From: Markus Elfring <Markus.Elfring@web.de>
To: "Ekansh Gupta" <ekansh.gupta@oss.qualcomm.com>,
dri-devel@lists.freedesktop.org, iommu@lists.linux.dev,
llvm@lists.linux.dev, linux-media@vger.kernel.org,
linux-arm-msm@vger.kernel.org, linaro-mm-sig@lists.linaro.org,
"Bill Wendling" <morbo@google.com>,
"Christian König" <christian.koenig@amd.com>,
"David Airlie" <airlied@gmail.com>,
"Jonathan Corbet" <corbet@lwn.net>,
"Jörg Rödel" <joro@8bytes.org>,
"Justin Stitt" <justinstitt@google.com>,
"Maarten Lankhorst" <maarten.lankhorst@linux.intel.com>,
"Maxime Ripard" <mripard@kernel.org>,
"Nathan Chancellor" <nathan@kernel.org>,
"Nick Desaulniers" <ndesaulniers@google.com>,
"Oded Gabbay" <ogabbay@kernel.org>,
"Randy Dunlap" <rdunlap@infradead.org>,
"Robin Murphy" <robin.murphy@arm.com>,
"Shuah Khan" <skhan@linuxfoundation.org>,
"Simona Vetter" <simona@ffwll.ch>,
"Sumit Semwal" <sumit.semwal@linaro.org>,
"Thomas Zimmermann" <tzimmermann@suse.de>,
"Will Deacon" <will@kernel.org>
Cc: linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
"Bharath Kumar" <quic_bkumar@quicinc.com>,
"Chenna Kesava Raju" <quic_chennak@quicinc.com>,
"Dmitry Baryshkov" <dmitry.baryshkov@oss.qualcomm.com>,
"Srinivas Kandagatla" <srinivas.kandagatla@oss.qualcomm.com>,
"Jörg Rödel" <joro@8bytes.org>
Subject: Re: [PATCH v2 09/15] accel/qda: Add DMA-backed GEM objects and memory manager integration
Date: Wed, 26 Aug 2026 19:00:10 +0200 [thread overview]
Message-ID: <0d6bb2d4-5f6b-4fd6-9b9f-5f5f0f687625@web.de> (raw)
In-Reply-To: <20260817-qda-v2-v2-9-69a02e9090d4@oss.qualcomm.com>
…
> +++ b/drivers/accel/qda/qda_memory_manager.c
…
> +int qda_memory_manager_assign_device(struct qda_memory_manager *mem_mgr,
> + struct drm_file *file_priv)
> +{
…
> + current_pid = qda_priv->pid;
> +
> + mutex_lock(&mem_mgr->process_assignment_lock);
…
> +unlock_and_return:
> + mutex_unlock(&mem_mgr->process_assignment_lock);
> +
> + return ret;
> +}
…
Under which circumstances would you become interested to apply a statement
like “guard(mutex)(&mem_mgr->process_assignment_lock);”?
https://elixir.bootlin.com/linux/v7.2/source/include/linux/mutex.h#L253
Regards,
Markus
next prev parent reply other threads:[~2026-08-26 17:01 UTC|newest]
Thread overview: 71+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-17 4:47 [PATCH v2 00/15] accel/qda: Qualcomm DSP Accelerator driver Ekansh Gupta
2026-08-17 4:47 ` [PATCH v2 01/15] MAINTAINERS: Add entry for Qualcomm DSP Accelerator (QDA) driver Ekansh Gupta
2026-08-18 19:22 ` Krzysztof Kozlowski
2026-08-19 13:05 ` Ekansh Gupta
2026-08-19 14:16 ` Krzysztof Kozlowski
2026-08-20 4:12 ` Ekansh Gupta
2026-08-17 4:47 ` [PATCH v2 02/15] accel/qda: Add QDA driver documentation Ekansh Gupta
2026-08-17 4:47 ` [PATCH v2 03/15] accel/qda: Add initial QDA DRM accelerator driver Ekansh Gupta
2026-08-18 19:10 ` Krzysztof Kozlowski
2026-08-19 13:17 ` Ekansh Gupta
2026-08-19 14:18 ` Krzysztof Kozlowski
2026-08-20 8:52 ` Dmitry Baryshkov
2026-08-20 9:07 ` Krzysztof Kozlowski
2026-08-20 10:07 ` Dmitry Baryshkov
2026-08-20 13:31 ` Krzysztof Kozlowski
2026-08-17 4:47 ` [PATCH v2 04/15] accel/qda: Add compute bus for QDA context banks Ekansh Gupta
2026-08-17 4:47 ` [PATCH v2 05/15] iommu: Add QDA compute context bank bus to iommu_buses Ekansh Gupta
2026-08-17 7:01 ` Joerg Roedel (AMD)
2026-08-17 13:44 ` Jason Gunthorpe
2026-08-18 5:10 ` Ekansh Gupta
2026-08-18 13:07 ` Jason Gunthorpe
2026-08-20 13:17 ` Ekansh Gupta
2026-08-17 4:47 ` [PATCH v2 06/15] accel/qda: Create compute context bank devices on QDA compute bus Ekansh Gupta
2026-08-17 4:47 ` [PATCH v2 07/15] accel/qda: Add memory manager for CB devices Ekansh Gupta
2026-08-17 6:52 ` Dmitry Baryshkov
2026-08-18 4:33 ` Ekansh Gupta
2026-08-18 4:44 ` Dmitry Baryshkov
2026-08-17 4:47 ` [PATCH v2 08/15] accel/qda: Add QUERY IOCTL and QDA UAPI header Ekansh Gupta
2026-08-17 6:58 ` Dmitry Baryshkov
2026-08-18 4:40 ` Ekansh Gupta
2026-08-18 4:45 ` Dmitry Baryshkov
2026-08-17 4:47 ` [PATCH v2 09/15] accel/qda: Add DMA-backed GEM objects and memory manager integration Ekansh Gupta
2026-08-18 3:42 ` Dmitry Baryshkov
2026-08-18 5:51 ` Ekansh Gupta
2026-08-18 3:48 ` Dmitry Baryshkov
2026-08-18 5:52 ` Ekansh Gupta
2026-08-24 14:30 ` Christian König
2026-08-24 15:07 ` Rob Clark
2026-08-25 13:59 ` Christian König
2026-08-26 13:45 ` Ekansh Gupta
2026-08-26 17:00 ` Markus Elfring [this message]
2026-08-17 4:47 ` [PATCH v2 10/15] accel/qda: Add GEM_CREATE and GEM_MMAP_OFFSET IOCTLs Ekansh Gupta
2026-08-18 3:49 ` Dmitry Baryshkov
2026-08-18 5:54 ` Ekansh Gupta
2026-08-17 4:47 ` [PATCH v2 11/15] accel/qda: Add PRIME DMA-BUF import support Ekansh Gupta
2026-08-18 3:55 ` Dmitry Baryshkov
2026-08-18 6:25 ` Ekansh Gupta
2026-08-17 4:47 ` [PATCH v2 12/15] accel/qda: Add FastRPC invocation support Ekansh Gupta
2026-08-18 4:19 ` Dmitry Baryshkov
2026-08-20 8:35 ` Ekansh Gupta
2026-08-17 4:47 ` [PATCH v2 13/15] accel/qda: Add DSP process creation and release Ekansh Gupta
2026-08-17 4:47 ` [PATCH v2 14/15] accel/qda: Add remote memory mapping to DSP address space Ekansh Gupta
2026-08-18 19:13 ` [PATCH v2 00/15] accel/qda: Qualcomm DSP Accelerator driver Krzysztof Kozlowski
2026-08-18 19:21 ` Krzysztof Kozlowski
2026-08-19 13:32 ` Ekansh Gupta
2026-08-19 14:19 ` Krzysztof Kozlowski
2026-08-19 13:26 ` Ekansh Gupta
2026-08-19 14:21 ` Krzysztof Kozlowski
2026-08-19 14:38 ` Rob Clark
2026-08-19 14:40 ` Konrad Dybcio
2026-08-19 14:43 ` Krzysztof Kozlowski
2026-08-19 14:49 ` Rob Clark
2026-08-19 14:53 ` Krzysztof Kozlowski
2026-08-19 15:23 ` Rob Clark
2026-08-19 15:27 ` Krzysztof Kozlowski
2026-08-19 15:48 ` Rob Clark
2026-08-20 6:15 ` Krzysztof Kozlowski
2026-08-20 14:47 ` Rob Clark
2026-08-26 13:07 ` Ekansh Gupta
2026-08-18 19:18 ` Krzysztof Kozlowski
2026-08-19 13:23 ` Ekansh Gupta
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