[PATCH 04/12] net/ena: fix build with GCC 12

[Stephen Hemminger]

On Wed, 18 May 2022 12:16:49 +0200
David Marchand <david.marchand at redhat.com> wrote:

> GCC 12 raises the following warning:
> 
> In file included from ../lib/mempool/rte_mempool.h:46,
>                  from ../lib/mbuf/rte_mbuf.h:38,
>                  from ../lib/net/rte_ether.h:22,
>                  from ../drivers/net/ena/ena_ethdev.h:10,
>                  from ../drivers/net/ena/ena_rss.c:6:
> ../drivers/net/ena/ena_rss.c: In function ‘ena_rss_key_fill’:
> ../lib/eal/x86/include/rte_memcpy.h:370:9: warning: array subscript 64 is
>         outside array bounds of ‘uint8_t[40]’ {aka ‘unsigned char[40]’}
>         [-Warray-bounds]
>   370 | rte_mov32((uint8_t *)dst + 2 * 32, (const uint8_t *)src + 2 * 32);
>       | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> ../drivers/net/ena/ena_rss.c:51:24: note: while referencing ‘default_key’
>    51 | static uint8_t default_key[ENA_HASH_KEY_SIZE];
>       |                ^~~~~~~~~~~
> 
> This is a false positive because the copied size is checked against
> ENA_HASH_KEY_SIZE in a (build) assert.
> Silence this warning by calling memcpy with the minimal size.
> 
> Cc: stable at dpdk.org
> 
> Signed-off-by: David Marchand <david.marchand at redhat.com>
> ---


Acked-by: Stephen Hemminger <stephen at networkplumber.org>