Re: [PATCH v4 1/2] bpf: add __weak hook for allocating executable memory

From: Edgecombe, Rick P
Date: Mon Nov 26 2018 - 12:02:39 EST

On Fri, 2018-11-23 at 23:18 +0100, Ard Biesheuvel wrote:
> By default, BPF uses module_alloc() to allocate executable memory,
> but this is not necessary on all arches and potentially undesirable
> on some of them.
> So break out the module_alloc() and module_memfree() calls into __weak
> functions to allow them to be overridden in arch code.
> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx>
> ---

It looks like some of the architectures call module_alloc directly in their
bpf_jit_compile implementations as well.