linux-stable.git/tools/testing/selftests/bpf/libarena/include/bpf_atomic.h, branch master Linux kernel stable tree selftests/bpf: Move arena-related headers into libarena 2026-04-27T01:12:22+00:00 Emil Tsalapatis emil@etsalapatis.com 2026-04-26T19:03:33+00:00 8c1e1c33fe5ad867bc0b6ba121911d70e7881d88 The BPF selftest headers include functionality that is specific to arenas and is required by libarena. Keep libarena self-contained by moving all functionality into its include/ directory. Also add libarena/include to the standard include paths for the selftests to make the moved headers easy to access by existing selftests. Some functionality is required by libarena but not strictly arena-related. We still move it to the libarena/include path, which is an upgrade from directly accessing them from the selftests/bpf directory using relative paths. A new bpf_may_goto.h file is split off of bpf_experimental.h. bpf_arena_spin_lock.h and bpf_arena_common.h are moved to libarena/include. bpf_atomic.h is also moved to libarena because it is necessary for arena spinlocks. For bpf_arena_spin_lock.h, mark the spinlock state array as __weak to define the spinlock state array in the header while also being compatible with multi-compilation unit programs. While we're at it, we remove unnecessary definitions from existing test programs. Signed-off-by: Emil Tsalapatis <emil@etsalapatis.com> Link: https://lore.kernel.org/r/20260426190338.4615-4-emil@etsalapatis.com Signed-off-by: Alexei Starovoitov <ast@kernel.org> 
The BPF selftest headers include functionality that is
specific to arenas and is required by libarena. Keep libarena
self-contained by moving all functionality into its include/
directory. Also add libarena/include to the standard include
paths for the selftests to make the moved headers easy to
access by existing selftests.

Some functionality is required by libarena but not strictly
arena-related. We still move it to the libarena/include path,
which is an upgrade from directly accessing them from the
selftests/bpf directory using relative paths.

A new bpf_may_goto.h file is split off of bpf_experimental.h.
bpf_arena_spin_lock.h and bpf_arena_common.h are moved to
libarena/include. bpf_atomic.h is also moved to libarena
because it is necessary for arena spinlocks.

For bpf_arena_spin_lock.h, mark the spinlock state array as __weak
to define the spinlock state array in the header while also
being compatible with multi-compilation unit programs. While
we're at it, we remove unnecessary definitions from existing
test programs.

Signed-off-by: Emil Tsalapatis <emil@etsalapatis.com>
Link: https://lore.kernel.org/r/20260426190338.4615-4-emil@etsalapatis.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>