PM, Van Haaren, Harry:
> > > From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Shahaf Shuler
> > > Sent: Thursday, April 13, 2017 6:29 AM
> > > To: thomas.monjalon@6wind.com
> > > Cc: adrien.mazarguil@6wind.com; nelio.laranjeiro@6wind.com;
> > > dev@dpdk.org
> > > Subject: [dpdk-dev] [PATCH] ethdev: fix compilation issue with strict
> > > flags
> > > 
> > > Compilation error seen while compiling mlx5 in debug mode under RHEL
> > > 7.3:
> > > 
> > > rte_ethdev.h:1670:7: error: type of bit-field 'state' is a GCC extension
> > > 
> > >     [-Werror=pedantic]
> > > 
> > > Address it by removing the unnecessary bit-field width limitation.
> > > 
> > > Fixes: d52268a8b24b ("ethdev: expose device states")
> > > 
> > > Signed-off-by: Shahaf Shuler <shahafs@mellanox.com>
> 
> Acked-by: Harry van Haaren <harry.van.haaren@intel.com>
> Acked-by: Gaetan Rivet <gaetan.rivet@6wind.com>

Applied, thanks