[PATCH v2 02/23] kcsan: Remove redundant zero-initialization of globals

From: Marco Elver <elver@google.com>
To: elver@google.com, "Paul E. McKenney" <paulmck@kernel.org>
Cc: Alexander Potapenko <glider@google.com>,
	Boqun Feng <boqun.feng@gmail.com>, Borislav Petkov <bp@alien8.de>,
	Dmitry Vyukov <dvyukov@google.com>,
	Ingo Molnar <mingo@kernel.org>,
	Josh Poimboeuf <jpoimboe@redhat.com>,
	Mark Rutland <mark.rutland@arm.com>,
	Peter Zijlstra <peterz@infradead.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Waiman Long <longman@redhat.com>, Will Deacon <will@kernel.org>,
	kasan-dev@googlegroups.com, linux-arch@vger.kernel.org,
	linux-doc@vger.kernel.org, linux-kbuild@vger.kernel.org,
	linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org
Subject: [PATCH v2 02/23] kcsan: Remove redundant zero-initialization of globals
Date: Thu, 18 Nov 2021 09:10:06 +0100	[thread overview]
Message-ID: <20211118081027.3175699-3-elver@google.com> (raw)
In-Reply-To: <20211118081027.3175699-1-elver@google.com>

They are implicitly zero-initialized, remove explicit initialization.
It keeps the upcoming additions to kcsan_ctx consistent with the rest.

No functional change intended.

Signed-off-by: Marco Elver <elver@google.com>
---
 init/init_task.c    | 9 +--------
 kernel/kcsan/core.c | 5 -----
 2 files changed, 1 insertion(+), 13 deletions(-)

diff --git a/init/init_task.c b/init/init_task.c
index 2d024066e27b..61700365ce58 100644
--- a/init/init_task.c
+++ b/init/init_task.c
@@ -181,14 +181,7 @@ struct task_struct init_task
 	.kasan_depth	= 1,
 #endif
 #ifdef CONFIG_KCSAN
-	.kcsan_ctx = {
-		.disable_count		= 0,
-		.atomic_next		= 0,
-		.atomic_nest_count	= 0,
-		.in_flat_atomic		= false,
-		.access_mask		= 0,
-		.scoped_accesses	= {LIST_POISON1, NULL},
-	},
+	.kcsan_ctx = { .scoped_accesses = {LIST_POISON1, NULL} },
 #endif
 #ifdef CONFIG_TRACE_IRQFLAGS
 	.softirqs_enabled = 1,
diff --git a/kernel/kcsan/core.c b/kernel/kcsan/core.c
index 6bfd3040f46b..e34a1710b7bc 100644
--- a/kernel/kcsan/core.c
+++ b/kernel/kcsan/core.c
@@ -44,11 +44,6 @@ bool kcsan_enabled;
 
 /* Per-CPU kcsan_ctx for interrupts */
 static DEFINE_PER_CPU(struct kcsan_ctx, kcsan_cpu_ctx) = {
-	.disable_count		= 0,
-	.atomic_next		= 0,
-	.atomic_nest_count	= 0,
-	.in_flat_atomic		= false,
-	.access_mask		= 0,
 	.scoped_accesses	= {LIST_POISON1, NULL},
 };
 
-- 
2.34.0.rc2.393.gf8c9666880-goog

