Re: [dpdk-dev] [PATCH] arm64: change rte_memcpy to inline function

[Thomas Monjalon <thomas.monjalon@6wind.com>]

2016-05-19 21:48, Jianbo Liu:
> On 13 May 2016 at 23:49, Thomas Monjalon <thomas.monjalon@6wind.com> wrote:
> > 2016-05-10 14:01, Jianbo Liu:
> >> Other APP may call rte_memcpy by function pointer,
> >> so change it to an inline function.
> >
> > Any example in mind?
> >
> It's for ODP-DPDK.

Given that ODP is open (dataplane), you should also consider ppc64 and tile.

> >> --- a/lib/librte_eal/common/include/arch/arm/rte_memcpy_64.h
> >> +++ b/lib/librte_eal/common/include/arch/arm/rte_memcpy_64.h
> >> -#define rte_memcpy(d, s, n)  memcpy((d), (s), (n))
> >> +static inline void *
> >> +rte_memcpy(void *dst, const void *src, size_t n)
> >> +{
> >> +     return memcpy(dst, src, n);
> >> +}
> >
> > It has no sense if other archs (arm32, ppc64, tile) are not updated.
> >
> But it also an inline function on x86.

In x86, it was implemented as a function because there is some code.
If you want to make sure it is always a function, even in the case
of just calling memcpy from libc, you should put a doxygen comment in
the generic part and adapt every archs.