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kcsan: Remove CONFIG_KCSAN_DEBUG

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By this point CONFIG_KCSAN_DEBUG is pretty useless, as the system just
isn't usable with it due to spamming console (I imagine a randconfig
test robot will run into this sooner or later). Remove it.

Back in 2019 I used it occasionally to record traces of watchpoints and
verify the encoding is correct, but these days we have proper tests. If
something similar is needed in future, just add it back ad-hoc.

Signed-off-by: Marco Elver <elver@google.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Marco Elver 2021-06-07 14:56:48 +02:00 committed by Paul E. McKenney
parent eb32f9f990
commit a7a7369736
2 changed files with 0 additions and 12 deletions
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9
kernel/kcsan/core.c
View file

@ -479,15 +479,6 @@ kcsan_setup_watchpoint(const volatile void *ptr, size_t size, int type)
break; /* ignore; we do not diff the values */
}
if (IS_ENABLED(CONFIG_KCSAN_DEBUG)) {
kcsan_disable_current();
pr_err("watching %s, size: %zu, addr: %px [slot: %d, encoded: %lx]\n",
is_write ? "write" : "read", size, ptr,
watchpoint_slot((unsigned long)ptr),
encode_watchpoint((unsigned long)ptr, size, is_write));
kcsan_enable_current();
}
/*
* Delay this thread, to increase probability of observing a racy
* conflicting access.

3
lib/Kconfig.kcsan
View file

@ -62,9 +62,6 @@ config KCSAN_VERBOSE
generated from any one of them, system stability may suffer due to
deadlocks or recursion. If in doubt, say N.
config KCSAN_DEBUG
bool "Debugging of KCSAN internals"
config KCSAN_SELFTEST
bool "Perform short selftests on boot"
default y