linux-stable.git/tools/testing/selftests/bpf/prog_tests/wakeup_source.c, branch master Linux kernel stable tree selftests/bpf: Add tests for wakeup_sources kfuncs 2026-05-14T23:04:54+00:00 Samuel Wu wusamuel@google.com 2026-05-11T17:45:57+00:00 9ef647114201b50b60a43054506af893f74ae8b8 Introduce a set of BPF selftests to verify the safety and functionality of wakeup_source kfuncs. The suite includes: 1. A functional test (test_wakeup_source.c) that iterates over the global wakeup_sources list. It uses CO-RE to read timing statistics and validates them in user-space via the BPF ring buffer. 2. A negative test suite (wakeup_source_fail.c) ensuring the BPF verifier correctly enforces reference tracking and type safety. 3. Enable CONFIG_PM_WAKELOCKS in the test config, allowing creation of wakeup sources via /sys/power/wake_lock. A shared header (wakeup_source.h) is introduced to ensure consistent memory layout for the Ring Buffer data between BPF and user-space. Signed-off-by: Samuel Wu <wusamuel@google.com> Link: https://lore.kernel.org/r/20260511174559.659782-3-wusamuel@google.com Signed-off-by: Alexei Starovoitov <ast@kernel.org> 
Introduce a set of BPF selftests to verify the safety and functionality
of wakeup_source kfuncs.

The suite includes:
1. A functional test (test_wakeup_source.c) that iterates over the
   global wakeup_sources list. It uses CO-RE to read timing statistics
   and validates them in user-space via the BPF ring buffer.
2. A negative test suite (wakeup_source_fail.c) ensuring the BPF
   verifier correctly enforces reference tracking and type safety.
3. Enable CONFIG_PM_WAKELOCKS in the test config, allowing creation of
   wakeup sources via /sys/power/wake_lock.

A shared header (wakeup_source.h) is introduced to ensure consistent
memory layout for the Ring Buffer data between BPF and user-space.

Signed-off-by: Samuel Wu <wusamuel@google.com>
Link: https://lore.kernel.org/r/20260511174559.659782-3-wusamuel@google.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>