Re: [PATCH] net/sxe2: fix 32-bit SSE build

[Thomas Monjalon <thomas@monjalon.net>]

28/05/2026 11:47, David Marchand:
> On Thu, 28 May 2026 at 10:47, Thomas Monjalon <thomas@monjalon.net> wrote:
> >
> > Seen in OBS on i586 Debian:
> >
> > from ../drivers/net/sxe2/sxe2_txrx_vec_sse.c:5:
> >         In function ‘_mm_loadu_si128’,
> >                 inlined from ‘rte_memcpy’
> >                 inlined from ‘sxe2_rx_pkts_refactor’
> >                         at ../drivers/net/sxe2/sxe2_txrx_vec_common.h:233:2:
> >         /usr/lib/gcc/i686-linux-gnu/12/include/emmintrin.h:703:10: error:
> >         array subscript 8 is outside array bounds of ‘struct rte_mbuf *[32]’
> >
> > The important options to reproduce are "-m32 -O2 -march=corei7".
> >
> > In 32-bit build the pointer array done_pkts[32] is smaller:
> >         32 * 4 = 128 bytes
> > so an SSE access  would be outside the bound.
> >
> > The libc memcpy does not trigger such warning
> > and is a good choice to copy an array of pointers.
> >
> > Signed-off-by: Thomas Monjalon <thomas@monjalon.net>
> 
> I reproduced and checked Debian 13 32 bits build with OBS.
> Tested-by: David Marchand <david.marchand@redhat.com>

Thanks for testing.

I forgot this:

Fixes: 885647d31504 ("net/sxe2: fix 32-bit SSE build")