summaryrefslogtreecommitdiffstats
path: root/kernel/kcsan
diff options
context:
space:
mode:
authorMarco Elver <elver@google.com>2020-07-31 10:17:22 +0200
committerPaul E. McKenney <paulmck@kernel.org>2020-08-24 15:10:22 -0700
commit2778793072c31e3eb33842f3bd7da82dfc7efc6b (patch)
treec956c94c4bb96951959f28f7838d7b98bd19cb1f /kernel/kcsan
parent4700ccdf18fa3002d66769b69cf715cc58beea37 (diff)
downloadlinux-2778793072c31e3eb33842f3bd7da82dfc7efc6b.tar.bz2
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')
-rw-r--r--kernel/kcsan/core.c8
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 =================================================== */