[dpdk-dev] [PATCH v3 2/4] virtio: move SSE based Rx implementation to separate file
Yuanhan Liu
yuanhan.liu at linux.intel.com
Thu Aug 18 08:52:31 CEST 2016
On Tue, Jul 05, 2016 at 06:19:24PM +0530, Jerin Jacob wrote:
> Split out SSE instruction based virtio simple Rx
> implementation to a separate file
>
> Signed-off-by: Jerin Jacob <jerin.jacob at caviumnetworks.com>
Hi,
I was about to apply this set. I then did some build test and found a
weird issue: it breaks the build with clang (ubuntu 16.04).
drivers/net/virtio/virtio_rxtx_simple_sse.c:130:2: error: cast from 'const void *' to 'void *' drops const qualifier [-Werror,-Wcast-qual]
_mm_prefetch((const void *)rused, _MM_HINT_T0);
^
/usr/lib/llvm-3.8/bin/../lib/clang/3.8.0/include/xmmintrin.h:684:58: note: expanded from macro '_mm_prefetch'
#define _mm_prefetch(a, sel) (__builtin_prefetch((void *)(a), 0, (sel)))
^
1 error generated.
Weird enough I don't see this issue before this commit: the error
line is exactly the same before and after this commit.
Another note is that _mm_prefetch() is actually with different prototype
for gcc and clang. For gcc, we have:
_mm_prefetch (const void *__P, enum _mm_hint __I)
Any thoughts?
--yliu
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