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Flexible breakpoints have never been implemented, with bp_cpuinfo::flexible always being 0. Unfortunately, they still occupy 4 bytes in each bp_cpuinfo and bp_busy_slots, as well as computing the max flexible count in fetch_bp_busy_slots(). This again causes suboptimal code generation, when we always know that `!!slots.flexible` will be 0. Just get rid of the flexible "placeholder" and remove all real code related to it. Make a note in the comment related to the constraints algorithm but don't remove them from the algorithm, so that if in future flexible breakpoints need supporting, it should be trivial to revive them (along with reverting this change). Signed-off-by: Marco Elver <elver@google.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Dmitry Vyukov <dvyukov@google.com> Acked-by: Ian Rogers <irogers@google.com> Link: https://lore.kernel.org/r/20220829124719.675715-9-elver@google.com |
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| .. | ||
| callchain.c | ||
| core.c | ||
| hw_breakpoint_test.c | ||
| hw_breakpoint.c | ||
| internal.h | ||
| Makefile | ||
| ring_buffer.c | ||
| uprobes.c | ||