Messages in this thread Patch in this message | | | Date | Fri, 31 Jul 2020 10:17:22 +0200 | Subject | [PATCH 4/5] kcsan: Show message if enabled early | From | Marco Elver <> |
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Show a message in the kernel log if KCSAN was enabled early.
Signed-off-by: Marco Elver <elver@google.com> --- kernel/kcsan/core.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/kernel/kcsan/core.c b/kernel/kcsan/core.c index e43a55643e00..23d0c4e4cd3a 100644 --- a/kernel/kcsan/core.c +++ b/kernel/kcsan/core.c @@ -1,5 +1,7 @@ // SPDX-License-Identifier: GPL-2.0 +#define pr_fmt(fmt) "kcsan: " fmt + #include <linux/atomic.h> #include <linux/bug.h> #include <linux/delay.h> @@ -442,7 +444,7 @@ kcsan_setup_watchpoint(const volatile void *ptr, size_t size, int type) if (IS_ENABLED(CONFIG_KCSAN_DEBUG)) { kcsan_disable_current(); - pr_err("KCSAN: watching %s, size: %zu, addr: %px [slot: %d, encoded: %lx]\n", + 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)); @@ -601,8 +603,10 @@ void __init kcsan_init(void) * We are in the init task, and no other tasks should be running; * WRITE_ONCE without memory barrier is sufficient. */ - if (kcsan_early_enable) + if (kcsan_early_enable) { + pr_info("enabled early\n"); WRITE_ONCE(kcsan_enabled, true); + } } /* === Exported interface =================================================== */ -- 2.28.0.163.g6104cc2f0b6-goog
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