From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 86F801917FB; Wed, 25 Feb 2026 16:42:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772037729; cv=none; b=QVCiXdMRMDQ66S0tEVMyHYOPmcqNhqhFnhJgprt5V3PGFYRV/2K32PynWBQQR4HElwOtLgbdsNKeHUcHIgDx0Le2S9+sF8u4Ll9fh9yJ0w7YFovEu9ymEz9zurxlNvM+qvfKwqRJWAwJCQor787RLRdbVqDztcE6PLjZCPeMSL8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772037729; c=relaxed/simple; bh=5t5YBl6F2Q9NBmrbuy0kWi5Y1JLcv4Ia1Fv2DnfmLP0=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=I2ZPrbXaEFnRVAP9J2+f6n4DMlt9eL+vfgsAfgUmFoDzrZwucs7s1vGzp3p4q0xXk7ZNie0xFxjXANIbLaM9fU6ROsk4zYuEpUDPB4sJMwjpogoOnskAY/M4q2pu73EiFC2kTVslaKTmcyQDmKtTDKub3LHOHt48HnNpfcWWQF8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=R9SbsQH4; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="R9SbsQH4" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 85C74C19422; Wed, 25 Feb 2026 16:42:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772037728; bh=5t5YBl6F2Q9NBmrbuy0kWi5Y1JLcv4Ia1Fv2DnfmLP0=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=R9SbsQH4kO433LJbxIRQ9G2QyIvijqX+2UUdxf2AUxhpkZL8D/w1n1UnLOE5WcFHo W7SnFVYG66c559MuvTJfU6g4OrKlyo7phg49rhhs6jppBjtf+u6SNVc8bIwsdjRrHB ylDLpReT23aVYZp1JXVTm/ckzy/h9XZacpwGuWKcOCmiXOFiEPsdEnvbBV7C/HS/11 tT9zghsIuqAIhm8PKHKgLHVKNuAfAS3S1Z+unOmWa8txIeH9YgiZ92aP8lwlP+dvh9 KatmDuDrBKraDIZwCsQDrmLXCCpX4Tla0yk2aIZFbHV++fuiHkqFq2jlLL2kGuMjPS iAIxksUcUg5Fw== From: Maxime Ripard Date: Wed, 25 Feb 2026 17:41:52 +0100 Subject: [PATCH 4/7] mm: cma: Export dma_contiguous_default_area Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260225-dma-buf-heaps-as-modules-v1-4-2109225a090d@kernel.org> References: <20260225-dma-buf-heaps-as-modules-v1-0-2109225a090d@kernel.org> In-Reply-To: <20260225-dma-buf-heaps-as-modules-v1-0-2109225a090d@kernel.org> To: Sumit Semwal , Benjamin Gaignard , Brian Starkey , John Stultz , "T.J. Mercier" , =?utf-8?q?Christian_K=C3=B6nig?= , Marek Szyprowski , Robin Murphy , Andrew Morton , David Hildenbrand , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko Cc: linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org, linux-kernel@vger.kernel.org, iommu@lists.linux.dev, linux-mm@kvack.org, Maxime Ripard X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1222; i=mripard@kernel.org; h=from:subject:message-id; bh=5t5YBl6F2Q9NBmrbuy0kWi5Y1JLcv4Ia1Fv2DnfmLP0=; b=owGbwMvMwCmsHn9OcpHtvjLG02pJDJnz1fwlD7HqzlzmFiUT9/locsXjSdPy5/duZv67Q2xH2 cMJE172dExlYRDmZJAVU2R5IhN2enn74ioH+5U/YOawMoEMYeDiFICJTJ/LWB/ps5DNXZhFfnPS 0a/znj9cOXHb7Xz1BTOTd7PF+XT2KHwQvFN/ht8lk0Xkc/T6mR8KMxgbFu6MVBDJ9RL69WvG3mK ziocv1YyVTp6YUjW3Oe9TtvEBpZidmxSFCxta5F9+Vk6p4hUCAA== X-Developer-Key: i=mripard@kernel.org; a=openpgp; fpr=BE5675C37E818C8B5764241C254BCFC56BF6CE8D The CMA dma-buf heap uses the dev_get_cma_area() inline function that would either return the content of device.cma_area or the content of dma_contiguous_default_area. The latter holds a pointer to the default CMA region, and is stored in a public variable. However, that variable isn't exported which prevents to use dev_get_cma_area() in modules. Since we want to turn the CMA heap into a module, let's export dma_contiguous_default_area to allow modules to use dev_get_cma_area(). Signed-off-by: Maxime Ripard --- kernel/dma/contiguous.c | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/dma/contiguous.c b/kernel/dma/contiguous.c index 14bd54fb758537f01a6fe27318e7b683964e20b1..fb64ccb99243e3cfea4890391a723130db69ee94 100644 --- a/kernel/dma/contiguous.c +++ b/kernel/dma/contiguous.c @@ -52,10 +52,11 @@ #else #define CMA_SIZE_MBYTES 0 #endif struct cma *dma_contiguous_default_area; +EXPORT_SYMBOL_GPL(dma_contiguous_default_area); /* * Default global CMA area size can be defined in kernel's .config. * This is useful mainly for distro maintainers to create a kernel * that works correctly for most supported systems. -- 2.53.0