Re: [dpdk-dev] [PATCH v3 3/3] raw/ifpga_rawdev: fix the clang compiling issue

[Jerin Jacob <jerin.jacob@caviumnetworks.com>]

-----Original Message-----
> Date: Wed, 16 May 2018 14:08:02 +0800
> From: Gavin Hu <gavin.hu@arm.com>
> To: dev@dpdk.org
> CC: gavin hu <gavin.hu@arm.com>
> Subject: [dpdk-dev] [PATCH v3 3/3] raw/ifpga_rawdev: fix the clang
>  compiling issue
> X-Mailer: git-send-email 2.17.0
> 
> From: gavin hu <gavin.hu@arm.com>
> 
> The patch fixes the compile issue with clang on ARM64.

Even ARM64 gcc 8.1 could detect this as an error and this patch fixes
too.

> 
> Newly introduced #pragma pack(1) in the header file caused comipiling
> issues for the files who included it.
> 
> In file included from ~/dpdk/drivers/raw/ifpga_rawdev/base/
> ifpga_fme_dperf.c:5:
> In file included from ~/dpdk/drivers/raw/ifpga_rawdev/base/
> ifpga_feature_dev.h:8:
> ~/dpdk/drivers/raw/ifpga_rawdev/base/ifpga_hw.h:8:10: error:
> the current #pragma
> pack alignment value is modified in the included file [-Werror,
> -Wpragma-pack]
> ~/dpdk/drivers/raw/ifpga_rawdev/base/ifpga_defines.h:100:9: note:
> previous '#pragma pack' directive that modifies alignment is here.
> 
> The fix is to change the #pragma pack alignment locally and not have
> effect on other files who included this header file.
> 
> Fixes: 56bb54ea1bdf ("raw/ifpga/base: add Intel FPGA OPAE share code")
> 
> Signed-off-by: Gavin Hu <gavin.hu@arm.com>
> Reviewed-by: Honnappa Nagarahalli <Honnappa.Nagarahalli@arm.com>

Acked-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>

The subject could change to raw/ifpga: if Maintainer wishes to do so to
maintain the consistency.

> ---
>  drivers/raw/ifpga_rawdev/base/ifpga_defines.h | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/raw/ifpga_rawdev/base/ifpga_defines.h b/drivers/raw/ifpga_rawdev/base/ifpga_defines.h
> index 0b9622d5f..aa0252720 100644
> --- a/drivers/raw/ifpga_rawdev/base/ifpga_defines.h
> +++ b/drivers/raw/ifpga_rawdev/base/ifpga_defines.h
> @@ -97,7 +97,7 @@ enum port_feature_id {
>  /*
>   * All headers and structures must be byte-packed to match the spec.
>   */
> -#pragma pack(1)
> +#pragma pack(push, 1)
>  
>  struct feature_header {
>  	union {
> @@ -1659,4 +1659,5 @@ struct bts_header {
>  	(((bts_hdr)->guid_h == GBS_GUID_H) &&		\
>  	((bts_hdr)->guid_l == GBS_GUID_L))
>  
> +#pragma pack(pop)
>  #endif /* _BASE_IFPGA_DEFINES_H_ */
> -- 
> 2.17.0
>