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author | Marco Elver <elver@google.com> | 2021-11-30 14:44:11 +0300 |
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committer | Paul E. McKenney <paulmck@kernel.org> | 2021-12-10 03:42:26 +0300 |
commit | 9756f64c8f2d19c0029a5827bda8ac275302ec22 (patch) | |
tree | 8c3d8f3bb18b527d6da3b27ff899f9d6f1ae6b62 /scripts/Makefile.kcsan | |
parent | 71f8de7092cb2cf95e3f7055df139118d1445597 (diff) | |
download | linux-9756f64c8f2d19c0029a5827bda8ac275302ec22.tar.xz |
kcsan: Avoid checking scoped accesses from nested contexts
Avoid checking scoped accesses from nested contexts (such as nested
interrupts or in scheduler code) which share the same kcsan_ctx.
This is to avoid detecting false positive races of accesses in the same
thread with currently scoped accesses: consider setting up a watchpoint
for a non-scoped (normal) access that also "conflicts" with a current
scoped access. In a nested interrupt (or in the scheduler), which shares
the same kcsan_ctx, we cannot check scoped accesses set up in the parent
context -- simply ignore them in this case.
With the introduction of kcsan_ctx::disable_scoped, we can also clean up
kcsan_check_scoped_accesses()'s recursion guard, and do not need to
modify the list's prev pointer.
Signed-off-by: Marco Elver <elver@google.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'scripts/Makefile.kcsan')
0 files changed, 0 insertions, 0 deletions