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[109.60.37.145]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b7cf2a9717fsm53958266b.24.2025.12.10.03.25.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 10 Dec 2025 03:25:37 -0800 (PST) Date: Wed, 10 Dec 2025 12:25:35 +0100 From: Marko Turk To: dakr@kernel.org, bhelgaas@google.com, kwilczynski@kernel.org, miguel.ojeda.sandonis@gmail.com, dirk.behme@de.bosch.com, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, rust-for-linux@vger.kernel.org, mt@markoturk.info Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, rust-for-linux@vger.kernel.org, Marko Turk Subject: [PATCH 1/2] rust: pci: document Bar's endianness conversion Message-ID: <20251210112503.62925-1-mt@markoturk.info> Precedence: bulk X-Mailing-List: rust-for-linux@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline X-Mailer: git-send-email 2.51.0 Document that the Bar's MMIO backend always assumes little-endian devices and that its operations automatically convert to CPU endianness. Signed-off-by: Marko Turk Link: https://lore.kernel.org/lkml/DE7F6RR1NAKW.3DJYO44O73941@kernel.org/ --- rust/kernel/pci/io.rs | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/rust/kernel/pci/io.rs b/rust/kernel/pci/io.rs index 0d55c3139b6f..bfa9df9e9bb9 100644 --- a/rust/kernel/pci/io.rs +++ b/rust/kernel/pci/io.rs @@ -18,9 +18,12 @@ /// A PCI BAR to perform I/O-Operations on. /// +/// I/O backend assumes that the device is little-endian and will automatically +/// convert from little-endian to CPU endianness. +/// /// # Invariants /// -/// `Bar` always holds an `IoRaw` inststance that holds a valid pointer to the start of the I/O +/// `Bar` always holds an `IoRaw` instance that holds a valid pointer to the start of the I/O /// memory mapped PCI BAR and its size. pub struct Bar { pdev: ARef, -- 2.51.0