On Thu, Sep 30, 2021 at 09:59:32AM +1000, Stephen Rothwell wrote:
> Hi all,
>
> After merging the kspp-gustavo tree, today's linux-next build (x86_64
> allmodconfig) failed like this:
>
> In file included from include/linux/bpf_verifier.h:9,
> from kernel/bpf/verifier.c:12:
[..]
> | ^~~~~~~~~~~~~
> include/linux/filter.h:366:4: error: cast between incompatible function types from 'int (* const)(struct bpf_map *, u32, u64)' {aka 'int (* const)(struct bpf_map *, unsigned int, long long unsigned int)'} to 'u64 (*)(u64, u64, u64, u64, u64)' {aka 'long long unsigned int (*)(long long unsigned int, long long unsigned int, long long unsigned int, long long unsigned int, long long unsigned int)'} [-Werror=cast-function-type]
> 366 | ((u64 (*)(u64, u64, u64, u64, u64))(x))
> | ^
> kernel/bpf/verifier.c:12977:17: note: in expansion of macro 'BPF_CAST_CALL'
> 12977 | insn->imm = BPF_CAST_CALL(ops->map_redirect) -
> | ^~~~~~~~~~~~~
> cc1: all warnings being treated as errors
All these are already fixed in bpf-next.
> Caused by commit
>
> ffea83dd8823 ("Makefile: Enable -Wcast-function-type")
>
> I have reverted that commit for today.
I've just removed that commit from my -next tree, while I
take a look at the ftrace warnings.
Thanks!
--
Gustavo
