[dpdk-dev] [PATCH v4] examples/vhost: fix ioat dependency issue

[Bruce Richardson]

On Thu, Nov 12, 2020 at 01:47:54PM +0000, Cheng Jiang wrote:
> Fix vhost-switch compiling issue when ioat dependency is missing.
> Change 'RTE_x86' check into 'RTE_RAW_IOAT' check in meson build file.
> Use 'RTE_RAW_IOAT' to control conditional compiling in source file.
> Clean some codes.
> 
> Fixes: abec60e7115d ("examples/vhost: support vhost async data path")
> Fixes: 3a04ecb21420 ("examples/vhost: add async vhost args parsing")
> 
> Signed-off-by: Cheng Jiang <Cheng1.jiang at intel.com>
> ---
> v4:
>  * Use macros in ioat.c for conditional compilation instead of changing Makefile.
> 
> v3:
>  * Added fixes lines in commit log.
> 
> v2:
>  * Cleaned some codes
>  * Changed RTE_RAW_IOAT check method in Makefile
>  * Added ioat function definition when RTE_RAW_IOAT is missing
> 
>  examples/vhost/Makefile    |  2 +-
>  examples/vhost/ioat.c      |  6 ++++++
>  examples/vhost/ioat.h      | 32 +++++++++++++++++++++++++-------
>  examples/vhost/main.c      | 22 +++++++++++-----------
>  examples/vhost/meson.build |  2 +-
>  5 files changed, 44 insertions(+), 20 deletions(-)
> 
> diff --git a/examples/vhost/Makefile b/examples/vhost/Makefile
> index cec59d0e0..8c969caaa 100644
> --- a/examples/vhost/Makefile
> +++ b/examples/vhost/Makefile
> @@ -5,7 +5,7 @@
>  APP = vhost-switch
> 
>  # all source are stored in SRCS-y
> -SRCS-y := main.c virtio_net.c
> +SRCS-y := main.c virtio_net.c ioat.c
> 
>  # Build using pkg-config variables if possible
>  ifneq ($(shell pkg-config --exists libdpdk && echo 0),0)
> diff --git a/examples/vhost/ioat.c b/examples/vhost/ioat.c
> index b2c74f653..6f87d7bba 100644
> --- a/examples/vhost/ioat.c
> +++ b/examples/vhost/ioat.c
> @@ -1,13 +1,17 @@
>  /* SPDX-License-Identifier: BSD-3-Clause
>   * Copyright(c) 2010-2020 Intel Corporation
>   */
> +#ifdef RTE_RAW_IOAT
>  #include <rte_rawdev.h>
>  #include <rte_ioat_rawdev.h>
> +#endif /* RTE_RAW_IOAT */
>  #include <sys/uio.h>
> 
>  #include "ioat.h"
>  #include "main.h"
> 
> +#ifdef RTE_RAW_IOAT
> +

Minor nit is that we generally include system header files before DPDK
headers. Following that policy, we can move sys/uio.h up to be before the
first #ifdef, and then we can just merge the two #ifdefs together to just
have one at the start and one at the end.

Acked-by: Bruce Richardson <bruce.richardson at intel.com>