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| author | Marco Elver <elver@google.com> | 2020-07-31 10:17:22 +0200 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2020-08-24 15:10:22 -0700 |
| commit | 2778793072c31e3eb33842f3bd7da82dfc7efc6b (patch) | |
| tree | c956c94c4bb96951959f28f7838d7b98bd19cb1f /kernel/kcsan/core.c | |
| parent | 4700ccdf18fa3002d66769b69cf715cc58beea37 (diff) | |
| download | lwn-2778793072c31e3eb33842f3bd7da82dfc7efc6b.tar.gz lwn-2778793072c31e3eb33842f3bd7da82dfc7efc6b.zip | |
kcsan: Show message if enabled early
Show a message in the kernel log if KCSAN was enabled early.
Signed-off-by: Marco Elver <elver@google.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'kernel/kcsan/core.c')
| -rw-r--r-- | kernel/kcsan/core.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/kernel/kcsan/core.c b/kernel/kcsan/core.c index 99e5044bc942..b176400a2735 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> @@ -463,7 +465,7 @@ 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)); @@ -623,8 +625,10 @@ 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 =================================================== */ |