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

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Message-Id: <20211118081027.3175699-3-elver@google.com>
Date:   Thu, 18 Nov 2021 09:10:06 +0100
From:   Marco Elver <elver@...gle.com>
To:     elver@...gle.com, "Paul E. McKenney" <paulmck@...nel.org>
Cc:     Alexander Potapenko <glider@...gle.com>,
        Boqun Feng <boqun.feng@...il.com>,
        Borislav Petkov <bp@...en8.de>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Ingo Molnar <mingo@...nel.org>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Waiman Long <longman@...hat.com>,
        Will Deacon <will@...nel.org>, kasan-dev@...glegroups.com,
        linux-arch@...r.kernel.org, linux-doc@...r.kernel.org,
        linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, x86@...nel.org
Subject: [PATCH v2 02/23] kcsan: Remove redundant zero-initialization of globals

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@...gle.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