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([2a01:4b00:bd21:4f00:7cc6:d3ca:494:116c]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4a1b3602990sm52779585e9.0.2026.10.14.06.07.00 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 14 Oct 2026 06:07:00 -0700 (PDT) Message-ID: <8d0e7d1e-086b-413a-87de-20e21f519daa@gmail.com> Date: Wed, 14 Oct 2026 14:06:59 +0100 Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v11 01/13] dma-buf: introduce initial file I/O infrastructure To: =?UTF-8?Q?Christian_K=C3=B6nig?= , linux-block@vger.kernel.org Cc: linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org, linux-nvme@lists.infradead.org, linux-fsdevel@vger.kernel.org, io-uring@vger.kernel.org, dm-devel@lists.linux.dev References: <49e24334953262e85d5616c9afde88c680e4f3a3.1791975048.git.asml.silence@gmail.com> Content-Language: en-US From: Pavel Begunkov In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit On 10/14/26 13:30, Christian König wrote: > On 10/14/26 13:01, Pavel Begunkov wrote: ...>> +static void dma_buf_io_kill_map(struct dma_buf_io_ctx *ctx) >> +{ >> + struct dma_buf_io_map *map; >> + >> + dma_resv_assert_held(ctx->dmabuf->resv); >> + >> + map = rcu_dereference_protected(ctx->map, >> + dma_resv_held(ctx->dmabuf->resv)); >> + if (!map) >> + return; >> + >> + rcu_assign_pointer(ctx->map, NULL); >> + percpu_ref_kill(&map->refs); >> + /* make sure the map is not visible via ctx->map */ >> + synchronize_rcu_expedited(); >> + wait_for_completion(&map->drained); >> + dma_buf_io_map_release(map); >> +} >> + >> +int dma_buf_io_init_map(struct dma_buf_io_ctx *ctx, struct dma_buf_io_map *map, >> + struct sg_table *sgt) > > You somehow forgotten the kerneldoc I asked for here. Ah yes, missed that function. I'll add it but perhaps in a separate patch, if you don't mind, depending whether we queue it for 7.4. > Apart from that still looks good, but I had only time to skim over it. -- Pavel Begunkov