linux-kernel - [PATCH] mm: remove unnecessary check in alloc_thread_stack

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Date:   Tue, 1 Mar 2022 11:07:06 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     "Eric W. Biederman" <ebiederm@...ssion.com>,
        Andrey Konovalov <andreyknvl@...gle.com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Peter Zijlstra <peterz@...radead.org>,
        Andy Lutomirski <luto@...nel.org>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Alexey Gladkov <legion@...nel.org>,
        "Liam R. Howlett" <Liam.Howlett@...cle.com>,
        Jens Axboe <axboe@...nel.dk>,
        David Hildenbrand <david@...hat.com>,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: [PATCH] mm: remove unnecessary check in alloc_thread_stack_node()

The "stack" pointer cannot be NULL at this point so there is no
need to check.

Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
---
 kernel/fork.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/kernel/fork.c b/kernel/fork.c
index 516f9db66640..5e7ca394b8e3 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -327,8 +327,7 @@ static int alloc_thread_stack_node(struct task_struct *tsk, int node)
 	 * so cache the vm_struct.
 	 */
 	tsk->stack_vm_area = vm;
-	if (stack)
-		stack = kasan_reset_tag(stack);
+	stack = kasan_reset_tag(stack);
 	tsk->stack = stack;
 	return 0;
 }
-- 
2.20.1