On Sun, Apr 05, 2026 at 07:44:51PM -0700, Alexei Starovoitov wrote: > On Mon, Mar 30, 2026 at 3:39 PM Gustavo A. R. Silva > <[email protected]> wrote: > > > > Apparently, struct bpf_empty_prog_array exists entirely to populate a > > single element of "items" in a global variable. "null_prog" is only > > used during the initializer. > > > > None of this is needed; globals will be correctly sized with an array > > initializer of a flexible-array member. > > > > So, remove struct bpf_empty_prog_array and adjust the rest of the code, > > accordingly. > > > > With these changes, fix the following warnings: > > > > 7659 ./include/linux/bpf.h:2369:31: warning: structure containing a > > flexible array member is not at the end of another structure > > [-Wflex-array-member-not-at-end] > > > > Signed-off-by: Gustavo A. R. Silva <[email protected]> > > --- > > Changes in v2: > > - Remove struct bpf_empty_prog_array. (Kees) > > Kees, > > It really bothers me that you ask people to clean up > warnings for the sake of removing warnings.
It's not for the sake of warnings; this is to remove the ambiguously sized objects (i.e. structs that the compiler cannot reason about the size of). -- Kees Cook
