Messages in this thread | | | Date | Fri, 6 Jan 2006 18:38:46 +0000 | From | Russell King <> | Subject | Re: need for packed attribute |
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On Fri, Jan 06, 2006 at 07:15:43PM +0100, Oliver Neukum wrote: > Hi, > > is there any architecture for which packed is required in structures like this: > > /* All standard descriptors have these 2 fields at the beginning */ > struct usb_descriptor_header { > __u8 bLength; > __u8 bDescriptorType; > };
sizeof(struct usb_descriptor_header) will be 4 on ARM. If this concerns you, you need to pack the structure thusly:
struct usb_descriptor_header { __u8 bLength; __u8 bDescriptorType; } __attribute__((packed));
-- Russell King Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/ maintainer of: 2.6 Serial core - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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