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Wed, 20 Aug 2025 02:17:55 -0700 (PDT) Received: from localhost.localdomain ([114.242.33.243]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-76e7ccfa8d1sm4847120b3a.0.2025.08.20.02.17.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 20 Aug 2025 02:17:54 -0700 (PDT) From: Jinchao Wang To: pmladek@suse.com, akpm@linux-foundation.org, Steven Rostedt , John Ogness , Sergey Senozhatsky Cc: linux-kernel@vger.kernel.org, feng.tang@linux.alibaba.com, joel.granados@kernel.org, wangjinchao600@gmail.com, namcao@linutronix.de, sravankumarlpu@gmail.com Subject: [PATCH 6/9] printk/nbcon: use panic_on_this_cpu() helper Date: Wed, 20 Aug 2025 17:14:51 +0800 Message-ID: <20250820091702.512524-7-wangjinchao600@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250820091702.512524-6-wangjinchao600@gmail.com> References: <20250820091702.512524-1-wangjinchao600@gmail.com> <20250820091702.512524-2-wangjinchao600@gmail.com> <20250820091702.512524-3-wangjinchao600@gmail.com> <20250820091702.512524-4-wangjinchao600@gmail.com> <20250820091702.512524-5-wangjinchao600@gmail.com> <20250820091702.512524-6-wangjinchao600@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit nbcon_context_try_acquire() compared panic_cpu directly with smp_processor_id(). This open-coded check is now provided by panic_on_this_cpu(). Switch to panic_on_this_cpu() to simplify the code and improve readability. Signed-off-by: Jinchao Wang --- kernel/printk/nbcon.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/kernel/printk/nbcon.c b/kernel/printk/nbcon.c index 646801813415..7490865e2f44 100644 --- a/kernel/printk/nbcon.c +++ b/kernel/printk/nbcon.c @@ -2,6 +2,7 @@ // Copyright (C) 2022 Linutronix GmbH, John Ogness // Copyright (C) 2022 Intel, Thomas Gleixner +#include "linux/panic.h" #include #include #include @@ -589,7 +590,6 @@ static struct printk_buffers panic_nbcon_pbufs; */ static bool nbcon_context_try_acquire(struct nbcon_context *ctxt, bool is_reacquire) { - unsigned int cpu = smp_processor_id(); struct console *con = ctxt->console; struct nbcon_state cur; int err; @@ -614,7 +614,7 @@ static bool nbcon_context_try_acquire(struct nbcon_context *ctxt, bool is_reacqu /* Acquire succeeded. */ /* Assign the appropriate buffer for this context. */ - if (atomic_read(&panic_cpu) == cpu) + if (panic_on_this_cpu()) ctxt->pbufs = &panic_nbcon_pbufs; else ctxt->pbufs = con->pbufs; -- 2.43.0