Hi, In order to keep ahead of cases in the kernel where Control Flow Integrity (CFI) may trip over function call casts, enabling -Wcast-function-type is helpful. To that end, replace BPF_CAST_CALL() as it triggers warnings with this option and is now one of the last places in the kernel in need of fixing. Thanks, -Kees v2: - rebase to bpf-next - add acks v1: https://lore.kernel.org/lkml/20210927182700.2980499-1-keescook@xxxxxxxxxxxx Kees Cook (2): bpf: Replace "want address" users of BPF_CAST_CALL with BPF_CALL_IMM bpf: Replace callers of BPF_CAST_CALL with proper function typedef include/linux/bpf.h | 4 +++- include/linux/filter.h | 7 +++---- kernel/bpf/arraymap.c | 7 +++---- kernel/bpf/hashtab.c | 13 ++++++------- kernel/bpf/helpers.c | 5 ++--- kernel/bpf/verifier.c | 26 +++++++++----------------- lib/test_bpf.c | 2 +- 7 files changed, 27 insertions(+), 37 deletions(-) -- 2.30.2
