On Thu, 2024-02-08 at 20:06 -0800, Alexei Starovoitov wrote:
> From: Alexei Starovoitov <ast@xxxxxxxxxx>
>
> __uint() macro that is used to specify map attributes like:
> __uint(type, BPF_MAP_TYPE_ARRAY);
> __uint(map_flags, BPF_F_MMAPABLE);
> is limited to 32-bit, since BTF_KIND_ARRAY has u32 "number of elements" field.
>
> Introduce __ulong() macro that allows specifying values bigger than 32-bit.
> In map definition "map_extra" is the only u64 field.
>
> Signed-off-by: Alexei Starovoitov <ast@xxxxxxxxxx>
> ---
Acked-by: Eduard Zingerman <eddyz87@xxxxxxxxx>
Another option would be something like:
#define __ulong(name, val) int (*name)[val >> 32][(val << 32) >> 32]
thus avoiding generation of __unique_value_123 literals,
but these literals probably should not be an issue.
