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| author |   Marco Elver <elver@google.com> | 2022-08-29 14:47:14 +0200 |
|---|---|---|
| committer |   Peter Zijlstra <peterz@infradead.org> | 2022-08-30 10:56:23 +0200 |
| commit | f95e5a3d59011eec1257d0e76de1e1f8969d426f (patch) | |
| tree | 7006acea7638507594b1f481bae7f91dcec29d94 /tools/testing/selftests/exec/git:/ssh:/git@git.zx2c4.com | |
| parent | perf/hw_breakpoint: Remove useless code related to flexible breakpoints (diff) | |
| download | linux-dev-f95e5a3d59011eec1257d0e76de1e1f8969d426f.tar.xz linux-dev-f95e5a3d59011eec1257d0e76de1e1f8969d426f.zip | |
powerpc/hw_breakpoint: Avoid relying on caller synchronization
Internal data structures (cpu_bps, task_bps) of powerpc's hw_breakpoint
implementation have relied on nr_bp_mutex serializing access to them.
Before overhauling synchronization of kernel/events/hw_breakpoint.c,
introduce 2 spinlocks to synchronize cpu_bps and task_bps respectively,
thus avoiding reliance on callers synchronizing powerpc's hw_breakpoint.
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Marco Elver <elver@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Dmitry Vyukov <dvyukov@google.com>
Acked-by: Ian Rogers <irogers@google.com>
Link: https://lore.kernel.org/r/20220829124719.675715-10-elver@google.com
Diffstat (limited to 'tools/testing/selftests/exec/git:/ssh:/git@git.zx2c4.com')
0 files changed, 0 insertions, 0 deletions