[PATCH v2] net/iavf: fix compilation warnings

[Thomas Monjalon]

12/06/2023 14:29, Zhang, Qi Z:
> From: Thomas Monjalon <thomas at monjalon.net>
> > 12/06/2023 10:32, Gao, DaxueX:
> > > From: Zeng, ZhichaoX <zhichaox.zeng at intel.com>
> > > > Use fallthrough comments to ignore compilation warnings instead of
> > > > diagnostic pragmas, which are not recognized by old GCC(below GCC7).
> > > >
> > > > Fixes: 95a1b0b23140 ("net/iavf: support Rx timestamp offload on
> > > > SSE")
> > > > Fixes: 4f58266da4d3 ("net/iavf: support Rx timestamp offload on
> > > > AVX2")
> > > > Fixes: d65eadb9e178 ("net/iavf: support Rx timestamp offload on
> > > > AVX512")
> > > > Signed-off-by: Zhichao Zeng <zhichaox.zeng at intel.com>
> > > Tested-by: Daxue Gao <daxuex.gao at intel.com>
> > 
> > Please squash the fix in the original commits above, so we won't have any
> > compilation issue when doing "git bisect".
> > 
> > In the meantime, I am pulling the branch next-net-intel without the Rx
> > timestamp support for SSE/AVX2/AVX512.
> > 
> 
> Squashed to original patches in dpdk-next-net-intel.

It is still not compiling:

In function '_mm_testz_si128',
    inlined from '_recv_raw_pkts_vec_flex_rxd' at ../../dpdk/drivers/net/iavf/iavf_rxtx_vec_sse.c:1070:12:
/usr/lib/gcc/x86_64-pc-linux-gnu/13.1.1/include/smmintrin.h:69:10: error: 'mask_low' may be used uninitialized [-Werror=maybe-uninitialized]
   69 |   return __builtin_ia32_ptestz128 ((__v2di)__M, (__v2di)__V);
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../dpdk/drivers/net/iavf/iavf_rxtx_vec_sse.c: In function '_recv_raw_pkts_vec_flex_rxd':
../../dpdk/drivers/net/iavf/iavf_rxtx_vec_sse.c:1058:49: note: 'mask_low' was declared here
 1058 |                                         __m128i mask_low;
      |                                                 ^~~~~~~~
In function '_mm_testz_si128',
    inlined from '_recv_raw_pkts_vec_flex_rxd' at ../../dpdk/drivers/net/iavf/iavf_rxtx_vec_sse.c:1072:13:
/usr/lib/gcc/x86_64-pc-linux-gnu/13.1.1/include/smmintrin.h:69:10: error: 'mask_high' may be used uninitialized [-Werror=maybe-uninitialized]
   69 |   return __builtin_ia32_ptestz128 ((__v2di)__M, (__v2di)__V);
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../../dpdk/drivers/net/iavf/iavf_rxtx_vec_sse.c: In function '_recv_raw_pkts_vec_flex_rxd':
../../dpdk/drivers/net/iavf/iavf_rxtx_vec_sse.c:1059:49: note: 'mask_high' was declared here
 1059 |                                         __m128i mask_high;
      |                                                 ^~~~~~~~~
cc1: all warnings being treated as errors