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[82.64.73.52]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-434aa7e5e59sm190838035e9.44.2024.12.02.07.35.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 02 Dec 2024 07:35:08 -0800 (PST) Date: Mon, 2 Dec 2024 16:35:05 +0100 From: Dave Penkler To: Guenter Roeck Cc: Greg KH , Linus Torvalds , Andrew Morton , Stephen Rothwell , linux-kernel@vger.kernel.org, linux-staging@lists.linux.dev Subject: Re: [GIT PULL] Staging driver changes for 6.13-rc1 Message-ID: References: <2024113025-sly-footer-3462@gregkh> <7d7e65af-b818-45de-a92c-ee59a864dbdb@roeck-us.net> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Mon, Dec 02, 2024 at 06:52:28AM -0800, Guenter Roeck wrote: > On Mon, Dec 02, 2024 at 10:50:07AM +0100, Dave Penkler wrote: > [ ... ] > > That is weird: the type of resource.start is resource_size_t which resolves to u32 via phys_addr_t on i386 which should be the same size as void * > > For compile check purposes simply changing iobase type to phys_addr_t the following error message appears: > > > > drivers/staging/gpib/ines/ines_gpib.c: In function 'ines_common_pci_attach': > > drivers/staging/gpib/ines/ines_gpib.c:783:28: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast] > > 783 | nec_priv->iobase = (void *)(pci_resource_start(ines_priv->pci_device, > > | ^ > > drivers/staging/gpib/ines/ines_gpib.c:783:26: error: assignment to 'phys_addr_t' {aka 'long long unsigned int'} from 'void *' makes integer from pointer without a cast [-Wint-conversion] > > 783 | nec_priv->iobase = (void *)(pci_resource_start(ines_priv->pci_device, > > | ^ > > > > It would seem that for some reason phys_addr_t resolves to long long unsigned int > > Check out CONFIG_X86_PAE, which adds 64-bit physical address support to > 32-bit x86 images. Pointers are still 32 bit in that mode, though. > > Guenter OK thanks. I will submit a patch to use ioremap. -Dave