wireguard-linux/kernel/events/hw_breakpoint_test.c, branch update-toolchain

perf/hw_breakpoint: remove MODULE_LICENSE in non-modules

2023-04-13T20:13:52Z

Since commit 8b41fc4454e ("kbuild: create modules.builtin without Makefile.modbuiltin or tristate.conf"), MODULE_LICENSE declarations are used to identify modules. As a consequence, uses of the macro in non-modules will cause modprobe to misidentify their containing object file as a module when it is not (false positives), and modprobe might succeed rather than failing with a suitable error message. So remove it in the files in this commit, none of which can be built as modules. Signed-off-by: Nick Alcock Suggested-by: Luis Chamberlain Cc: Luis Chamberlain Cc: linux-modules@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: Hitomi Hasegawa Cc: Peter Zijlstra Cc: Ingo Molnar Cc: Arnaldo Carvalho de Melo Cc: linux-perf-users@vger.kernel.org Signed-off-by: Luis Chamberlain

perf/hw_breakpoint: test: Skip the test if dependencies unmet

2022-11-02T11:22:05Z

Running the test currently fails on non-SMP systems, despite being enabled by default. This means that running the test with: ./tools/testing/kunit/kunit.py run --arch x86_64 hw_breakpoint results in every hw_breakpoint test failing with: # test_one_cpu: failed to initialize: -22 not ok 1 - test_one_cpu Instead, use kunit_skip(), which will mark the test as skipped, and give a more comprehensible message: ok 1 - test_one_cpu # SKIP not enough cpus This makes it more obvious that the test is not suited to the test environment, and so wasn't run, rather than having run and failed. Signed-off-by: David Gow Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Daniel Latypov Acked-by: Marco Elver Link: https://lore.kernel.org/r/20221026141040.1609203-1-davidgow@google.com

perf/hw_breakpoint: Provide hw_breakpoint_is_used() and use in test

2022-08-30T08:56:20Z

Provide hw_breakpoint_is_used() to check if breakpoints are in use on the system. Use it in the KUnit test to verify the global state before and after a test case. Signed-off-by: Marco Elver Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Dmitry Vyukov Acked-by: Ian Rogers Link: https://lore.kernel.org/r/20220829124719.675715-3-elver@google.com

perf/hw_breakpoint: Add KUnit test for constraints accounting

2022-08-30T08:56:20Z

Add KUnit test for hw_breakpoint constraints accounting, with various interesting mixes of breakpoint targets (some care was taken to catch interesting corner cases via bug-injection). The test cannot be built as a module because it requires access to hw_breakpoint_slots(), which is not inlinable or exported on all architectures. Signed-off-by: Marco Elver Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Dmitry Vyukov Acked-by: Ian Rogers Link: https://lore.kernel.org/r/20220829124719.675715-2-elver@google.com