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[2001:678:a5c:1202:4fb5:f16a:579c:6dcb]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-553ac1f91ddsm1900394e87.250.2025.06.17.06.05.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 17 Jun 2025 06:05:05 -0700 (PDT) From: Klara Modin To: paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, alex@ghiti.fr, conor.dooley@microchip.com, valentina.fernandezalanis@microchip.com Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, Klara Modin , stable@vger.kernel.org Subject: [PATCH] riscv: export boot_cpu_hartid Date: Tue, 17 Jun 2025 14:58:47 +0200 Message-ID: <20250617125847.23829-1-klarasmodin@gmail.com> X-Mailer: git-send-email 2.49.0 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250617_060508_680991_9AC89964 X-CRM114-Status: UNSURE ( 8.39 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org The mailbox controller driver for the Microchip Inter-processor Communication can be built as a module. It uses cpuid_to_hartid_map and commit 4783ce32b080 ("riscv: export __cpuid_to_hartid_map") enables that to work for SMP. However, cpuid_to_hartid_map uses boot_cpu_hartid on non-SMP kernels and this driver can be useful in such configurations[1]. Export boot_cpu_hartid so the driver can be built as a module on non-SMP kernels as well. Link: https://lore.kernel.org/lkml/20250617-confess-reimburse-876101e099cb@spud/ [1] Cc: stable@vger.kernel.org Fixes: e4b1d67e7141 ("mailbox: add Microchip IPC support") Signed-off-by: Klara Modin --- arch/riscv/kernel/setup.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/riscv/kernel/setup.c b/arch/riscv/kernel/setup.c index f7c9a1caa83e..14888e5ea19a 100644 --- a/arch/riscv/kernel/setup.c +++ b/arch/riscv/kernel/setup.c @@ -50,6 +50,7 @@ atomic_t hart_lottery __section(".sdata") #endif ; unsigned long boot_cpu_hartid; +EXPORT_SYMBOL_GPL(boot_cpu_hartid); /* * Place kernel memory regions on the resource tree so that -- 2.49.0 _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-lf1-f48.google.com (mail-lf1-f48.google.com [209.85.167.48]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D63F22E2641; Tue, 17 Jun 2025 13:05:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.48 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750165510; cv=none; b=keSK4dWo3/uoL8KIp5+6fDzhLjaT8eEBJch9x+US33nLEbY062cIObXOyKT4Xd8tUNppULAUfIOPXScGPsYYhO3Yc6vCAzUn692cmkgIfVTsWtq7eVlhdKAgxll75/0C+fHR3zspEM4lDSw53/HIGCGq8tzDdUapDM2CJVMkW8E= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750165510; c=relaxed/simple; bh=xUevxqP7qeHQyrqc8eeur3FyUDeFXsqRS6sO3KTeE1s=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=HNWdlsg4zOEIMtqiGt9aBbT6/shQ4P9Km8O4V44cliw+ZARfeFybys0i1ud7hzgDAnQvi8UxwNe86tGcF11gRgirlTGnRXqdhbcEE79tZjuF/wZkx6cyv1r/mRYwYm3dXq3rXImV6DkaUydoWiNrOFU1Hh+z4JVao86JtqGdtNg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=mFpJ1kjM; arc=none smtp.client-ip=209.85.167.48 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="mFpJ1kjM" Received: by mail-lf1-f48.google.com with SMTP id 2adb3069b0e04-553be4d2fbfso2760078e87.0; Tue, 17 Jun 2025 06:05:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1750165507; x=1750770307; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=hQ7rt4e14DyPGgHQFy3EQy+5G7wFsrLkDEYIps9brIY=; b=mFpJ1kjMUtq7TTL3NIxllOppRvClAn2qAeHE0EOYP4PuE/JeLxUyfI+P16t6AmDEaT bD9GhHgbpuPQz0l2XSGq9GOQUL00V0/XCExL0kJiCuIoSrHTE9ccDigfR8WrcIDhsMwb IA7/q3vlA8Ppo2LkcgWRl4H/SPwNwWoP3pHjGsNsFYuM/hp6eodu2rLLhxZ8W5byzILD Uwlly9uXTtg5yK1QHTff8lr09M1ZhISPhVXh+lXBoYkTCwApBW25yR4KcBUIX+YR+JuK 4x1yXJSVl/hYinXCgXjiPlhUKQ40o31NS8lBFrcYPsegVZN0nW95cRjDBe+8Uzy9ztrZ tgmQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1750165507; x=1750770307; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=hQ7rt4e14DyPGgHQFy3EQy+5G7wFsrLkDEYIps9brIY=; b=Kh9k5XSCbKONoCGMFgChv5LiA5/qPMu2sPtP+JEg5QeBNdtn0hPRwVJW0+abWHfPcs eWONetTkNZiKoTXtd+wtbjE35SgiE0iUnO8G1R5089obmZiQ2nSr9JyIxYOp1u9eE1B9 7x9aoit/iqpZ+wiDbrLvZGINtm5ur+wWp1rwibATAZnquBe27rYY/OxMa3HA5XaBHGUq FDZLnanbS42bYvW5kpXHfAqeCyzDH1pvNrM0eY8kq7lpqUOHc6l5QDEj6ZCyxyQxbBC/ akiW+NSPa4gcpvDtbFecFRxvAWqWDrmBqlFaccJmktWQiHMHap+4UqD+22QqNKvZChj4 BDnQ== X-Forwarded-Encrypted: i=1; AJvYcCU8NvdvMGt1ChVgl0cjtCzt1eG367C6N/0Lb/WHAQsKvz/KlhYC9IvIBow7Q06OQwZjXerhYUvj@vger.kernel.org, AJvYcCXwm7vroIx8qCsBeScma4DrB61d5g/FLr9Z8jcQUzKPHZAa19aOA33u3utlQPBZNciKUgvHfkAvH0/DvW8=@vger.kernel.org X-Gm-Message-State: AOJu0YxgQm9l4BcThJyvX+PcMwP6Pv3tBKQNUkwMiH1Hvg0yebshE5HG 4bpQv2VqEw+76Cf7Zrt9nQMzm8mqmGKbD4lY660xqXI67wDwrv+tfu+b X-Gm-Gg: ASbGncu5+MzBxwhmOJF7MEslvMO+wQD+xH271OJQHzmce9gMY5XQXGzMLB/MUw5RSjS GUNssieKfzx+fk3bYyuXIuI/d3/BSF6C+VLKn9JzcYm8+PmYqwDUcYqy7YQEODE3IWciT8pkkOb fdFjAzJL11sMqSEfGNTmdqhwbwFYB9UIutSANtdTGNbqqzH5bKkRSDxiOBJicmVdM7uwRLDO86f 9saz+GIzr5bcl2XlTfe8QS4f935Ag0ZcFMWVkc6vqgUQ/hHmfK1YmpTVeW4Du+FJmXKv9AlmOJm K5SikhQyge35TVbWFa0tSOCcvVQi1Zx2nE+pe47y2pmYUP/Vblag+vpF62/8uuOn+AfCA01+ZKA VAV8cTb5RO+oQFihqYQ== X-Google-Smtp-Source: AGHT+IHHo3gWM8jne4M/ik8SRuW9s/CXCSDuf5VVjjbmz065W7Ty2nNpgRR2fJksE2eb2m1Q59uOcg== X-Received: by 2002:a05:6512:15a2:b0:553:2ef3:f73d with SMTP id 2adb3069b0e04-553b6e8851amr3027873e87.14.1750165506269; Tue, 17 Jun 2025 06:05:06 -0700 (PDT) Received: from localhost.localdomain (soda.int.kasm.eu. [2001:678:a5c:1202:4fb5:f16a:579c:6dcb]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-553ac1f91ddsm1900394e87.250.2025.06.17.06.05.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 17 Jun 2025 06:05:05 -0700 (PDT) From: Klara Modin To: paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, alex@ghiti.fr, conor.dooley@microchip.com, valentina.fernandezalanis@microchip.com Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, Klara Modin , stable@vger.kernel.org Subject: [PATCH] riscv: export boot_cpu_hartid Date: Tue, 17 Jun 2025 14:58:47 +0200 Message-ID: <20250617125847.23829-1-klarasmodin@gmail.com> X-Mailer: git-send-email 2.49.0 Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The mailbox controller driver for the Microchip Inter-processor Communication can be built as a module. It uses cpuid_to_hartid_map and commit 4783ce32b080 ("riscv: export __cpuid_to_hartid_map") enables that to work for SMP. However, cpuid_to_hartid_map uses boot_cpu_hartid on non-SMP kernels and this driver can be useful in such configurations[1]. Export boot_cpu_hartid so the driver can be built as a module on non-SMP kernels as well. Link: https://lore.kernel.org/lkml/20250617-confess-reimburse-876101e099cb@spud/ [1] Cc: stable@vger.kernel.org Fixes: e4b1d67e7141 ("mailbox: add Microchip IPC support") Signed-off-by: Klara Modin --- arch/riscv/kernel/setup.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/riscv/kernel/setup.c b/arch/riscv/kernel/setup.c index f7c9a1caa83e..14888e5ea19a 100644 --- a/arch/riscv/kernel/setup.c +++ b/arch/riscv/kernel/setup.c @@ -50,6 +50,7 @@ atomic_t hart_lottery __section(".sdata") #endif ; unsigned long boot_cpu_hartid; +EXPORT_SYMBOL_GPL(boot_cpu_hartid); /* * Place kernel memory regions on the resource tree so that -- 2.49.0