[PATCH v2] eal: add nonnull and access function attributes

[Ruifeng Wang]

> -----Original Message-----
> From: Morten Brørup <mb at smartsharesystems.com>
> Sent: Saturday, December 3, 2022 10:23 PM
> To: dev at dpdk.org; roretzla at linux.microsoft.com
> Cc: Ruifeng Wang <Ruifeng.Wang at arm.com>; zhoumin at loongson.cn; drc at linux.vnet.ibm.com;
> kda at semihalf.com; bruce.richardson at intel.com; konstantin.v.ananyev at yandex.ru; Morten
> Brørup <mb at smartsharesystems.com>
> Subject: [PATCH v2] eal: add nonnull and access function attributes
> 
> Add "nonnull" function attribute to help the compiler detect a NULL pointer being passed
> to a function not accepting NULL pointers as an argument at build time.
> 
> Add "access" function attribute to tell the compiler how a function accesses its pointer
> arguments.
> 
> Add these attributes to the rte_memcpy() function, as the first in hopefully many to come.
> 
> v2:
> * Only define "nonnull" for GCC and CLANG.
> * Append _param/_params to prepare for possible future attributes
>   attached directly to the individual parameters, like __rte_unused.
> * Use RTE_TOOLCHAIN_GCC instead of RTE_CC_GCC, to fix complaints about
>   GCC_VERSION being undefined.
> * Try to fix Doxygen compliants.
> 
> Signed-off-by: Morten Brørup <mb at smartsharesystems.com>
> Acked-by: Tyler Retzlaff <roretzla at linux.microsoft.com>
> ---
>  lib/eal/arm/include/rte_memcpy_32.h |  8 ++++++++  lib/eal/arm/include/rte_memcpy_64.h |
> 6 ++++++
>  lib/eal/include/rte_common.h        | 29 +++++++++++++++++++++++++++++
>  lib/eal/ppc/include/rte_memcpy.h    |  3 +++
>  lib/eal/x86/include/rte_memcpy.h    |  6 ++++++
>  5 files changed, 52 insertions(+)
> 
Reviewed-by: Ruifeng Wang <ruifeng.wang at arm.com>

Thanks and regards.