From: Marco Elver <elver@google.com>
Date: Mon, 9 Aug 2021 11:25:15 +0000 (+0200)
Subject: kcsan: Support reporting scoped read-write access type
X-Git-Tag: v6.6.17~8839^2~2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d627c537c2585875bba071bbfa7cda20328f982b;p=platform%2Fkernel%2Flinux-rpi.git

kcsan: Support reporting scoped read-write access type

Support generating the string representation of scoped read-write
accesses for completeness. They will become required in planned changes.

Signed-off-by: Marco Elver <elver@google.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
---

diff --git a/kernel/kcsan/kcsan_test.c b/kernel/kcsan/kcsan_test.c
index a3b1242..6607292 100644
--- a/kernel/kcsan/kcsan_test.c
+++ b/kernel/kcsan/kcsan_test.c
@@ -210,10 +210,12 @@ static bool report_matches(const struct expect_report *r)
 							"read-write" :
 							"write") :
 					       "read");
+		const bool is_atomic = (ty & KCSAN_ACCESS_ATOMIC);
+		const bool is_scoped = (ty & KCSAN_ACCESS_SCOPED);
 		const char *const access_type_aux =
-			(ty & KCSAN_ACCESS_ATOMIC) ?
-				      " (marked)" :
-				      ((ty & KCSAN_ACCESS_SCOPED) ? " (scoped)" : "");
+				(is_atomic && is_scoped)	? " (marked, scoped)"
+				: (is_atomic			? " (marked)"
+				   : (is_scoped			? " (scoped)" : ""));
 
 		if (i == 1) {
 			/* Access 2 */
diff --git a/kernel/kcsan/report.c b/kernel/kcsan/report.c
index 4849cde..fc15077 100644
--- a/kernel/kcsan/report.c
+++ b/kernel/kcsan/report.c
@@ -247,6 +247,10 @@ static const char *get_access_type(int type)
 		return "write (scoped)";
 	case KCSAN_ACCESS_SCOPED | KCSAN_ACCESS_WRITE | KCSAN_ACCESS_ATOMIC:
 		return "write (marked, scoped)";
+	case KCSAN_ACCESS_SCOPED | KCSAN_ACCESS_COMPOUND | KCSAN_ACCESS_WRITE:
+		return "read-write (scoped)";
+	case KCSAN_ACCESS_SCOPED | KCSAN_ACCESS_COMPOUND | KCSAN_ACCESS_WRITE | KCSAN_ACCESS_ATOMIC:
+		return "read-write (marked, scoped)";
 	default:
 		BUG();
 	}