linux

iv/linux

History

Song Liu cf094baa3e s390/bpf: Let arch_prepare_bpf_trampoline return program size

arch_prepare_bpf_trampoline() for s390 currently returns 0 on success. This
is not a problem for regular trampoline. However, struct_ops relies on the
return value to advance "image" pointer:

bpf_struct_ops_map_update_elem() {
    ...
    for_each_member(i, t, member) {
        ...
        err = bpf_struct_ops_prepare_trampoline();
        ...
        image += err;
    }
}

When arch_prepare_bpf_trampoline returns 0 on success, all members of the
struct_ops will point to the same trampoline (the last one).

Fix this by returning the program size in arch_prepare_bpf_trampoline (on
success). This is the same behavior as other architectures.

Signed-off-by: Song Liu <song@kernel.org>
Fixes: 528eb2cb87bc ("s390/bpf: Implement arch_prepare_bpf_trampoline()")
Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com>
Link: https://lore.kernel.org/r/20230919060258.3237176-2-song@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

2023-09-19 02:58:22 -07:00

alpha

Kbuild updates for v6.6

2023-09-05 11:01:47 -07:00

arc

ARC updates for v6.6

2023-09-04 15:38:24 -07:00

arm

ARM:

2023-09-07 13:52:20 -07:00

arm64

RISC-V Patches for the 6.6 Merge Window, Part 2 (try 2)